10个经常用的php片段

1.查找Longitudes与Latitudes之间的距离
 

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

2.完善cURL功能

 

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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

 

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]*?>.*?@si ',   // Strip out javascript      ' @<[\/\!]*?[^<>]*?>@si ',            // Strip out HTML tags      ' @]*?>.*?@siU ',    // Strip style tags properly      ' @@ '         // Strip multi-line comments    );        $output = preg_replace($search, ' ', $input);      return  $output;    } ?> $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

 

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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

 

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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" ));

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

 

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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

 

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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

 

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

9.终极加密功能

 

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// 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。

 

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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){          $tweet = preg_replace( "/(http(.+?))( |$)/" , "$1$3" , $tweet);          $tweet = preg_replace( "/#(.+?)(\h|\W|$)/" ,  "#$1$2" , $tweet);          $tweet = preg_replace( "/@(.+?)(\h|\W|$)/" ,  "@$1$2" , $tweet);          return  $tweet;      } }

10b. Tweeter Feed Runner——用于在主题中创建文件，比如：example.php

 

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loadTimeline( "phpsnips" )->getTweets(); foreach($feed as $time => $message){      echo  "<div class='tweet'>" .$twitter->formatTweet($message). "<br />At: " .$time. "</div>" ; }