56个 PHP 开发常用代码片段

在编写代码的时候有个神奇的工具总是好的!下面这里收集了 50+ PHP 代码片段,可以帮助你开发 PHP 项目。 
这些 PHP 片段对于 PHP 初学者也非常有帮助,非常容易学习,让我们开始学习吧~ 
1. 发送 SMS在开发 Web 或者移动应用的时候,经常会遇到需要发送 SMS 给用户,或者因为登录原因,或者是为了发送信息。下面的 PHP 代码就实现了发送 SMS 的功能。 
为了使用任何的语言发送 SMS,需要一个 SMS gateway。大部分的 SMS 会提供一个 API,这里是使用 MSG91 作为 SMS gateway。 

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function send_sms($mobile,$msg)

{

$authKey = "XXXXXXXXXXX";

date_default_timezone_set("Asia/Kolkata");

$date = strftime("%Y-%m-%d %H:%M:%S");

//Multiple mobiles numbers separated by comma

$mobileNumber = $mobile;

//Sender ID,While using route4 sender id should be 6 characters long.

$senderId = "IKOONK";

//Your message to send, Add URL encoding here.

$message = urlencode($msg);

//Define route

$route = "template";

//Prepare you post parameters

$postData = array(

    'authkey' => $authKey,

    'mobiles' => $mobileNumber,

    'message' => $message,

    'sender' => $senderId,

    'route' => $route

);

//API URL

$url="https://control.msg91.com/sendhttp.php";

// init the resource

$ch = curl_init();

curl_setopt_array($ch, array(

    CURLOPT_URL => $url,

    CURLOPT_RETURNTRANSFER => true,

    CURLOPT_POST => true,

    CURLOPT_POSTFIELDS => $postData

    //,CURLOPT_FOLLOWLOCATION => true

));

//Ignore SSL certificate verification

curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);

curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);

//get response

$output = curl_exec($ch);

//Print error if any

if(curl_errno($ch))

{

    echo 'error:' . curl_error($ch);

}

curl_close($ch);

}

其中“$authKey = "XXXXXXXXXXX";”需要你输入你的密码,“$senderId = "IKOONK";”需要你输入你的 SenderID。当输入移动号码的时候需要指定国家代码 (比如,美国是 1,印度是 91 )。 
语法: 

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<?php

$message = "Hello World";

$mobile = "918112998787";

send_sms($mobile,$message);

?>

2. 使用 mandrill 发送邮件Mandrill 是一款强大的 SMTP 提供器。开发者倾向于使用一个第三方 SMTP provider 来获取更好的收件交付。 
下面的函数中,你需要把 “Mandrill.php” 放在同一个文件夹,作为 PHP 文件,这样就可以使用TA来发送邮件。 

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function send_email($to_email,$subject,$message1)

{

require_once 'Mandrill.php';

$apikey = 'XXXXXXXXXX'; //specify your api key here

$mandrill = new Mandrill($apikey);

$message = new stdClass();

$message->html = $message1;

$message->text = $message1;

$message->subject = $subject;

$message->from_email = "blog@koonk.com";//Sender Email

$message->from_name  = "KOONK";//Sender Name

$message->to = array(array("email" => $to_email));

$message->track_opens = true;

$response = $mandrill->messages->send($message);

}

$apikey = 'XXXXXXXXXX'; //specify your api key here”这里需要你指定你的 API 密钥(从 Mandrill 账户中获得)。 
语法: 

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<?php

$to = "abc@example.com";

$subject = "This is a test email";

$message = "Hello World!";

send_email($to,$subject,$message);

?>

为了达到最好的效果,最好按照 Mandrill 的教程去配置 DNS。 
3. PHP 函数:阻止 SQL 注入SQL 注入或者 SQLi 常见的攻击网站的手段,使用下面的代码可以帮助你防止这些工具。 

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function clean($input)

{

    if (is_array($input))

    {

        foreach ($input as $key => $val)

         {

            $output[$key] = clean($val);

            // $output[$key] = $this->clean($val);

        }

    }

    else

    {

        $output = (string) $input;

        // if magic quotes is on then use strip slashes

        if (get_magic_quotes_gpc())

        {

            $output = stripslashes($output);

        }

        // $output = strip_tags($output);

        $output = htmlentities($output, ENT_QUOTES, 'UTF-8');

    }

// return the clean text

    return $output;

}

语法: 

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<?php

$text = "

";

$text = clean($text);

echo $text;

?>

4. 检测用户位置使用下面的函数,可以检测用户是在哪个城市访问你的网站 

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function detect_city($ip) {

        $default = 'UNKNOWN';

        $curlopt_useragent = 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2) Gecko/20100115 Firefox/3.6 (.NET CLR 3.5.30729)';

        $url = 'http://ipinfodb.com/ip_locator.php?ip=' . urlencode($ip);

        $ch = curl_init();

        $curl_opt = array(

            CURLOPT_FOLLOWLOCATION  => 1,

            CURLOPT_HEADER      => 0,

            CURLOPT_RETURNTRANSFER  => 1,

            CURLOPT_USERAGENT   => $curlopt_useragent,

            CURLOPT_URL       => $url,

            CURLOPT_TIMEOUT         => 1,

            CURLOPT_REFERER         => 'http://' . $_SERVER['HTTP_HOST'],

        );

        curl_setopt_array($ch, $curl_opt);

        $content = curl_exec($ch);

        if (!is_null($curl_info)) {

            $curl_info = curl_getinfo($ch);

        }

        curl_close($ch);

        if ( preg_match('{

  • City : ([^<]*)

  • }i', $content, $regs) )  {

            $city = $regs[1];

        }

        if ( preg_match('{

  • State/Province : ([^<]*)

  • }i', $content, $regs) )  {

            $state = $regs[1];

        }

        if( $city!='' && $state!='' ){

          $location = $city . ', ' . $state;

          return $location;

        }else{

          return $default;

