推薦10個非常實用的PHP程式碼片段_PHP教程

推薦10個非常實用的PHP程式碼片段

當使用PHP進行開發的時候，如果你自己收藏 了一些非常有用的方法或者程式碼片段，那麼將會給你的開發工作帶來極大的便利。今天我們將介紹10個超級好用的PHP程式碼片段，希望大家能夠喜歡！


1. 使用textmagic API發送訊息
可能有的時候，你需要發送一些簡訊給你的客戶，那麼你絕對應該看看textMagic。它提供了非常簡單的API來實現這個功能。但是不是免費的。

// Include 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 ) 

2. 通過IP判斷來源
這是一個非常實用的程式碼片段，可以協助你通過IP來判斷訪客來源。下面的方法通過接收一個參數，然後返回IP所在地點。如果沒有找到，則返回UNKNOWN。

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;          }  } 

3. 顯示任何網頁的原始碼
是不是想顯示帶有行號的任何網頁的原始碼？這裡有個簡單的程式碼片段，你只需要修改第二行的url即可

 $line) {        // loop thru each line and prepend line numbers        echo "Line #{$line_num} : " . htmlspecialchars($line) . "
\n";    }   ?>

4. 判斷伺服器是否是HTTPS串連
需要判斷代碼運行環境是否是HTTPS伺服器？下面的代碼可以協助你實現，非常簡單！

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

5. 在文本中顯示Facebook 粉絲數
想看看你在facebook有多少粉絲嗎？下面代碼可以協助你實現。

function fb_fan_count($facebook_name){        // Example: https://graph.facebook.com/digimantra        $data = json_decode(file_get_contents("https://graph.facebook.com/".$facebook_name));        echo $data->likes;    }       

6. 判斷一張圖片的主色調
下面這個代碼非常實用，能協助你判斷一張圖片中的主色調，你可以分析任何圖片。

$i = imagecreatefromjpeg("image.jpg");        for ($x=0;$x> 16) & 0xFF;            $g   = ($rgb >>  & 0xFF;            $b   = $rgb & 0xFF;                $rTotal += $r;            $gTotal += $g;            $bTotal += $b;            $total++;        }    }        $rAverage = round($rTotal/$total);    $gAverage = round($gTotal/$total);    $bAverage = round($bTotal/$total);    

7. 瞭解你的記憶體使用量情況
為了最佳化你的指令碼，你需要瞭解伺服器上的RAM使用方式。這個程式碼片段將協助你瞭解記憶體使用量，並且列印初始、最終以及峰值使用方式。

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   */    

8. 使用gzcompress()壓縮資料
當使用很長的string時，可以通過gzcompress()方法，將strings壓縮。解壓縮使用gzuncompress()即可。代碼如下。

$string =    "Lorem ipsum dolor sit amet, consectetur    adipiscing elit. Nunc ut elit id mi ultricies    adipiscing. Nulla facilisi. Praesent pulvinar,    sapien vel feugiat vestibulum, nulla dui pretium orci,    non ultricies elit lacus quis ante. Lorem ipsum dolor    sit amet, consectetur adipiscing elit. Aliquam    pretium ullamcorper urna quis iaculis. Etiam ac massa    sed turpis tempor luctus. Curabitur sed nibh eu elit    mollis congue. Praesent ipsum diam, consectetur vitae    ornare a, aliquam a nunc. In id magna pellentesque    tellus posuere adipiscing. Sed non mi metus, at lacinia    augue. Sed magna nisi, ornare in mollis in, mollis    sed nunc. Etiam at justo in leo congue mollis.    Nullam in neque eget metus hendrerit scelerisque    eu non enim. Ut malesuada lacus eu nulla bibendum    id euismod urna sodales. ";        $compressed = gzcompress($string);        echo "Original size: ". strlen($string)."\n";    /* prints   Original size: 800   */        echo "Compressed size: ". strlen($compressed)."\n";    /* prints   Compressed size: 418   */        // getting it back    $original = gzuncompress($compressed); 

9. 使用PHP執行Whois查詢
如果你需要得到指定網域名稱的whois資訊，為什麼不使用PHP呢？下面的代碼可以協助大家。

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;    }  

10. 不顯示PHP錯誤而寄送電子郵件取代之
如果你不想在頁面中顯示PHP錯誤，也可以通過email來擷取錯誤資訊。下面的代碼可以協助你實現。

An error ($number) occurred on line            $line and in the file: $file.            
 $message 
";            $email .= "
" . print_r($vars, 1) . "
";            $headers = 'Content-type: text/html; charset=iso-8859-1' . "\r\n";            // Email the error to someone...        error_log($email, 1, 'you@youremail.com', $headers);            // Make sure that you decide how to respond to errors (on the user's side)        // Either echo an error message, or kill the entire project. Up to you...        // The code below ensures that we only "die" if the error was more than        // just a NOTICE.        if ( ($number !== E_NOTICE) && ($number < 2048) ) {            die("There was an error. Please try again later.");        }    }        // We should use our custom function to handle errors.    set_error_handler('nettuts_error_handler');        // Trigger an error... (var doesn't exist)    echo $somevarthatdoesnotexist;?>  

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