46 个非常有用的 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 => $postData  //,CURLOPT_FOLLOWLOCATION => true )); //Ignore SSL certificate verification curl_setopt($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：

<?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) . "<br>/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 $deny_ips array if ( (array_search($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。

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：

<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

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

<?php unzip('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><br>'."/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 molecule foreach ($xml->molecule as $record) {    //attribute are accessted by    echo $record['name'], '  ';    //node are accessted by -> operator    echo $record->symbol, '  ';    echo $record->code, '<br />'; } 

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 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

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

语法：

<?php echo "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; } $date = "2014-12-04 19:37:22"; echo '<pre>'; print_r( _date_diff( strtotime($date), time() ) ); echo '</pre>';  ?> 

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：

<?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

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).'<br />'; } ?>

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 ($ch);  //If you want to see the response from Twitter, uncomment this next part out:  //echo "<p>Response:</p>";  //echo "<pre>".htmlspecialchars($xml)."</pre>";  $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 = $entry->id;   echo "<p>Tweet from ".$author.": <strong>".$text."</strong>  <em>Posted ".date('n/j/y g:i a',$time)."</em></p>";  }  return true ; } 

39. 添加 th,st,nd 或者 rd 作为数字的后缀

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：

<?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

<?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

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'; $save_to    = './jpg/demo.jpg';     //make sure that apache has permissions to write in this folder! (common problem) //execute ImageMagick command 'convert' and convert PDF to JPG with applied settings exec('convert "'.$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.<br />".$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><br><br>/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 ?>

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