        }

    }

语法: 

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<?php

$ip = $_SERVER['REMOTE_ADDR'];

$city = detect_city($ip);

echo $city;

?>


5. 获取 Web 页面的源代码使用下面的函数,可以获取任意 Web 页面的 HTML 代码 

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function display_sourcecode($url)

{

$lines = file($url);

$output = "";

foreach ($lines as $line_num => $line) {

    // loop thru each line and prepend line numbers

    $output.= "Line #{$line_num} : " . htmlspecialchars($line) . "\n";

}

}

语法: 

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<?php

$url = "http://blog.koonk.com";

$source = display_sourcecode($url);

echo $source;

?>


6. 计算喜欢你的 Facebook 页面的用户

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function fb_fan_count($facebook_name)

{

    $data = json_decode(file_get_contents("https://graph.facebook.com/".$facebook_name));

    $likes = $data->likes;

    return $likes;

}

语法:

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<?php

$page = "koonktechnologies";

$count = fb_fan_count($page);

echo $count;

?>


7. 确定任意图片的主导颜色

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function dominant_color($image)

{

$i = imagecreatefromjpeg($image);

for ($x=0;$x<imagesx($i);$x++) {

    for ($y=0;$y<imagesy($i);$y++) {

        $rgb = imagecolorat($i,$x,$y);

        $r   = ($rgb >> 16) & 0xFF;

        $g   = ($rgb >>  & 0xFF;

        $b   = $rgb & 0xFF;

        $rTotal += $r;

        $gTotal += $g;

        $bTotal += $b;

        $total++;

    }

}

$rAverage = round($rTotal/$total);

$gAverage = round($gTotal/$total);

$bAverage = round($bTotal/$total);

}


8. whois 查询使用下面的函数可以获取任何域名用户的完整细节 

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function whois_query($domain) {

    // fix the domain name:

    $domain = strtolower(trim($domain));

    $domain = preg_replace('/^http:\/\//i', '', $domain);

    $domain = preg_replace('/^www\./i', '', $domain);

    $domain = explode('/', $domain);

    $domain = trim($domain[0]);

    // split the TLD from domain name

    $_domain = explode('.', $domain);

    $lst = count($_domain)-1;

    $ext = $_domain[$lst];

    // You find resources and lists

    // like these on wikipedia:

    //

    // http://de.wikipedia.org/wiki/Whois

    //

    $servers = array(

        "biz" => "whois.neulevel.biz",

        "com" => "whois.internic.net",

        "us" => "whois.nic.us",

        "coop" => "whois.nic.coop",

        "info" => "whois.nic.info",

        "name" => "whois.nic.name",

        "net" => "whois.internic.net",

        "gov" => "whois.nic.gov",

        "edu" => "whois.internic.net",

        "mil" => "rs.internic.net",

        "int" => "whois.iana.org",

        "ac" => "whois.nic.ac",

        "ae" => "whois.uaenic.ae",

        "at" => "whois.ripe.net",

        "au" => "whois.aunic.net",

        "be" => "whois.dns.be",

        "bg" => "whois.ripe.net",

        "br" => "whois.registro.br",

        "bz" => "whois.belizenic.bz",

        "ca" => "whois.cira.ca",

        "cc" => "whois.nic.cc",

        "ch" => "whois.nic.ch",

        "cl" => "whois.nic.cl",

        "cn" => "whois.cnnic.net.cn",

        "cz" => "whois.nic.cz",

        "de" => "whois.nic.de",

        "fr" => "whois.nic.fr",

        "hu" => "whois.nic.hu",

        "ie" => "whois.domainregistry.ie",

        "il" => "whois.isoc.org.il",

        "in" => "whois.ncst.ernet.in",

        "ir" => "whois.nic.ir",

        "mc" => "whois.ripe.net",

        "to" => "whois.tonic.to",

        "tv" => "whois.tv",

        "ru" => "whois.ripn.net",

        "org" => "whois.pir.org",

        "aero" => "whois.information.aero",

        "nl" => "whois.domain-registry.nl"

    );

    if (!isset($servers[$ext])){

        die('Error: No matching nic server found!');

    }

    $nic_server = $servers[$ext];

    $output = '';

    // connect to whois server:

    if ($conn = fsockopen ($nic_server, 43)) {

        fputs($conn, $domain."\r\n");

        while(!feof($conn)) {

            $output .= fgets($conn,128);

        }

        fclose($conn);

    }

    else { die('Error: Could not connect to ' . $nic_server . '!'); }

    return $output;

}


语法: 

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<?php

$domain = "http://www.blog.koonk.com";

$result = whois_query($domain);

print_r($result);

?>


9. 验证邮箱地址有时候,当在网站填写表单,用户可能会输入错误的邮箱地址,这个函数可以验证邮箱地址是否有效。 

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function is_validemail($email)

{

$check = 0;

if(filter_var($email,FILTER_VALIDATE_EMAIL))

{

$check = 1;

}

return $check;

}

语法:

<?php

$email = "blog@koonk.com";

$check = is_validemail($email);

echo $check;

// If the output is 1, then email is valid.

