19个超实用的PHP代码片段_php实例

1) Whois query using PHP ——利用PHP获取Whois请求

利用这段代码，在特定的域名里可获得whois信息。把域名名称作为参数，并显示所有域名的相关信息。

复制代码 代码如下:

function whois_query($domain) { 

    // 修复域名： 
    $domain = strtolower(trim($domain)); 
    $domain = preg_replace('/^http:///i', '', $domain); 
    $domain = preg_replace('/^www./i', '', $domain); 
    $domain =explode('/', $domain); 
    $domain = trim($domain[0]); 

    // 将 TLD 与域名分开 
    $_domain =explode('.', $domain); 
    $lst = count($_domain)-1; 
    $ext = $_domain[$lst]; 

    // 您可以找到资源和列表  
    // 就像维基百科上的这些：  
    // 
    // 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", 
        “在”=>; "whois.ncst.ernet.in", 
        "ir" =>; "whois.nic.ir", 
        "mc" =>; "whois.ripe.net", 
        “至”=>; "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('错误：找不到匹配的网卡服务器！'); 
    } 

    $nic_server = $servers[$ext]; 

    $output = ''; 

    // connect to whois server: 
    if ($conn = fsockopen ($nic_server, 43)) { 
        fputs($conn, $domain."rn"); 
        while(!feof($conn)) { 
            $output .= fgets($conn,128); 
        } 
        fclose($conn); 
    } 
    else { die('Error: Could not connect to ' . $nic_server . '!'); } 

    return $output; 
} 

2) Text messaging with PHP using the TextMagic API ——使用TextMagic API 获取PHP Test信息

TextMagic引入强大的核心API，可轻松将SMS发送到手机。该API是需要付费。

复制代码 代码如下:

the TextMagic PHP lib 
require('textmagic-sms-api-php/TextMagicAPI.php'); 

// Set the username and password information 
$username = 'myusername'; 
$password = 'mypassword'; 

// Create a new instance of TM 
$router = new TextMagicAPI(array( 
    'username' => $username, 
    'password' => $password 
)); 

// Send a text message to '999-123-4567' 
$result = $router->send('Wake up!', array(9991234567), true); 

// result:  Result is: Array ( [messages] => Array ( [19896128] => 9991234567 ) [sent_text] => Wake up! [parts_count] => 1 ) 

3) Get info about your memory usage——获取内存使用率

这段代码帮助你获取内存使用率。

复制代码 代码如下:

echo "Initial: ".memory_get_usage()." bytes n"; 
/* prints
Initial: 361400 bytes
*/ 

// let's use up some memory 
for ($i = 0; $i < 100000; $i ) { 
    $array []= md5($i); 
} 

// let's remove half of the array 
for ($i = 0; $i < 100000; $i ) { 
    unset($array[$i]); 
} 

echo "Final: ".memory_get_usage()." bytes n"; 
/* prints
Final: 885912 bytes
*/ 

echo "Peak: ".memory_get_peak_usage()." bytes n"; 
/* prints
Peak: 13687072 bytes
*/ 

4) Display source code of any webpage——查看任意网页源代码

如果你想查看网页源代码，那么只需更改第二行的URL，源代码就会在网页上显示出。

复制代码 代码如下:

$line) {  
    // loop thru each line and prepend line numbers 
    echo "Line #{$line_num} : " . htmlspecialchars($line) . " 
n"; 
} 

5) Create data uri's——创建数据uri

通过使用此代码，你可以创建数据Uri，这对在HTML/CSS中嵌入图片非常有用，可帮助节省HTTP请求。

复制代码 代码如下:

function data_uri($file, $mime) { 
  $contents=file_get_contents($file); 
  $base64=base64_encode($contents); 
  echo "data:$mime;base64,$base64"; 
}

6) Detect location by IP——通过IP检索出地理位置

这段代码帮助你查找特定的IP，只需在功能参数上输入IP，就可检测出位置。

复制代码 代码如下:

function detector_city($ip) { 

        $default = '未知'; 

        if (!is_string($ip) || strlen($ip) 1, 
            CURLOPT_HEADER      => 0, 
            CURLOPT_RETURNTRANSFER => 1, 
            CURLOPT_USERAGENT   => $curlopt_useragent, 
            CURLOPT_URL       => $url, 
            CURLOPT_TIMEOUT         => 1, 
            CURLOPT_REFERER         => '$_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('{ 
城市 : ([^}i', $content, $regs) ) { $city = $regs[1]; } if ( preg_match('{ 

