19 super practical PHP code snippets_PHP Tutorial

Every programmer and developer loves to discuss their favorite code snippets, especially when PHP developers spend hours coding web pages or creating applications, they know the importance of these codes even more. In order to save coding time, the editor has collected some practical code snippets to help developers improve work efficiency

1) Whois query using PHP——Use PHP to obtain Whois request ​ Using this code, whois information can be obtained in a specific domain name. Take the domain name as a parameter and display information about all domain names.   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, $domain."rn");       while(!feof($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——Use TextMagic API to obtain PHP Test information ​ TextMagic introduces powerful core API to easily send SMS to mobile phones. This API requires payment.​ ​ The code is as follows: 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 = $router->send('Wake up!', array(9991234567), true); ​ // result: Result is: Array ( [messages] => Array ( [19896128] => 9991234567 ) [sent_text] => Wake up! [parts_count] => 1 ) 3) Get info about your memory usage——Get the memory usage ​ This code helps you get memory usage. ​ The code is as follows: echo "Initial: ".memory_get_usage()." bytes n"; /* prints Initial: 361400 bytes */ ​ // let's use up some memory for ($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——View the source code of any webpage ​ If you want to view the source code of the web page, then just change the URL on the second line and the source code will be displayed on the web page. ​ The code is as follows: $line) { // loop thru each line and prepend line numbers echo "Line #{$line_num} : " . htmlspecialchars($line) . " n"; } 5) Create data uri's——Create data uri's ​ By using this code you can create data Uri which is useful for embedding images in HTML/CSS and helps save HTTP requests. ​ The code is as follows: function data_uri($file, $mime) { $contents=file_get_contents($file); $base64=base64_encode($contents); echo "data:$mime;base64,$base64"; } 6) Detect location by IP——Retrieve the geographical location through IP ​ This code helps you find a specific IP, just enter the IP on the function parameter and the location will be detected.   代码如下: function detect_city($ip) {             $default = 'UNKNOWN';             if (!is_string($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 $default; } }   7) Detect browser language——查看浏览器语言   检测浏览器使用的代码脚本语言。​ The code is as follows: function get_client_language($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 $default; } 8) Check if server is HTTPS——Check if server is HTTPS The code is as follows: if ($_SERVER['HTTPS'] != "on") { echo "This is not HTTPS"; }else{ echo "This is HTTPS"; } 9) Generate CSV file from a PHP array——Generate .csv file in PHP array The code is as follows: 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 $contents; } ​ 10. Find the distance between Longitudes and Latitudes ​ The code is as follows: function getDistanceBetweenPointsNew($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: The code is as follows: miles: 2.6025 feet: 13,741.4350 yards: 4,580.4783 kilometers: 4.1884 meters: 4,188.3894 ​ 11. Improve cURL function ​ The code is as follows: 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 || $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 $default; } }   14.设置密码强度  代码如下: function password_strength($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. Detect browser language and only provide available $availableLanguages ​​as array (‘en’, ‘de’, ‘es’) The code is as follows: function get_client_language($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 $default; } ​ 16. Create data URL ​ The code is as follows: function data_uri($file, $mime) { $contents=file_get_contents($file); $base64=base64_encode($contents); echo "data:$mime;base64,$base64"; } 17. Create a more friendly page title SEO URL ​ Input example: $title = "This foo's bar is rockin' cool!"; echo makeseoname($title); //RETURNS: //this-foos-bar-is-rockin-cool ​ The code is as follows: function make_seo_name($title) { Return preg_replace('/[^a-z0-9_-]/i', '', strtolower(str_replace(' ', '-', trim($title)))); } 18. Ultimate Encryption Features The code is as follows: :// 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 $hash; } 19a.Tweeter Feed Runner - Use any twitter name to load user resources on any page. 代码如下:       public function loadTimeline($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 "

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

";    }    

http://www.bkjia.com/PHPjc/741819.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/741819.htmlTechArticle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...