?>

10. 获取用户的真实  IP

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function getRealIpAddr() 

    if (!emptyempty($_SERVER['HTTP_CLIENT_IP'])) 

    

        $ip=$_SERVER['HTTP_CLIENT_IP']; 

    

    elseif (!emptyempty($_SERVER['HTTP_X_FORWARDED_FOR'])) 

    //to check ip is pass from proxy 

    

        $ip=$_SERVER['HTTP_X_FORWARDED_FOR']; 

    

    else 

    

        $ip=$_SERVER['REMOTE_ADDR']; 

    

    return $ip; 

}

语法:

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<?php

$ip = getRealIpAddr();

echo $ip;

?>


11. 转换 URL:从字符串变成超链接如果你正在开发论坛,博客或者是一个常规的表单提交,很多时候都要用户访问一个网站。使用这个函数,URL 字符串就可以自动的转换为超链接。 

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function makeClickableLinks($text)

 $text = eregi_replace('(((f|ht){1}tp://)[-a-zA-Z0-9@:%_+.~#?&//=]+)', 

 '\1', $text); 

 $text = eregi_replace('([[:space:]()[{}])(www.[-a-zA-Z0-9@:%_+.~#?&//=]+)', 

 '\1\2', $text); 

 $text = eregi_replace('([_.0-9a-z-]+@([0-9a-z][0-9a-z-]+.)+[a-z]{2,3})', 

 '\1', $text); 

return $text; 

}

语法:

<?php

$text = "This is my first post on http://blog.koonk.com";

$text = makeClickableLinks($text);

echo $text;

?>


12. 阻止多个 IP 访问你的网站这个代码片段可以方便你禁止某些特定的 IP 地址访问你的网站 

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if ( !file_exists('blocked_ips.txt') ) {

 $deny_ips = array(

  '127.0.0.1',

  '192.168.1.1',

  '83.76.27.9',

  '192.168.1.163'

 );

} else {

 $deny_ips = file('blocked_ips.txt');

}

// read user ip adress:

$ip = isset($_SERVER['REMOTE_ADDR']) ? trim($_SERVER['REMOTE_ADDR']) : '';

// search current IP in $deny_ips array

if ( (array_search($ip, $deny_ips))!== FALSE ) {

 // address is blocked:

 echo 'Your IP adress ('.$ip.') was blocked!';

 exit;

}


13. 强制性文件下载如果你需要下载特定的文件而不用另开新窗口,下面的代码片段可以帮助你。 

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function force_download($file)

{

    $dir      = "../log/exports/";

    if ((isset($file))&&(file_exists($dir.$file))) {

       header("Content-type: application/force-download");

       header('Content-Disposition: inline; filename="' . $dir.$file . '"');

       header("Content-Transfer-Encoding: Binary");

       header("Content-length: ".filesize($dir.$file));

       header('Content-Type: application/octet-stream');

       header('Content-Disposition: attachment; filename="' . $file . '"');

       readfile("$dir$file");

    } else {

       echo "No file selected";

    }

}


语法: 

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<php

force_download("image.jpg");

?>


14. 创建 JSON 数据使用下面的 PHP 片段可以创建 JSON 数据,可以方便你创建移动应用的 Web 服务 

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$json_data = array ('id'=>1,'name'=>"Mohit");

echo json_encode($json_data);


15. 压缩 zip 文件使用下面的 PHP 片段可以即时压缩 zip 文件 

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function create_zip($files = array(),$destination = '',$overwrite = false) { 

    //if the zip file already exists and overwrite is false, return false 

    if(file_exists($destination) && !$overwrite) { return false; } 

    //vars 

    $valid_files = array(); 

    //if files were passed in... 

    if(is_array($files)) { 

        //cycle through each file 

        foreach($files as $file) { 

            //make sure the file exists 

            if(file_exists($file)) { 

                $valid_files[] = $file; 

            

        

    

    //if we have good files... 

    if(count($valid_files)) { 

        //create the archive 

        $zip = new ZipArchive(); 

        if($zip->open($destination,$overwrite ? ZIPARCHIVE::OVERWRITE : ZIPARCHIVE::CREATE) !== true) { 

            return false; 

        

        //add the files 

        foreach($valid_files as $file) { 

            $zip->addFile($file,$file); 

        

        //debug 

        //echo 'The zip archive contains ',$zip->numFiles,' files with a status of ',$zip->status; 

        //close the zip -- done! 

        $zip->close(); 

        //check to make sure the file exists 

        return file_exists($destination); 

    

    else 

    

        return false; 

    

}

语法:

<?php

$files=array('file1.jpg', 'file2.jpg', 'file3.gif'); 

create_zip($files, 'myzipfile.zip', true);

?>


16. 解压文件

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function unzip($location,$newLocation)

{

        if(exec("unzip $location",$arr)){

            mkdir($newLocation);

            for($i = 1;$i< count($arr);$i++){

                $file = trim(preg_replace("~inflating: ~","",$arr[$i]));

                copy($location.'/'.$file,$newLocation.'/'.$file);

                unlink($location.'/'.$file);

            }

            return TRUE;

        }else{

            return FALSE;

        }

}


语法: 

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<?php

unzip('test.zip','unziped/test'); //File would be unzipped in unziped/test folder

?>


17. 缩放图片

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function resize_image($filename, $tmpname, $xmax, $ymax) 

    $ext = explode(".", $filename); 

    $ext = $ext[count($ext)-1]; 

    if($ext == "jpg" || $ext == "jpeg") 

        $im = imagecreatefromjpeg($tmpname); 

    elseif($ext == "png") 

        $im = imagecreatefrompng($tmpname); 

    elseif($ext == "gif") 

        $im = imagecreatefromgif($tmpname); 

    $x = imagesx($im); 

    $y = imagesy($im); 

    if($x <= $xmax && $y <= $ymax) 

        return $im; 

    if($x >= $y) { 

        $newx = $xmax; 

        $newy = $newx * $y / $x; 

    

    else { 

        $newy = $ymax; 

        $newx = $x / $y * $newy; 

    

    $im2 = imagecreatetruecolor($newx, $newy); 

    imagecopyresized($im2, $im, 0, 0, 0, 0, floor($newx), floor($newy), $x, $y); 

    return $im2;  

}


18. 使用 mail() 发送邮件 
 
之前我们提供了如何使用 Mandrill 发送邮件的 PHP 代码片段,但是如果你不想使用第三方服务,那么可以使用下面的 PHP 代码片段。 

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function send_mail($to,$subject,$body)

{

$headers = "From: KOONK\r\n";

$headers .= "Reply-To: blog@koonk.com\r\n";

$headers .= "Return-Path: blog@koonk.com\r\n";

