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($line) . "";}}语法：
<?php$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, $domain.""); while(!feof($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){$headers = "From: KOONK";$headers .= "Reply-To: blog@koonk.com";$headers .= "Return-Path: blog@koonk.com";$headers .= "X-Mailer: PHP5";$headers .= "MIME-Version: 1.0" . "";$headers .= "Content-type: text/html; charset=iso-8859-1" . "";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>".""; } } 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?>
以上就是本文的全部内容，希望对大家的学习有所帮助。
