php代码片段

sisophon 2019-09-28 PM 410℃ 0条

下面收集了50+的php代码片段,部分常用的片段可以收藏,使用的时候更方便。

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) . "\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>'."\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, '';
}

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).'';
    }
?>

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.".$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
?>

47.黑名单过滤

function is_spam($text, $file, $split = ':', $regex = false){ 
    $handle = fopen($file, 'rb'); 
    $contents = fread($handle, filesize($file)); 
    fclose($handle); 
    $lines = explode("n", $contents); 
    $arr = array(); 
    foreach($lines as $line){ 
        list($word, $count) = explode($split, $line); 
        if($regex) 
            $arr[$word] = $count; 
        else
            $arr[preg_quote($word)] = $count; 
    } 
    preg_match_all("~".implode('|', array_keys($arr))."~", $text, $matches); 
    $temp = array(); 
    foreach($matches[0] as $match){ 
        if(!in_array($match, $temp)){ 
            $temp[$match] = $temp[$match] + 1; 
            if($temp[$match] >= $arr[$word]) 
                return true; 
        } 
    } 
    return false; 
} 

$file = 'spam.txt'; 
$str = 'This string has cat, dog word'; 
if(is_spam($str, $file)) 
    echo 'this is spam'; 
else
    echo 'this is not spam';

输出:

ab:3
dog:3
cat:2
monkey:2

48、随机颜色生成器

function randomColor() { 
    $str = '#'; 
    for($i = 0 ; $i < 6 ; $i++) { 
        $randNum = rand(0 , 15); 
        switch ($randNum) { 
            case 10: $randNum = 'A'; break; 
            case 11: $randNum = 'B'; break; 
            case 12: $randNum = 'C'; break; 
            case 13: $randNum = 'D'; break; 
            case 14: $randNum = 'E'; break; 
            case 15: $randNum = 'F'; break; 
        } 
        $str .= $randNum; 
    } 
    return $str; 
} 
$color = randomColor();

49.从网络下载文件

set_time_limit(0); 
// Supports all file types 
// URL Here: 
$url = 'http://somsite.com/some_video.flv'; 
$pi = pathinfo($url); 
$ext = $pi['extension']; 
$name = $pi['filename']; 
 
// create a new cURL resource 
$ch = curl_init(); 
 
// set URL and other appropriate options 
curl_setopt($ch, CURLOPT_URL, $url); 
curl_setopt($ch, CURLOPT_HEADER, false); 
curl_setopt($ch, CURLOPT_BINARYTRANSFER, true); 
curl_setopt($ch, CURLOPT_AUTOREFERER, true); 
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true); 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); 
 
// grab URL and pass it to the browser 
$opt = curl_exec($ch); 
 
// close cURL resource, and free up system resources 
curl_close($ch); 
 
$saveFile = $name.'.'.$ext; 
if(preg_match("/[^0-9a-z._-]/i", $saveFile)) 
$saveFile = md5(microtime(true)).'.'.$ext; 
 
$handle = fopen($saveFile, 'wb'); 
fwrite($handle, $opt); 
fclose($handle);

50.Alexa/Google Page Rank

function page_rank($page, $type = 'alexa'){ 
    switch($type){ 
        case 'alexa': 
            $url = 'http://alexa.com/siteinfo/'; 
            $handle = fopen($url.$page, 'r'); 
            break; 
        case 'google': 
            $url = 'http://google.com/search?client=navclient-auto&ch=6-1484155081&features=Rank&q=info:';
            $handle = fopen($url.'http://'.$page, 'r'); 
            break; 
    } 
    $content = stream_get_contents($handle); 
    fclose($handle); 
    $content = preg_replace("~(n|t|ss+)~",'', $content); 
    switch($type){ 
        case 'alexa': 
            if(preg_match('~<div class="data (down|up)"><img.+?>(.+?) </div>~im',$content,$matches)){ 
                return $matches[2]; 
            }else{ 
            return FALSE; 
            } 
            break; 
        case 'google': 
            $rank = explode(':',$content); 
            if($rank[2] != '') 
                return $rank[2]; 
            else
                return FALSE; 
            break; 
        default: 
            return FALSE; 
            break; 
    } 
} 
// Alexa Page Rank: 
echo 'Alexa Rank: '.page_rank('techug.com'); 
echo '';
// Google Page Rank 
echo 'Google Rank: '.page_rank('techug.com', 'google');