$headers .= "X-Mailer: PHP5\n";

$headers .= 'MIME-Version: 1.0' . "\n";

$headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";

mail($to,$subject,$body,$headers);

}

语法:

<?php

$to = "admin@koonk.com";

$subject = "This is a test mail";

$body = "Hello World!";

send_mail($to,$subject,$body);

?>

19. 把秒转换成天数,小时数和分钟

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function secsToStr($secs) {

    if($secs>=86400){$days=floor($secs/86400);$secs=$secs%86400;$r=$days.' day';if($days<>1){$r.='s';}if($secs>0){$r.=', ';}}

    if($secs>=3600){$hours=floor($secs/3600);$secs=$secs%3600;$r.=$hours.' hour';if($hours<>1){$r.='s';}if($secs>0){$r.=', ';}}

    if($secs>=60){$minutes=floor($secs/60);$secs=$secs%60;$r.=$minutes.' minute';if($minutes<>1){$r.='s';}if($secs>0){$r.=', ';}}

    $r.=$secs.' second';if($secs<>1){$r.='s';}

    return $r;

}

语法:

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<?php

$seconds = "56789";

$output = secsToStr($seconds);

echo $output;

?>

20. 数据库连接连接 MySQL 数据库 

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<?php

$DBNAME = 'koonk';

$HOST = 'localhost';

$DBUSER = 'root';

$DBPASS = 'koonk';

$CONNECT = mysql_connect($HOST,$DBUSER,$DBPASS);

if(!$CONNECT)

{

    echo 'MySQL Error: '.mysql_error();

}

$SELECT = mysql_select_db($DBNAME);

if(!$SELECT)

{

    echo 'MySQL Error: '.mysql_error();

}

?>

21. 目录清单使用下面的 PHP 代码片段可以在一个目录中列出所有文件和文件夹 

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function list_files($dir)

{

    if(is_dir($dir))

    {

        if($handle = opendir($dir))

        {

            while(($file = readdir($handle)) !== false)

            {

                if($file != "." && $file != ".." && $file != "Thumbs.db"/*pesky windows, images..*/)

                {

                    echo ''.$file.''."\n";

                }

            }

            closedir($handle);

        }

    }

}


语法: 

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<?php

    list_files("images/"); //This will list all files of images folder

?>


22. 检测用户语言使用下面的 PHP 代码片段可以检测用户浏览器所使用的语言 

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function get_client_language($availableLanguages, $default='en'){

    if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {

        $langs=explode(',',$_SERVER['HTTP_ACCEPT_LANGUAGE']);

        foreach ($langs as $value){

            $choice=substr($value,0,2);

            if(in_array($choice, $availableLanguages)){

                return $choice;

            }

        }

    }

    return $default;

}


23. 查看 CSV 文件

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function readCSV($csvFile){

    $file_handle = fopen($csvFile, 'r');

    while (!feof($file_handle) ) {

        $line_of_text[] = fgetcsv($file_handle, 1024);

    }

    fclose($file_handle);

    return $line_of_text;

}

语法:

<?php

$csvFile = "test.csv";

$csv = readCSV($csvFile);

$a = csv[0][0]; // This will get value of Column 1 & Row 1

?>


24. 从 PHP 数据创建 CSV 文件

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function generateCsv($data, $delimiter = ',', $enclosure = '"') {

   $handle = fopen('php://temp', 'r+');

   foreach ($data as $line) {

           fputcsv($handle, $line, $delimiter, $enclosure);

   }

   rewind($handle);

   while (!feof($handle)) {

           $contents .= fread($handle, 8192);

   }

   fclose($handle);

   return $contents;

}

语法:

<?php

$data[0] = "apple";

$data[1] = "oranges";

generateCsv($data, $delimiter = ',', $enclosure = '"');

?>


25. 解析 XML 数据

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$xml_string="

        ben

        A

        h2o

        K

";

//load the xml string using simplexml function

$xml = simplexml_load_string($xml_string);

//loop through the each node of molecule

foreach ($xml->molecule as $record)

{

   //attribute are accessted by

   echo $record['name'], '  ';

   //node are accessted by -> operator

   echo $record->symbol, '  ';

   echo $record->code, '';

}


26. 解析 JSON 数据

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$json_string='{"id":1,"name":"rolf","country":"russia","office":["google","oracle"]} ';

$obj=json_decode($json_string);

//print the parsed data

echo $obj->name; //displays rolf

echo $obj->office[0]; //displays google


27. 获取当前页面 URL这个 PHP 片段可以帮助你让用户登录后直接跳转到之前浏览的页面 

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function current_url()

{

$url = "http://" . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];

$validURL = str_replace("&", "&", $url);

return validURL;

}


语法: 

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<?php

echo "Currently you are on: ".current_url();

?>


28. 从任意的 Twitter 账号获取最新的 Tweet 

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function my_twitter($username)

{

     $no_of_tweets = 1;

     $feed = "http://search.twitter.com/search.atom?q=from:" . $username . "&rpp=" . $no_of_tweets;

     $xml = simplexml_load_file($feed);

    foreach($xml->children() as $child) {

        foreach ($child as $value) {

            if($value->getName() == "link") $link = $value['href'];

            if($value->getName() == "content") {

                $content = $value . "";

        echo '

'.$content.'  

