非常有用的 PHP 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 40+ 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。

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 => $postData    //,CURLOPT_FOLLOWLOCATION => true));                      //Ignore SSL certificate verificationcurl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);                      //get response$output = curl_exec($ch);//Print error if anyif(curl_errno($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：

<?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。

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：

<?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。

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：

<?php$text = "<script>alert(1)</script>";$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

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('{<li>City : ([^<]*)</li>}i', $content, $regs) )  {            $city = $regs[1];        }        if ( preg_match('{<li>State/Province : ([^<]*)</li>}i', $content, $regs) )  {            $state = $regs[1];        }                   if( $city!='' && $state!='' ){          $location = $city . ', ' . $state;          return $location;        }else{          return $default;         }                      }

语法：

<?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

function display_sourcecode($url){$lines = file($url);$output = "";foreach ($lines as $line_num => $line) {     // loop thru each line and prepend line numbers    $output.= "Line #<b>{$line_num}</b> : " . htmlspecialchars($line) . "\n";}}

语法：

<?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

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：

<?php$page = "koonktechnologies";$count = fb_fan_count($page);echo $count;?>

7. 确定任意图片的主导颜色

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

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：

<?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。

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

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：

<?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。

function makeClickableLinks($text) {   $text = eregi_replace('(((f|ht){1}tp://)[-a-zA-Z0-9@:%_+.~#?&//=]+)',   '<a href="\1">\1</a>', $text);   $text = eregi_replace('([[:space:]()[{}])(www.[-a-zA-Z0-9@:%_+.~#?&//=]+)',   '\1<a href="http://\2">\2</a>', $text);   $text = eregi_replace('([_.0-9a-z-]+@([0-9a-z][0-9a-z-]+.)+[a-z]{2,3})',   '<a href="mailto:\1">\1</a>', $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

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 $deny_ips arrayif ( (array_search($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。

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：

<phpforce_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

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

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

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：

<?phpunzip('test.zip','unziped/test'); //File would be unzipped in unziped/test folder?>

17. 缩放图片

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。

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

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：

<?php$seconds = "56789";$output = secsToStr($seconds);echo $output;?>

20. 数据库连接

连接 MySQL 数据库

<?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

function list_files($dir){    if(is_dir($dir))    {        if($handle = opendir($dir))        {            while(($file = readdir($handle)) !== false)            {                if($file != "." && $file != ".." && $file != "Thumbs.db"/*pesky windows, images..*/)                {                    echo '<a target="_blank" href="'.$dir.$file.'">'.$file.'</a>'."\n";                }            }            closedir($handle);        }    }}

语法：

<?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

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

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

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

$xml_string="<?xml version='1.0'?><moleculedb>    <molecule name='Benzine'>        <symbol>ben</symbol>        <code>A</code>    </molecule>    <molecule name='Water'>        <symbol>h2o</symbol>        <code>K</code>    </molecule></moleculedb>";     //load the xml string using simplexml function$xml = simplexml_load_string($xml_string);     //loop through the each node of moleculeforeach ($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

$json_string='{"id":1,"name":"rolf","country":"russia","office":["google","oracle"]} ';$obj=json_decode($json_string);//print the parsed dataecho $obj->name; //displays rolfecho $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

function current_url(){$url = "http://" . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];$validURL = str_replace("&", "&", $url);return validURL;}

语法：

<?phpecho "Currently you are on: ".current_url();?>

28. 从任意的 Twitter 账号获取最新的 Tweet

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 = $value . "";        echo '<p class="twit">'.$content.' <a class="twt" href="'.$link.'" title="">  </a></p>';            }            }    }    }   语法：<?php$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

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

<?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 '<pre class="brush:php;toolbar:false">';print_r( _date_diff( strtotime($date), time() ) );echo '

'; ?> 31. 删除文件夹内容

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：

<?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

function highlighter_text($text, $words){    $split_words = explode( " " , $words );    foreach($split_words as $word)    {        $color = "#4285F4";        $text = preg_replace("|($word)|Ui" ,            "<span style=\"color:".$color.";\"><b>$1</b></span>" , $text );    }    return $text;}

语法：

<?php$string = "I like chocolates and I like apples";$words = "apple";echo highlighter_text($string ,$words);?>

33. 写入文件

<?$filename = 'blog.csv';$fp = fopen($filename, 'w');$output = " Hello ";$output .= " World! ";$output .= "\r\n";fputs($fp, $output);fclose($fp);?>

34. 根据 URL 下载图片

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：

<?php$url = "http://koonk.com/images/logo.png";$rename = "koonk.png";imagefromURL($url,$rename);?>

35. 检测 URL 是否有效

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

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：

<?phpheader("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

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：

<?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

function getTweets($hash_tag) {    $url = 'http://search.twitter.com/search.atom?q='.urlencode($hash_tag) ;    echo "<p>Connecting to <strong>$url</strong> ...</p>";    $ch = curl_init($url);    curl_setopt ($ch, CURLOPT_RETURNTRANSFER, TRUE);    $xml = curl_exec ($ch);    curl_close ($ch);    //If you want to see the response from Twitter, uncomment this next part out:    //echo "<p>Response:</p>";    //echo "<pre class="brush:php;toolbar:false">".htmlspecialchars($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

Friday the 13thfunction 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：

<?php$number = 10;echo ordinal($number); //output is 10th?>

40. 限制文件下载的速度

<?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

<?phpheader("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

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：

<?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

<?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 settingsexec('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

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：

<?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

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=$t_id&fmt=17";    echo "\t\tDownload (right-click > save as):\n\t\t";    echo "<a href=\"$flv_link\">FLV</a>\n\t\t";    echo "<a href=\"$hq_flv_link\">HQ FLV (if available)</a>\n\t\t";    echo "<a href=\"$mp4_link\">MP4</a>\n\t\t";    echo "<a href=\"$threegp_link\">3GP</a>\n";}

46. Facebook 样式的时间戳

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：

<?php$date = "2015-07-05 03:45";$result = nicetime($date); // 2 days ago?>

：http://blog.koonk.com  （）