直接拿来用，10个PHP代码片段

还记得优快云研发频道此前发表过的一篇《可以直接拿来用的15个jQuery代码片段》吗？本文笔者将继续为你奉上10个超级有用的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

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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

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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;      } }

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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; } ?>

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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 ; } }

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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" ));

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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 ; }

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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" ; }

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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)))); }

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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; }

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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>" ;  }

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