';

            }   

        }

    }   

}

语法:

<?php

$handle = "koonktech";

my_twitter($handle);

?>


29. 转发数量使用这个 PHP 片段可以检测你的页面 URL 有多少转发数量 

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function tweetCount($url) {

    $content = file_get_contents("http://api.tweetmeme.com/url_info?url=".$url);

    $element = new SimpleXmlElement($content);

    $retweets = $element->story->url_count;

    if($retweets){

        return $retweets;

    } else {

        return 0;

    }

}

语法:

<?php

$url = "http://blog.koonk.com";

$count = tweetCount($url);

return $count;

?>


30. 计算两个日期的差

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<?php

$date1 = date( 'Y-m-d' );

$date2 = "2015-12-04";

$diff = abs(strtotime($date2) - strtotime($date1));

$years = floor($diff / (365*60*60*24));

$months = floor(($diff - $years * 365*60*60*24) / (30*60*60*24));

$days = floor(($diff - $years * 365*60*60*24 - $months*30*60*60*24)/ (60*60*24));

printf("%d years, %d months, %d days\n", $years, $months, $days);

-------------------------------------------------------- OR

$date1 = new DateTime("2007-03-24");

$date2 = new DateTime("2009-06-26");

$interval = $date1->diff($date2);

echo "difference " . $interval->y . " years, " . $interval->m." months, ".$interval->d." days ";

// shows the total amount of days (not divided into years, months and days like above)

echo "difference " . $interval->days . " days ";

-------------------------------------------------------- OR

/**

 * Calculate differences between two dates with precise semantics. Based on PHPs DateTime::diff()

 * implementation by Derick Rethans. Ported to PHP by Emil H, 2011-05-02. No rights reserved.

 *

 * See here for original code:

 * http://svn.php.net/viewvc/php/php-src/trunk/ext/date/lib/tm2unixtime.c?revision=302890&view=markup

 * http://svn.php.net/viewvc/php/php-src/trunk/ext/date/lib/interval.c?revision=298973&view=markup

 */

function _date_range_limit($start, $end, $adj, $a, $b, $result)

{

    if ($result[$a] < $start) {

        $result[$b] -= intval(($start - $result[$a] - 1) / $adj) + 1;

        $result[$a] += $adj * intval(($start - $result[$a] - 1) / $adj + 1);

    }

    if ($result[$a] >= $end) {

        $result[$b] += intval($result[$a] / $adj);

        $result[$a] -= $adj * intval($result[$a] / $adj);

    }

    return $result;

}

function _date_range_limit_days($base, $result)

{

    $days_in_month_leap = array(31, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);

    $days_in_month = array(31, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);

    _date_range_limit(1, 13, 12, "m", "y", &$base);

    $year = $base["y"];

    $month = $base["m"];

    if (!$result["invert"]) {

        while ($result["d"] < 0) {

            $month--;

            if ($month < 1) {

                $month += 12;

                $year--;

            }

            $leapyear = $year % 400 == 0 || ($year % 100 != 0 && $year % 4 == 0);

            $days = $leapyear ? $days_in_month_leap[$month] : $days_in_month[$month];

            $result["d"] += $days;

            $result["m"]--;

        }

    } else {

        while ($result["d"] < 0) {

            $leapyear = $year % 400 == 0 || ($year % 100 != 0 && $year % 4 == 0);

            $days = $leapyear ? $days_in_month_leap[$month] : $days_in_month[$month];

            $result["d"] += $days;

            $result["m"]--;

            $month++;

            if ($month > 12) {

                $month -= 12;

                $year++;

            }

        }

    }

    return $result;

}

function _date_normalize($base, $result)

{

    $result = _date_range_limit(0, 60, 60, "s", "i", $result);

    $result = _date_range_limit(0, 60, 60, "i", "h", $result);

    $result = _date_range_limit(0, 24, 24, "h", "d", $result);

    $result = _date_range_limit(0, 12, 12, "m", "y", $result);

    $result = _date_range_limit_days(&$base, &$result);

    $result = _date_range_limit(0, 12, 12, "m", "y", $result);

    return $result;

}

/**

 * Accepts two unix timestamps.

 */

function _date_diff($one, $two)

{

    $invert = false;

    if ($one > $two) {

        list($one, $two) = array($two, $one);

        $invert = true;

    }

    $key = array("y", "m", "d", "h", "i", "s");

    $a = array_combine($key, array_map("intval", explode(" ", date("Y m d H i s", $one))));

    $b = array_combine($key, array_map("intval", explode(" ", date("Y m d H i s", $two))));

    $result = array();

    $result["y"] = $b["y"] - $a["y"];

    $result["m"] = $b["m"] - $a["m"];

    $result["d"] = $b["d"] - $a["d"];

    $result["h"] = $b["h"] - $a["h"];

    $result["i"] = $b["i"] - $a["i"];

    $result["s"] = $b["s"] - $a["s"];

    $result["invert"] = $invert ? 1 : 0;

    $result["days"] = intval(abs(($one - $two)/86400));

    if ($invert) {

        _date_normalize(&$a, &$result);

    } else {

        _date_normalize(&$b, &$result);

    }

    return $result;

}

$date = "2014-12-04 19:37:22";

echo '

';

print_r( _date_diff( strtotime($date), time() ) );

echo '';

?>

31. 删除文件夹内容

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function Delete($path)

{

    if (is_dir($path) === true)

    {

        $files = array_diff(scandir($path), array('.', '..'));

        foreach ($files as $file)

        {

            Delete(realpath($path) . '/' . $file);

        }

        return rmdir($path);

    }

    else if (is_file($path) === true)

    {

        return unlink($path);

    }

    return false;

}


语法: 

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<?php

$path = "images/";

Delete($path); // This will delete images folder along with its contents.

?>


32. 搜索和高亮字符串中的关键字

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function highlighter_text($text, $words)

{

    $split_words = explode( " " , $words );

    foreach($split_words as $word)

    {

        $color = "#4285F4";

        $text = preg_replace("|($word)|Ui" ,

            "$1" , $text );

    }

    return $text;

}

语法: 

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<?php

$string = "I like chocolates and I like apples";

$words = "apple";

echo highlighter_text($string ,$words);

?>


33. 写入文件

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<?

