非常有用的 PHP 代码片段分享-阿里云开发者社区

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～

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=
// 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($ch);
send_sms($mobile,$msg)
其中“$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);
?>

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);
send_email($to_email,$subject,$message1)
“$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）。
$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。

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;

clean($input)
$text = "";
$text = clean($text);
echo $text;

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;

detect_city($ip) {
$ip = $_SERVER['REMOTE_ADDR'];
$city = detect_city($ip);
echo $city;

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";

display_sourcecode($url)
$url = "http://blog.koonk.com";
$source = display_sourcecode($url);
echo $source;

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;

fb_fan_count($facebook_name)
$page = "koonktechnologies";
$count = fb_fan_count($page);
echo $count;

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/$total);
dominant_color($image)

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: 
//
// //代码效果参考：http://www.zidongmutanji.com/zsjx/165963.html

$servers = array(
    "biz" => "whois.neulevel.biz",
    "com" => "whois.internic.net",
    "us" => "whois.nic.us",
    "coop" => "whois.nic.coop",
    "info" => "whois.nic.info",
    "name" => "whois.nic.name",
    "net" => "whois.internic.net",
    "gov" => "whois.nic.gov",
    "edu" => "whois.internic.net",
    "mil" => "rs.internic.net",
    "int" => "whois.iana.org",
    "ac" => "whois.nic.ac",
    "ae" => "whois.uaenic.ae",
    "at" => "whois.ripe.net",
    "au" => "whois.aunic.net",
    "be" => "whois.dns.be",
    "bg" => "whois.ripe.net",
    "br" => "whois.registro.br",
    "bz" => "whois.belizenic.bz",
    "ca" => "whois.cira.ca",
    "cc" => "whois.nic.cc",
    "ch" => "whois.nic.ch",
    "cl" => "whois.nic.cl",
    "cn" => "whois.cnnic.net.cn",
    "cz" => "whois.nic.cz",
    "de" => "whois.nic.de",
    "fr" => "whois.nic.fr",
    "hu" => "whois.nic.hu",
    "ie" => "whois.domainregistry.ie",
    "il" => "whois.isoc.org.il",
    "in" => "whois.ncst.ernet.in",
    "ir" => "whois.nic.ir",
    "mc" => "whois.ripe.net",
    "to" => "whois.tonic.to",
    "tv" => "whois.tv",
    "ru" => "whois.ripn.net",
    "org" => "whois.pir.org",
    "aero" => "whois.information.aero",
    "nl" => "whois.domain-registry.nl"
);
if (!isset($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 . '!'); }

whois_query($domain) {
$domain = "http://www.blog.koonk.com";
$result = whois_query($domain);
print_r($result);

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 $check;
is_validemail($email)
$email = "blog@koonk.com";
$check = is_validemail($email);
echo $check;
// If the output is 1, then email is valid.

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;

getRealIpAddr()
$ip = getRealIpAddr();
echo $ip;

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@:%_+.~#?&//=]+)',
'<\1', $text);
$text = eregi_replace('([[:space:]()[{}])(www.[-a-zA-Z0-9@:%_+.~#?&//=]+)',
'\1', $text);
$text = eregi_replace('([_.0-9a-z-]+@(0-9a-z+.)+[a-z]{2,3})',
'<\1', $text);

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

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

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"; 
}

force_download($file)
<php
force_download("image.jpg");
"image.jpg");

//代码效果参考：http://www.zidongmutanji.com/bxxx/2968.html

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

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);  
    return false;

create_zip($files = array(),$destination = '',$overwrite = false) {
$files=array('file1.jpg', 'file2.jpg', 'file3.gif');
create_zip($files, 'myzipfile.zip', true);

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;
        return FALSE;

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

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;

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

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,$headers);
send_mail($to,$subject,$body)
$to = "admin@koonk.com";
$subject = "This is a test mail";
$body = "Hello World!";
send_mail($to,$subject,$body);

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;

secsToStr($secs) {
$seconds = "56789";
$output = secsToStr($seconds);
echo $output;

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)

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);

list_files($dir)

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

//代码效果参考：http://www.zidongmutanji.com/bxxx/491406.html

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;

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

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;

readCSV($csvFile){
$csvFile = "test.csv";
$csv = readCSV($csvFile);
$a = csv0; // This will get value of Column 1 & Row 1

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 $contents;
generateCsv($data, $delimiter = ',', $enclosure = '"') {
$data[0] = "apple";
$data[1] = "oranges";
generateCsv($data, $delimiter = ',', $enclosure = '"');

解析 XML 数据

$xml_string="<?xml version='1.0'?>

<molecule name='Benzine'>
    <symbol>ben</symbol>
    <code>A</code>
</molecule>
<molecule name='Water'>
    <symbol>h2o</symbol>
    <code>K</code>

";
//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, '
';
"<?xml version='1.0'?>

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