19个超实用的PHP代码片段

 每位程序员和开发者都喜欢讨论他们最爱的代码片段，尤其是当PHP开发者花费数个小时为网页编码或创建应用时，他们更知道这些代码的重要性。为了节约编码时间，小编收集了一些较为实用的代码片段，帮助开发者提高工作效率

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。    代码如下: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;   }   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。     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 = $router->send('Wake up!', array(9991234567), true);     // result:  Result is: Array ( [messages] => Array ( [19896128] => 9991234567 ) [sent_text] => Wake up! [parts_count] => 1 )   3) Get info about your memory usage——获取内存使用率   这段代码帮助你获取内存使用率。    代码如下: echo "Initial: ".memory_get_usage()." bytes \n";   /* prints  Initial: 361400 bytes  */     // let's use up some memory   for ($i = 0; $i $line) {        // loop thru each line and prepend line numbers       echo "Line #{$line_num} : " . htmlspecialchars($line) . "   \n";   }   5) Create data uri's——创建数据uri   通过使用此代码，你可以创建数据Uri，这对在HTML/CSS中嵌入图片非常有用，可帮助节省HTTP请求。   代码如下: function data_uri($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。    代码如下: function detect_city($ip) {             $default = 'UNKNOWN';             if (!is_string($ip) || strlen($ip) 1,               CURLOPT_HEADER      => 0,               CURLOPT_RETURNTRANSFER  => 1,               CURLOPT_USERAGENT   => $curlopt_useragent,               CURLOPT_URL       => $url,               CURLOPT_TIMEOUT         => 1,               CURLOPT_REFERER         => '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 : ([^ 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:   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    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  代码如下:]*?>.*?@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 $output; } ?> 13.通过IP（城市、国家）检测地理位置 代码如下:function detect_city($ip) {             $default = 'Hollywood, CA';             if (!is_string($ip) || strlen($ip) 1,               CURLOPT_HEADER      => 0,               CURLOPT_RETURNTRANSFER  => 1,               CURLOPT_USERAGENT   => $curlopt_useragent,               CURLOPT_URL       => $url,               CURLOPT_TIMEOUT         => 1,               CURLOPT_REFERER         => '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 : ([^ 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') 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 $default;   }    16.创建数据URL   代码如下:function data_uri($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    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  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 $hash;   }  19a.Tweeter Feed Runner——使用任意twitter名，可在任意页面上加载用户资源。  代码如下:       public function loadTimeline($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 $tweet;        }      19b. Tweeter Feed Runner——用于在主题中创建文件，比如：example.php 代码如下: loadTimeline("phpsnips")->getTweets();    foreach($feed as $time => $message){        echo "";    }