$filename = 'blog.csv';

$fp = fopen($filename, 'w');

$output = " Hello ";

$output .= " World! ";

$output .= "\r\n";

fputs($fp, $output);

fclose($fp);

?>


34. 根据 URL 下载图片

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function imagefromURL($image,$rename)

{

$ch = curl_init($image);

curl_setopt($ch, CURLOPT_HEADER, 0);

curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

curl_setopt($ch, CURLOPT_BINARYTRANSFER,1);

$rawdata=curl_exec ($ch);

curl_close ($ch);

$fp = fopen("$rename",'w');

fwrite($fp, $rawdata);

fclose($fp);

}


语法: 

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<?php

$url = "http://koonk.com/images/logo.png";

$rename = "koonk.png";

imagefromURL($url,$rename);

?>


35. 检测 URL 是否有效

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function isvalidURL($url)

{

$check = 0;

if (filter_var($url, FILTER_VALIDATE_URL) !== false) {

  $check = 1;

}

return $check;

}

语法:

<?php

$url = "http://koonk.com";

$check = checkvalidURL($url);

echo $check; //if returns 1 then URL is valid.

?>


36. 生成二维码

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function qr_code($data, $type = "TXT", $size ='150', $ec='L', $margin='0') 

{

     $types = array("URL" =--> "http://", "TEL" => "TEL:", "TXT"=>"", "EMAIL" => "MAILTO:");

    if(!in_array($type,array("URL", "TEL", "TXT", "EMAIL")))

    {

        $type = "TXT";

    }

    if (!preg_match('/^'.$types[$type].'/', $data))

    {

        $data = str_replace("\\", "", $types[$type]).$data;

    }

    $ch = curl_init();

    $data = urlencode($data);

    curl_setopt($ch, CURLOPT_URL, 'http://chart.apis.google.com/chart');

    curl_setopt($ch, CURLOPT_POST, true);

    curl_setopt($ch, CURLOPT_POSTFIELDS, 'chs='.$size.'x'.$size.'&cht=qr&chld='.$ec.'|'.$margin.'&chl='.$data);

    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

    curl_setopt($ch, CURLOPT_HEADER, false);

    curl_setopt($ch, CURLOPT_TIMEOUT, 30);

    $response = curl_exec($ch);

    curl_close($ch);

    return $response;

}


语法: 

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<?php

header("Content-type: image/png");

echo qr_code("http://koonk.com", "URL");

?>


37. 计算两个地图坐标之间的距离

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function getDistanceBetweenPointsNew($latitude1, $longitude1, $latitude2, $longitude2) {

    $theta = $longitude1 - $longitude2;

    $miles = (sin(deg2rad($latitude1)) * sin(deg2rad($latitude2))) + (cos(deg2rad($latitude1)) * cos(deg2rad($latitude2)) * cos(deg2rad($theta)));

    $miles = acos($miles);

    $miles = rad2deg($miles);

    $miles = $miles * 60 * 1.1515;

    $feet = $miles * 5280;

    $yards = $feet / 3;

    $kilometers = $miles * 1.609344;

    $meters = $kilometers * 1000;

    return compact('miles','feet','yards','kilometers','meters');

}


语法: 

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<?php

$point1 = array('lat' => 40.770623, 'long' => -73.964367);

$point2 = array('lat' => 40.758224, 'long' => -73.917404);

$distance = getDistanceBetweenPointsNew($point1['lat'], $point1['long'], $point2['lat'], $point2['long']);

foreach ($distance as $unit => $value) {

    echo $unit.': '.number_format($value,4).'';

}

?>


38. 获取一个特定话题标签的所有 Tweets

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function getTweets($hash_tag) {

    $url = 'http://search.twitter.com/search.atom?q='.urlencode($hash_tag) ;

    echo "

Connecting to $url ...

";

    $ch = curl_init($url);

    curl_setopt ($ch, CURLOPT_RETURNTRANSFER, TRUE);

    $xml = curl_exec ($ch);

    curl_close ($ch);

    //If you want to see the response from Twitter, uncomment this next part out:

    //echo "

Response:

";

    //echo "

".htmlspecialchars($xml)."
";

    $affected = 0;

    $twelement = new SimpleXMLElement($xml);

    foreach ($twelement->entry as $entry) {

        $text = trim($entry->title);

        $author = trim($entry->author->name);

        $time = strtotime($entry->published);

        $id = $entry->id;

        echo "

Tweet from ".$author.": ".$text."  Posted ".date('n/j/y g:i a',$time)."

";

    }

    return true ;

}


39. 添加 th,st,nd 或者 rd 作为数字的后缀

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Friday the 13th

function ordinal($cdnl){

    $test_c = abs($cdnl) % 10;

    $ext = ((abs($cdnl) %100 < 21 && abs($cdnl) %100 > 4) ? 'th'

            : (($test_c < 4) ? ($test_c < 3) ? ($test_c < 2) ? ($test_c < 1)

            ? 'th' : 'st' : 'nd' : 'rd' : 'th'));

    return $cdnl.$ext;

}

语法: 

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<?php

$number = 10;

echo ordinal($number); //output is 10th

?>


40. 限制文件下载的速度

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<?php

// local file that should be send to the client

$local_file = 'test-file.zip';

// filename that the user gets as default

$download_file = 'your-download-name.zip';

// set the download rate limit (=> 20,5 kb/s)

$download_rate = 20.5;

if(file_exists($local_file) && is_file($local_file)) {

    // send headers

    header('Cache-control: private');

    header('Content-Type: application/octet-stream');

    header('Content-Length: '.filesize($local_file));

    header('Content-Disposition: filename='.$download_file);

    // flush content

    flush();   

    // open file stream

    $file = fopen($local_file, "r");   

    while(!feof($file)) {

        // send the current file part to the browser

        print fread($file, round($download_rate * 1024));   

        // flush the content to the browser

        flush();

        // sleep one second

        sleep(1);   

    }   

    // close file stream

    fclose($file);}

else {

    die('Error: The file '.$local_file.' does not exist!');

}

?>


41. 把文本转换成图片

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<?php

header("Content-type: image/png");

$string = $_GET['text'];

$im = imagecreatefrompng("images/button.png");

