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非常实用的PHP代码片段推荐_PHP

时间：2021-07-01 10:21:17 帮助过：5人阅读

当使用PHP进行开发的时候，如果你自己收 藏 了一些非常有用的方法或者代码片段，那么将会给你的开发工作带来极大的便利。今天我们将介绍10个超级好用的PHP代码片段，希望大家能够喜欢！

1. 使用textmagic API发送消息

可能有的时候，你需要发送一些短信给你的客户，那么你绝对应该看看textMagic。它提供了非常简单的API来实现这个功能。但是不是免费的。

  1. // Include the TextMagic PHP lib
  2. require('textmagic-sms-api-php/TextMagicAPI.php');
  3. // Set the username and password information
  4. $username = 'myusername';
  5. $password = 'mypassword';
  6. // Create a new instance of TM
  7. $router = new TextMagicAPI(array(
  8. 'username' => $username,
  9. 'password' => $password
  10. ));
  11. // Send a text message to '999-123-4567'
  12. $result = $router->send('Wake up!', array(9991234567), true);
  13. // result:  Result is: Array ( [messages] => Array ( [19896128] => 9991234567 ) [sent_text] => Wake up! [parts_count] => 1 )

2. 通过IP判断来源

这是一个非常实用的代码片段，可以帮助你通过IP来判断访客来源。下面的方法通过接收一个参数，然后返回IP所在地点。如果没有找到，则返回UNKNOWN。

  1. function detect_city($ip) {
  2.         $default = 'UNKNOWN';
  3.         if (!is_string($ip) || strlen($ip) < 1 || $ip == '127.0.0.1' || $ip == 'localhost')
  4.             $ip = '8.8.8.8';
  5.         $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)';
  6.         $url = 'http://ipinfodb.com/ip_locator.php?ip=' . urlencode($ip);
  7.         $ch = curl_init();
  8.         $curl_opt = array(
  9.             CURLOPT_FOLLOWLOCATION  => 1,
  10.             CURLOPT_HEADER      => 0,
  11.             CURLOPT_RETURNTRANSFER  => 1,
  12.             CURLOPT_USERAGENT   => $curlopt_useragent,
  13.             CURLOPT_URL       => $url,
  14.             CURLOPT_TIMEOUT         => 1,
  15.             CURLOPT_REFERER         => 'http://' . $_SERVER['HTTP_HOST'],
  16.         );
  17.         curl_setopt_array($ch, $curl_opt);
  18.         $content = curl_exec($ch);
  19.         if (!is_null($curl_info)) {
  20.             $curl_info = curl_getinfo($ch);
  21.         }
  22.         curl_close($ch);
  23.         if ( preg_match('{<li>City : ([^<]*)</li>}i', $content, $regs) )  {
  24.             $city = $regs[1];
  25.         }
  26.         if ( preg_match('{<li>State/Province : ([^<]*)</li>}i', $content, $regs) )  {
  27.             $state = $regs[1];
  28.         }
  29.         if( $city!='' && $state!='' ){
  30.           $location = $city . ', ' . $state;
  31.           return $location;
  32.         }else{
  33.           return $default;
  34.         }
  35.     }

3. 显示任何网页的源代码

是不是想显示带有行号的任何网页的源代码？这里有个简单的代码片段，你只需要修改第二行的url即可。 

  1. <!--?php // display source code
  2. $lines = file('http://google.com/');
  3. foreach ($lines as $line_num =--> $line) {
  4. // loop thru each line and prepend line numbers
  5. echo "Line #<b>{$line_num}</b> : " . htmlspecialchars($line) . "<br>\n";
  6. }

4. 判断服务器是否是HTTPS连接

需要判断代码运行环境是否是HTTPS服务器？下面的代码可以帮助你实现，非常简单！

  1. if ($_SERVER['HTTPS'] != "on") {
  2. echo "This is not HTTPS";
  3. }else{
  4. echo "This is HTTPS";
  5. }

5. 在文本中显示Facebook 粉丝数

想看看你在facebook有多少粉丝么？下面代码可以帮助你实现。

  1. function fb_fan_count($facebook_name){
  2.     // Example: https://graph.facebook.com/digimantra
  3.     $data = json_decode(file_get_contents("https://graph.facebook.com/".$facebook_name));
  4.     echo $data->likes;
  5. }

