九个超实用的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，笔者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。>>> 点击查看PHP代码片段（一）

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。

 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:
     //
     // <a href="http://de.wikipedia.org/wiki/Whois">http://de.wikipedia.org/wiki/Whois</a>
     //
     $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。 

 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。

 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——查看任意网页源代码

如果你想查看网页源代码，那么只需更改第二行的URL，源代码就会在网页上显示出。

 <?php // display source code $lines = file('http://google.com/'); foreach ($lines as $line_num => $line) {
     // loop thru each line and prepend line numbers
     echo "Line #{$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。

 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。

 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。

 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——检测服务器是否是HTTPS

 if ($_SERVER['HTTPS'] != "on") {
     echo "This is not HTTPS";
 }else{
     echo "This is HTTPS";
 }

9) Generate CSV file from a PHP array——在PHP数组中生成.csv 文件

 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;
 }