$color = imagecolorallocate($im, 255, 255, 255);

$px = (imagesx($im) - 7.5 * strlen($string)) / 2;

$py = 9;

$fontSize = 1;

imagestring($im, fontSize, $px, $py, $string, $color);

imagepng($im);

imagedestroy($im);

?>


42. 获取远程文件的大小 

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function remote_filesize($url, $user = "", $pw = "")

{

    ob_start();

    $ch = curl_init($url);

    curl_setopt($ch, CURLOPT_HEADER, 1);

    curl_setopt($ch, CURLOPT_NOBODY, 1);

    if(!empty($user) && !empty($pw))

    {

        $headers = array('Authorization: Basic ' .  base64_encode("$user:$pw"));

        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

    }

    $ok = curl_exec($ch);

    curl_close($ch);

    $head = ob_get_contents();

    ob_end_clean();

    $regex = '/Content-Length:\s([0-9].+?)\s/';

    $count = preg_match($regex, $head, $matches);

    return isset($matches[1]) ? $matches[1] : "unknown";

}


语法: 

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<?php

$file = "http://koonk.com/images/logo.png";

$size = remote_filesize($url);

echo $size;

?>


43. 使用 imagebrick 进行 pdf 到图像的转换

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<?php

$pdf_file   = './pdf/demo.pdf';

$save_to    = './jpg/demo.jpg';     //make sure that apache has permissions to write in this folder! (common problem)

//execute ImageMagick command 'convert' and convert PDF to JPG with applied settings

exec('convert "'.$pdf_file.'" -colorspace RGB -resize 800 "'.$save_to.'"', $output, $return_var);

if($return_var == 0) {              //if exec successfuly converted pdf to jpg

    print "Conversion OK";

}

else print "Conversion failed.".$output;

?>


44. 使用 tinyurl 生成短网址

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function get_tiny_url($url) 

    $ch = curl_init(); 

    $timeout = 5; 

    curl_setopt($ch,CURLOPT_URL,'http://tinyurl.com/api-create.php?url='.$url); 

    curl_setopt($ch,CURLOPT_RETURNTRANSFER,1); 

    curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,$timeout); 

    $data = curl_exec($ch); 

    curl_close($ch); 

    return $data; 

}


语法: 

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<?php

$url = "http://blog.koonk.com/2015/07/Hello-World";

$tinyurl = get_tiny_url($url);

echo $tinyurl;

?>


45. youtube 下载链接生成器使用下面的 PHP 片段可以让你的用户下载 Youtube 视频 

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function str_between($string, $start, $end)

{

$string = " ".$string; $ini = strpos($string,$start); if ($ini == 0) return ""; $ini += strlen($start); $len = strpos($string,$end,$ini) - $ini; return substr($string,$ini,$len); }

function get_youtube_download_link(){

    $youtube_link = $_GET['youtube'];

    $youtube_page = file_get_contents($youtube_link);

    $v_id = str_between($youtube_page, "&video_id=", "&");

    $t_id = str_between($youtube_page, "&t=", "&");

    $flv_link = "http://www.youtube.com/get_video?video_id=$v_id&t=$t_id";

    $hq_flv_link = "http://www.youtube.com/get_video?video_id=$v_id&t=$t_id&fmt=6";

    $mp4_link = "http://www.youtube.com/get_video?video_id=$v_id&t=$t_id&fmt=18";

    $threegp_link = "http://www.youtube.com/get_video?video_id=$v_id&t=$t_id&fmt=17";

    echo "\t\tDownload (right-click > save as):\n\t\t";

    echo "FLV\n\t\t";

    echo "HQ FLV (if available)\n\t\t";

    echo "MP4\n\t\t";

    echo "3GP\n";

}


46. Facebook 样式的时间戳

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Facebook (x mins age, y hours ago etc)

function nicetime($date)

{

    if(empty($date)) {

        return "No date provided";

    }

    $periods         = array("second", "minute", "hour", "day", "week", "month", "year", "decade");

    $lengths         = array("60","60","24","7","4.35","12","10");

    $now             = time();

    $unix_date         = strtotime($date);

       // check validity of date

    if(empty($unix_date)) {   

        return "Bad date";

    }

    // is it future date or past date

    if($now > $unix_date) {   

        $difference     = $now - $unix_date;

        $tense         = "ago";

    } else {

        $difference     = $unix_date - $now;

        $tense         = "from now";

    }

    for($j = 0; $difference >= $lengths[$j] && $j < count($lengths)-1; $j++) {

        $difference /= $lengths[$j];

    }

    $difference = round($difference);

    if($difference != 1) {

        $periods[$j].= "s";

    }

    return "$difference $periods[$j] {$tense}";

}

语法: 

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<?php

$date = "2015-07-05 03:45";

$result = nicetime($date); // 2 days ago

?>

?

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function is_spam($text$file$split ':'$regex = false){

    $handle fopen($file'rb');

    $contents fread($handlefilesize($file));

    fclose($handle);

    $lines explode("n"$contents);

    $arr array();

    foreach($lines as $line){

        list($word$count) = explode($split$line);

        if($regex)

            $arr[$word] = $count;

        else

            $arr[preg_quote($word)] = $count;

    }

    preg_match_all("~".implode('|'array_keys($arr))."~"$text$matches);

    $temp array();

    foreach($matches[0] as $match){

        if(!in_array($match$temp)){

            $temp[$match] = $temp[$match] + 1;

            if($temp[$match] >= $arr[$word])

                return true;

        }

    }

    return false;

}

$file 'spam.txt';

$str 'This string has cat, dog word';

if(is_spam($str$file))

    echo 'this is spam';

else

    echo 'this is not spam';

输出:

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ab:3

dog:3

cat:2

monkey:2

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function randomColor() {

    $str '#';

    for($i = 0 ; $i < 6 ; $i++) {

        $randNum = rand(0 , 15);

        switch ($randNum) {

            case 10: $randNum 'A'break;

            case 11: $randNum 'B'break;

            case 12: $randNum 'C'break;

            case 13: $randNum 'D'break;

            case 14: $randNum 'E'break;

            case 15: $randNum 'F'break;

        }

        $str .= $randNum;

    }

    return $str;

}

$color = randomColor();

?

