直接拿来用的10个PHP代码片段

PHP是一种HTML内嵌式的语言，是一种在服务器端执行的嵌入HTML文档的脚本语言。PHP拥有数以百计的基本功能，支持上千种扩展。这些功能都被很好的加载在PHP站点上，但内置的库有各种各样的命名。在PHP代码库中包含了无数个有用的PHP代码片段，每位开发者都需要不断完善自己的“工具箱”。有了这些代码片段可以为你节省大量的时间，一起来看下。

 

 

1.查找Longitudes与Latitudes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');

}

 

$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).'<br />';

}

 

The example returns the following:

 

miles: 2.6025

feet: 13,741.4350

yards: 4,580.4783

kilometers: 4.1884

meters: 4,188.3894

2.完善cURL功能

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;

    }

}

3.清理用户输入

<?php

function cleanInput($input) {

 

  $search = array(

    '@<script[^>]*?>.*?</script>@si',   // Strip out javascript

    '@<[\/\!]*?[^<>]*?>@si',            // Strip out HTML tags

    '@<style[^>]*?>.*?</style>@siU',    // Strip style tags properly

    '@<![\s\S]*?--[ \t\n\r]*>@'         // Strip multi-line comments

  );

 

    $output = preg_replace($search, '', $input);

    return $output;

  }

?>

<?php

function sanitize($input) {

    if (is_array($input)) {

        foreach($input as $var=>$val) {

            $output[$var] = sanitize($val);

        }

    }

    else {

        if (get_magic_quotes_gpc()) {

            $input = stripslashes($input);

        }

        $input  = cleanInput($input);

        $output = mysql_real_escape_string($input);

    }

    return $output;

}

?>

 

4.通过IP（城市、国家）检测地理位置

function detect_city($ip) {

 

        $default = 'Hollywood, CA';

 

        if (!is_string($ip) || strlen($ip) < 1 || $ip == '127.0.0.1' || $ip == 'localhost')             $ip = '8.8.8.8';           $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('{

 

    

City : ([^<]*)

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

    

State/Province : ([^<]*)

 

}i', $content, $regs) ) { $state = $regs[1]; } if( $city!='' && $state!='' ){ $location = $city . ', ' . $state; return $location; }else{ return $default; } }

 

5.设置密码强度

<?php 

/** 

 *  

 * @param String $string 

 * @return float 

 *  

 * Returns a float between 0 and 100. The closer the number is to 100 the 

 * the stronger password is; further from 100 the weaker the password is. 

 */ 

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 "<br>"; 

var_dump(password_strength("Super Monkey Ball")); 

echo "<br>"; 

var_dump(password_strength("Tr0ub4dor&3")); 

echo "<br>"; 

var_dump(password_strength("abc123")); 

echo "<br>"; 

var_dump(password_strength("sweet"));

 

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

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;

}

 

7.创建数据URL

function data_uri($file, $mime) {

  $contents=file_get_contents($file);

  $base64=base64_encode($contents);

  echo "data:$mime;base64,$base64";

}

 

8.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

 

1 2 3

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

9.终极加密功能

// 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;

}

 

10a.Tweeter Feed Runner——使用任意twitter名，可在任意页面上加载用户资源。

　　Twitter.php

<?php 

class Twitter{ 

    protected $twitURL = 'http://api.twitter.com/1/'; 

    protected $xml; 

    protected $tweets  = array(), $twitterArr = array(); 

    protected $pversion = "1.0.0"; 

    public function pversion(){ 

        return $this->pversion; 

    } 

    public function loadTimeline($user, $max = 20){ 

        $this->twitURL .= 'statuses/user_timeline.xml?screen_name='.$user.'&count='.$max; 

        $ch        = curl_init(); 

        curl_setopt($ch, CURLOPT_URL, $this->twitURL); 

        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); 

        $this->xml = curl_exec($ch); 

        return $this; 

    } 

    public function getTweets(){ 

        $this->twitterArr = $this->getTimelineArray(); 

        $tweets = array(); 

        foreach($this->twitterArr->status as $status){ 

            $tweets[$status->created_at->__toString()] = $status->text->__toString(); 

        } 

        return $tweets; 

    } 

    public function getTimelineArray(){ 

        return simplexml_load_string($this->xml); 

    } 

    public function formatTweet($tweet){ 

        $tweet = preg_replace("/(http(.+?))( |$)/","<a href=\"$0\">$1</a>$3", $tweet); 

        $tweet = preg_replace("/#(.+?)(\h|\W|$)/", "<a href=\"https://twitter.com/i/#!/search/?q=%23$1&src=hash\">#$1</a>$2", $tweet); 

        $tweet = preg_replace("/@(.+?)(\h|\W|$)/", "<a href=\"http://twitter.com/#!/$1\">@$1</a>$2", $tweet); 

        return $tweet; 

    } 

}

example.php

<?php 

$twitter = new Twitter(); 

$feed = $twitter->loadTimeline("phpsnips")->getTweets(); 

foreach($feed as $time => $message){ 

    echo "<div class='tweet'>".$twitter->formatTweet($message)."<br />At: ".$time."</div>"; 

}