51.强制下载文件

$filename = $_GET['file']; //Get the fileid from the URL 
// Query the file ID 
$query = sprintf("SELECT * FROM tableName WHERE id = '%s'",mysql_real_escape_string($filename)); 
$sql = mysql_query($query); 
if(mysql_num_rows($sql) > 0){ 
    $row = mysql_fetch_array($sql); 
    // Set some headers 
    header("Pragma: public"); 
    header("Expires: 0"); 
    header("Cache-Control: must-revalidate, post-check=0, pre-check=0"); 
    header("Content-Type: application/force-download"); 
    header("Content-Type: application/octet-stream"); 
    header("Content-Type: application/download"); 
    header("Content-Disposition: attachment; filename=".basename($row['FileName']).";"); 
    header("Content-Transfer-Encoding: binary"); 
    header("Content-Length: ".filesize($row['FileName'])); 
 
    @readfile($row['FileName']); 
    exit(0); 
}else{ 
    header("Location: /"); 
    exit; 
}

52.通过Email显示用户的Gravatar头像

$gravatar_link = 'http://www.gravatar.com/avatar/' . md5($comment_author_email) . '?s=32';
echo '<img src="' . $gravatar_link . '" />';

53.通过cURL获取RSS订阅数

$ch = curl_init();
curl_setopt($ch,CURLOPT_URL,'https://feedburner.google.com/api/awareness/1.0/GetFeedData?id=7qkrmib4r9rscbplq5qgadiiq4');
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,2);
$content = curl_exec($ch);
$subscribers = get_match('/circulation="(.*)"/isU',$content);
curl_close($ch);

54.时间差异计算函数

function ago($time)
{
    $periods = array("second", "minute", "hour", "day", "week", "month", "year", "decade");
    $lengths = array("60","60","24","7","4.35","12","10");
    $now = time();
    $difference = $now - $time;
    $tense = "ago";
    for($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] 'ago' ";
}

55.裁剪图片

$filename= "test.jpg";
list($w, $h, $type, $attr) = getimagesize($filename);
$src_im = imagecreatefromjpeg($filename);
 
$src_x = '0'; // begin x
$src_y = '0'; // begin y
$src_w = '100'; // width
$src_h = '100'; // height
$dst_x = '0'; // destination x
$dst_y = '0'; // destination y
 
$dst_im = imagecreatetruecolor($src_w, $src_h);
$white = imagecolorallocate($dst_im, 255, 255, 255);
imagefill($dst_im, 0, 0, $white);
 
imagecopy($dst_im, $src_im, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h);
 
header("Content-type: image/png");
imagepng($dst_im);
imagedestroy($dst_im);

56.检查网站是否宕机

function Visit($url){
    $agent = "Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)";$ch=curl_init();
    curl_setopt ($ch, CURLOPT_URL,$url );
    curl_setopt($ch, CURLOPT_USERAGENT, $agent);
    curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt ($ch,CURLOPT_VERBOSE,false);
    curl_setopt($ch, CURLOPT_TIMEOUT, 5);
    curl_setopt($ch,CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($ch,CURLOPT_SSLVERSION,3);
    curl_setopt($ch,CURLOPT_SSL_VERIFYHOST, FALSE);
    $page=curl_exec($ch);
    //echo curl_error($ch);
    $httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);
    if($httpcode>=200 && $httpcode<300) return true;
    else return false;
}
if (Visit("http://www.google.com"))
    echo "Website OK"."n";
else
    echo "Website DOWN";
标签: PHP

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