直接拿来用 九个超实用的PHP代码片段（二），

直接拿来用 九个超实用的PHP代码片段（二），

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。>>>

　　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。

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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>     //     $servers = array(         "biz" =&gt; "whois.neulevel.biz",         "com" =&gt; "whois.internic.net",         "us" =&gt; "whois.nic.us",         "coop" =&gt; "whois.nic.coop",         "info" =&gt; "whois.nic.info",         "name" =&gt; "whois.nic.name",         "net" =&gt; "whois.internic.net",         "gov" =&gt; "whois.nic.gov",         "edu" =&gt; "whois.internic.net",         "mil" =&gt; "rs.internic.net",         "int" =&gt; "whois.iana.org",         "ac" =&gt; "whois.nic.ac",         "ae" =&gt; "whois.uaenic.ae",         "at" =&gt; "whois.ripe.net",         "au" =&gt; "whois.aunic.net",         "be" =&gt; "whois.dns.be",         "bg" =&gt; "whois.ripe.net",         "br" =&gt; "whois.registro.br",         "bz" =&gt; "whois.belizenic.bz",         "ca" =&gt; "whois.cira.ca",         "cc" =&gt; "whois.nic.cc",         "ch" =&gt; "whois.nic.ch",         "cl" =&gt; "whois.nic.cl",         "cn" =&gt; "whois.cnnic.net.cn",         "cz" =&gt; "whois.nic.cz",         "de" =&gt; "whois.nic.de",         "fr" =&gt; "whois.nic.fr",         "hu" =&gt; "whois.nic.hu",         "ie" =&gt; "whois.domainregistry.ie",         "il" =&gt; "whois.isoc.org.il",         "in" =&gt; "whois.ncst.ernet.in",         "ir" =&gt; "whois.nic.ir",         "mc" =&gt; "whois.ripe.net",         "to" =&gt; "whois.tonic.to",         "tv" =&gt; "whois.tv",         "ru" =&gt; "whois.ripn.net",         "org" =&gt; "whois.pir.org",         "aero" =&gt; "whois.information.aero",         "nl" =&gt; "whois.domain-registry.nl"     );       if (!isset($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。

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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。

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echo "Initial: ".memory_get_usage()." bytes \n"; /* prints Initial: 361400 bytes */   // let's use up some memory for (<code class="php variable">$i = 0; <code class="php variable">$i <code class="php variable">$i++) {     $array []= md5(<code class="php variable">$i); }   // let's remove half of the array for (<code class="php variable">$i = 0; <code class="php variable">$i <code class="php variable">$i++) {     unset($array[<code class="php variable">$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。

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

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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。

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function detect_city(<code class="php variable">$ip) {           $default = 'UNKNOWN';           if (!is_string(<code class="php variable">$ip) || strlen(<code class="php variable">$ip) <code class="php variable">$ip == '127.0.0.1' || <code class="php variable">$ip == 'localhost')             <code class="php variable">$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)';                  $url = 'http://ipinfodb.com/ip_locator.php?ip=' . urlencode(<code class="php variable">$ip);         $ch = curl_init();                  $curl_opt = array(             CURLOPT_FOLLOWLOCATION  =&gt; 1,             CURLOPT_HEADER      =&gt; 0,             CURLOPT_RETURNTRANSFER  =&gt; 1,             CURLOPT_USERAGENT   =&gt; $curlopt_useragent,             CURLOPT_URL       =&gt; $url,             CURLOPT_TIMEOUT         =&gt; 1,             CURLOPT_REFERER         =&gt; '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 : ([^ <code class="php plain">}i’, $content, $regs) ) { $city = $regs[1]; } if ( preg_match(‘{   State/Province : ([^ <code class="php spaces">   }i’, $content, $regs) ) { $state = $regs[1]; } if( $city!=” &amp;&amp; $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。

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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

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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

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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; }

　　英文出自：Designzum