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set_time_limit(0);

// Supports all file types

// URL Here:

$url 'http://somsite.com/some_video.flv';

$pi pathinfo($url);

$ext $pi['extension'];

$name $pi['filename'];

// create a new cURL resource

$ch = curl_init();

// set URL and other appropriate options

curl_setopt($ch, CURLOPT_URL, $url);

curl_setopt($ch, CURLOPT_HEADER, false);

curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);

curl_setopt($ch, CURLOPT_AUTOREFERER, true);

curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);

curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

// grab URL and pass it to the browser

$opt = curl_exec($ch);

// close cURL resource, and free up system resources

curl_close($ch);

$saveFile $name.'.'.$ext;

if(preg_match("/[^0-9a-z._-]/i"$saveFile))

$saveFile = md5(microtime(true)).'.'.$ext;

$handle fopen($saveFile'wb');

fwrite($handle$opt);

fclose($handle);

?

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function page_rank($page$type 'alexa'){

    switch($type){

        case 'alexa':

            $url 'http://alexa.com/siteinfo/';

            $handle fopen($url.$page'r');

            break;

        case 'google':

            $url 'http://google.com/search?client=navclient-auto&ch=6-1484155081&features=Rank&q=info:';

            $handle fopen($url.'http://'.$page'r');

            break;

    }

    $content = stream_get_contents($handle);

    fclose($handle);

    $content = preg_replace("~(n|t|ss+)~",''$content);

    switch($type){

        case 'alexa':

            if(preg_match('~

(.+?)+?>

~im',$content,$matches)){

                return $matches[2];

            }else{

            return FALSE;

            }

            break;

        case 'google':

            $rank explode(':',$content);

            if($rank[2] != '')

                return $rank[2];

            else

                return FALSE;

            break;

        default:

            return FALSE;

            break;

    }

}

// Alexa Page Rank:

echo 'Alexa Rank: '.page_rank('techug.com');

echo '

';

// Google Page Rank

echo 'Google Rank: '.page_rank('techug.com''google');

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$filename $_GET['file']; //Get the fileid from the URL

// Query the file ID

$query = sprintf("SELECT * FROM tableName WHERE id = '%s'",mysql_real_escape_string($filename));

$sql = mysql_query($query);

if(mysql_num_rows($sql) > 0){

    $row = mysql_fetch_array($sql);

    // Set some headers

    header("Pragma: public");

    header("Expires: 0");

    header("Cache-Control: must-revalidate, post-check=0, pre-check=0");

    header("Content-Type: application/force-download");

    header("Content-Type: application/octet-stream");

    header("Content-Type: application/download");

    header("Content-Disposition: attachment; filename=".basename($row['FileName']).";");

    header("Content-Transfer-Encoding: binary");

    header("Content-Length: ".filesize($row['FileName']));

    @readfile($row['FileName']);

    exit(0);

}else{

    header("Location: /");

    exit;

}

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$gravatar_link 'http://www.gravatar.com/avatar/' . md5($comment_author_email) . '?s=32';

echo '';img>;

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$ch = curl_init();

curl_setopt($ch,CURLOPT_URL,'https://feedburner.google.com/api/awareness/1.0/GetFeedData?id=7qkrmib4r9rscbplq5qgadiiq4');

curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);

curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,2);

$content = curl_exec($ch);

$subscribers = get_match('/circulation="(.*)"/isU',$content);

curl_close($ch);

?

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function ago($time)

{

    $periods array("second""minute""hour""day""week""month""year""decade");

    $lengths array("60","60","24","7","4.35","12","10");

    $now = time();

    $difference $now $time;

    $tense "ago";

    for($j = 0; $difference >= $lengths[$j] && $j count($lengths)-1; $j++) {

        $difference /= $lengths[$j];

    }

    $difference round($difference);

    if($difference != 1) {

        $periods[$j].= "s";

    }

    return "$difference $periods[$j] 'ago' ";

}

?

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$filename"test.jpg";

list($w$h$type$attr) = getimagesize($filename);

$src_im = imagecreatefromjpeg($filename);

$src_x '0'// begin x

$src_y '0'// begin y

$src_w '100'// width

$src_h '100'// height

$dst_x '0'// destination x

$dst_y '0'// destination y

$dst_im = imagecreatetruecolor($src_w$src_h);

$white = imagecolorallocate($dst_im, 255, 255, 255);

imagefill($dst_im, 0, 0, $white);

imagecopy($dst_im$src_im$dst_x$dst_y$src_x$src_y$src_w$src_h);

header("Content-type: image/png");

imagepng($dst_im);

imagedestroy($dst_im);

?

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function Visit($url){

    $agent "Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)";$ch=curl_init();

    curl_setopt ($ch, CURLOPT_URL,$url );

    curl_setopt($ch, CURLOPT_USERAGENT, $agent);

    curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);

    curl_setopt ($ch,CURLOPT_VERBOSE,false);

    curl_setopt($ch, CURLOPT_TIMEOUT, 5);

    curl_setopt($ch,CURLOPT_SSL_VERIFYPEER, FALSE);

    curl_setopt($ch,CURLOPT_SSLVERSION,3);

    curl_setopt($ch,CURLOPT_SSL_VERIFYHOST, FALSE);

    $page=curl_exec($ch);

    //echo curl_error($ch);

    $httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);

    curl_close($ch);

    if($httpcode>=200 && $httpcode<300) return true;

    else return false;

}

if (Visit("http://www.google.com"))

    echo "Website OK"."n";

else

    echo "Website DOWN";

译文:http://blog.koonk.com