必须收藏的23个php实用代码片段

2020-03-22 20:03:43

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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 = $postData //,CURLOPT_FOLLOWLOCATION = true
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
其中“$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：
$message = "Hello World";$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：
$to = "abc@example.com";$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：
$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：
$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：
$url = "http://blog.koonk.com";$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：
$page = "koonktechnologies";$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) $g = ($rgb $b = $rgb $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：
$domain = "http://www.blog.koonk.com";$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：
$email = "blog@koonk.com";$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：
$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：
$text = "This is my first post on http://blog.koonk.com";$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：
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：
$files=array('file1.jpg', 'file2.jpg', 'file3.gif'); create_zip($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;
$im2 = imagecreatetruecolor($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：
$to = "admin@koonk.com";$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：
$seconds = "56789";$output = secsToStr($seconds);echo $output;20. 数据库连接
连接 MySQL 数据库
$DBNAME = 'koonk';$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($handle);语法：
list_files("images/"); //This will list all files of images folder22. 检测用户语言
使用下面的 PHP 代码片段可以检测用户浏览器所使用的语言
function get_client_language($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：
$csvFile = "test.csv";$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。PHP教程

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