州/省 : ([^
}i', $content, $regs) ) { $state = $regs[1 ]; } if( $city!=” && $state!=” ){ $location = $city . '，'。 $状态；返回$位置； }其他{返回$默认值; } } 

7) 检测浏览器语言——查看浏览器语言

检测浏览器使用的代码脚本语言。

复制代码代码如下：

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; 
} 

8) 检查服务器是否是HTTPS——检测服务器是否是HTTPS

复制代码代码如下：

if ($_SERVER['HTTPS'] != "on") {  
    echo "这不是 HTTPS”； 
}else{ 
    echo "这是 HTTPS"; 
} 

9) 从 PHP 数组生成 CSV 文件——在 PHP 内存中生​​成.csv 文件

复制代码代码如下：

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; 
} 

10.查找Longitudes与Latitudes之间的距离

复制代码 代码如下:

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');  
} 

$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).' 
'; 
}

The example returns the following: 

复制代码 代码如下:

miles: 2.6025 
feet: 13,741.4350 
yards: 4,580.4783 
kilometers: 4.1884 
meters: 4,188.3894

11.完善cURL功能

复制代码 代码如下:

function xcurl($url,$ref=null,$post=array(),$ua="Mozilla/5.0 (X11; Linux x86_64; rv:2.2a1pre) Gecko/20110324 Firefox/4.2a1pre",$print=false) { 
    $ch = curl_init(); 
    curl_setopt($ch, CURLOPT_AUTOREFERER, true); 
    if(!empty($ref)) { 
        curl_setopt($ch, CURLOPT_REFERER, $ref); 
    } 
    curl_setopt($ch, CURLOPT_URL, $url); 
    curl_setopt($ch, CURLOPT_HEADER, 0); 
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1); 
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
    if(!empty($ua)) { 
        curl_setopt($ch, CURLOPT_USERAGENT, $ua); 
    } 
    if(count($post) > 0){ 
        curl_setopt($ch, CURLOPT_POST, 1); 
        curl_setopt($ch, CURLOPT_POSTFIELDS, $post);     
    } 
    $output = curl_exec($ch); 
    curl_close($ch); 
    if($print) { 
        print($output); 
    } else { 
        return $output; 
    } 
}

12.清理用户输入

复制代码 代码如下:

function cleanInput($input) {

  $search = array(
    '@<script>]*?>.*?< /script>@si',   // 去掉 javascript<BR>    '@<[/!]*?[^<>]*?>@si',            // 去掉 HTML 标签<BR>    ' @<style[^>]*?>.*?@siU',    // 正确去除样式标签<BR>    '@<![sS]*?--[ tnr]* >@'         // 去掉多行注释<BR>  );<br><br>    $output = preg_replace($search, '', $input);<BR>    return $output;<BR>  }<BR>?><BR><?php<BR>函数清理($input) {<BR>    if (is_array($input)) {<BR>        foreach($input as $var=>$val) { <BR>            $output[$var] = sanitize($val);<BR>        }<BR>    }<BR>    else {<BR>        if (get_magic_quotes_gpc()) {<BR>            $input = stripslashes( $输入） ;<BR>        }<BR>        $input = cleanInput($input);<BR>        $output = mysql_real_escape_string($input);<BR>    }<BR>    return $output;<BR>}<BR>?> </script>

13.通过IP（城市、国家）检测断层

复制代码代码如下：

function detector_city( $ip) { 

        $default = '加利福尼亚州好莱坞'; 

        if (!is_string($ip) || strlen($ip) 1, 
            CURLOPT_HEADER      => 0, 
            CURLOPT_RETURNTRANSFER => 1, 
            CURLOPT_USERAGENT   => $curlopt_useragent, 
            CURLOPT_URL       => $url, 
            CURLOPT_TIMEOUT         => 1, 
            CURLOPT_REFERER         => '$_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('{ 

     
城市 : ([^}i', $content, $regs) ) { $city = $规则[1]； } if ( preg_match('{ 

州/省 : ([^
}i', $content, $regs) ) { $state = $regs[1 ]; } if( $city!='' && $state!='' ){ $location = $city . '，'。 $状态；返回$位置； }其他{返回$默认值; } } 

14.设置密码强度

复制代码代码如下：

function password_strength($string){
    $h    = 0;
    $size = strlen($string);
    foreach(count_chars($string, 1) as $v){
        $p = $v / $size;
        $h -= $p * log($p) / log(2);
    }
    $strength = ($h / 4) * 100;
    if($strength > 100){
        $strength = 100;
    }
    return $strength;
}

var_dump(password_strength("Correct Horse Battery Staple"));
echo "
";
var_dump(password_strength("Super Monkey Ball"));
echo "
";
var_dump(password_strength("Tr0ub4dor&3"));
echo "
";
var_dump(password_strength("abc123"));
echo "
";
var_dump(password_strength("sweet"));

15.检测浏览器语言，只提供可用的$availableLanguages作为数组(‘en', ‘de', ‘es')

复制代码 代码如下:

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

    if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) { 

        $langs=explode(',',$_SERVER['HTTP_ACCEPT_LANGUAGE']); 

        //start going through each one 
        foreach ($langs as $value){ 

            $choice=substr($value,0,2); 
            if(in_array($choice, $availableLanguages)){ 
                return $choice; 

            } 

        } 
    }  
    return $default; 
}

16.创建数据URL

复制代码 代码如下:

function data_uri($file, $mime) { 
  $contents=file_get_contents($file); 
  $base64=base64_encode($contents); 
  echo "data:$mime;base64,$base64"; 
}

17.创建更加友好的页面标题SEO URL

输入示例：$title = “This foo's bar is rockin' cool!”; echo makeseoname($title); //RETURNS: //this-foos-bar-is-rockin-cool

复制代码 代码如下:

function make_seo_name($title) { 
    return preg_replace('/[^a-z0-9_-]/i', '', strtolower(str_replace(' ', '-', trim($title)))); 
}

18.终极加密功能

复制代码 代码如下:

// f(ucking) u(ncrackable) e(ncryption) function by BlackHatDBL (www.netforme.net) 
function fue($hash,$times) { 
    // Execute the encryption(s) as many times as the user wants 
    for($i=$times;$i>0;$i--) { 
        // Encode with base64... 
        $hash=base64_encode($hash); 
        // and md5... 
        $hash=md5($hash); 
        // sha1... 
        $hash=sha1($hash); 
        // sha256... (one more) 
        $hash=hash("sha256", $hash); 
        // sha512 
        $hash=hash("sha512", $hash); 

    } 
    // Finaly, when done, return the value 
    return $hash; 
}

19a.Tweeter Feed Runner——使用任意twitter名，可在任意页面上加载用户资源。

复制代码 代码如下:

 
    public function loadTimeline($user, $max = 20){  
        $this->twitURL .= 'statuses/user_timeline.xml?screen_name='.$user.'&count='.$最大限度;  
        $ch        = curl_init();  
        curl_setopt($ch, CURLOPT_URL, $this->twitURL);  
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);  
        $this->xml = curl_exec($ch);  
        返回 $this;  
    }  
    public function getTweets(){  
        $this->twitterArr = $this->getTimelineArray();  
        $tweets = array();  
        foreach($this->twitterArr->status as $status){  
            $tweets[$status->created_at->__toString()] = $status->text->__toString ();  
        }  
        返回 $tweets；  
    }  
    public function getTimelineArray(){  
        return simplexml_load_string($this->xml);  
    }  
    public function formatTweet($tweet){  
        $tweet = preg_replace("/(http(. ?))( |$)/","$1$3", $tweet);  
        $tweet = preg_replace("/#(. ?)(h|W|$)/", "#$1$2", $tweet);  
        $tweet = preg_replace("/@(. ?)(h|W|$)/", "@$1$2", $tweet);  
        返回 $tweet;  
    }  

19b。 Tweeter Feed Runner——用于在主题中创建文件，比如：example.php

复制代码代码如下：

loadTimeline("phpsnips")->getTweets();  
foreach($feed as $time => $message){  
    echo "

".$twitter->formatTweet($message)."
在: ".$time."

";  
} 

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