6. 判断一张图片的主色调

下面这个代码非常实用，能帮助你判断一张图片中的主色调，你可以分析任何图片。

  1. $i = imagecreatefromjpeg("image.jpg");
  2. for ($x=0;$x<imagesx($i);$x++) {="" for="" ($y="0;$y<imagesy($i);$y++)" $rgb="imagecolorat($i,$x,$y);" $r="($rgb">> 16) & 0xFF;
  3.         $g   = ($rgb >>  & 0xFF;
  4.         $b   = $rgb & 0xFF;
  5.         $rTotal += $r;
  6.         $gTotal += $g;
  7.         $bTotal += $b;
  8.         $total++;
  9.     }
  10. }
  11. $rAverage = round($rTotal/$total);
  12. $gAverage = round($gTotal/$total);
  13. $bAverage = round($bTotal/$total);</imagesx($i);$x++)>

7. 了解你的内存使用情况

为了优化你的脚本，你需要了解服务器上的RAM使用情况。这个代码片段将帮助你了解内存使用，并且打印初始、最终以及峰值使用情况。

  1. echo "Initial: ".memory_get_usage()." bytes \n";
  2. /* prints
  3. Initial: 361400 bytes
  4. */
  5. // let's use up some memory
  6. for ($i = 0; $i < 100000; $i++) {
  7. $array []= md5($i);
  8. }
  9. // let's remove half of the array
  10. for ($i = 0; $i < 100000; $i++) {
  11. unset($array[$i]);
  12. }
  13. echo "Final: ".memory_get_usage()." bytes \n";
  14. /* prints
  15. Final: 885912 bytes
  16. */
  17. echo "Peak: ".memory_get_peak_usage()." bytes \n";
  18. /* prints
  19. Peak: 13687072 bytes
  20. */

8. 使用gzcompress()压缩数据

当使用很长的string时，可以通过gzcompress()方法，将strings压缩。解压缩使用gzuncompress()即可。代码如下。

  1. $string =
  2. "Lorem ipsum dolor sit amet, consectetur
  3. adipiscing elit. Nunc ut elit id mi ultricies
  4. adipiscing. Nulla facilisi. Praesent pulvinar,
  5. sapien vel feugiat vestibulum, nulla dui pretium orci,
  6. non ultricies elit lacus quis ante. Lorem ipsum dolor
  7. sit amet, consectetur adipiscing elit. Aliquam
  8. pretium ullamcorper urna quis iaculis. Etiam ac massa
  9. sed turpis tempor luctus. Curabitur sed nibh eu elit
  10. mollis congue. Praesent ipsum diam, consectetur vitae
  11. ornare a, aliquam a nunc. In id magna pellentesque
  12. tellus posuere adipiscing. Sed non mi metus, at lacinia
  13. augue. Sed magna nisi, ornare in mollis in, mollis
  14. sed nunc. Etiam at justo in leo congue mollis.
  15. Nullam in neque eget metus hendrerit scelerisque
  16. eu non enim. Ut malesuada lacus eu nulla bibendum
  17. id euismod urna sodales. ";
  18. $compressed = gzcompress($string);
  19. echo "Original size: ". strlen($string)."\n";
  20. /* prints
  21. Original size: 800
  22. */
  23. echo "Compressed size: ". strlen($compressed)."\n";
  24. /* prints
  25. Compressed size: 418
  26. */
  27. // getting it back
  28. $original = gzuncompress($compressed);

9. 使用PHP执行Whois查询

如果你需要得到指定域名的whois信息，为什么不使用PHP呢？下面的代码可以帮助大家。

  1. function whois_query($domain) {
  2.     // fix the domain name:
  3.     $domain = strtolower(trim($domain));
  4.     $domain = preg_replace('/^http:\/\//i', '', $domain);
  5.     $domain = preg_replace('/^www\./i', '', $domain);
  6.     $domain = explode('/', $domain);
  7.     $domain = trim($domain[0]);
  8.     // split the TLD from domain name
  9.     $_domain = explode('.', $domain);
  10.     $lst = count($_domain)-1;
  11.     $ext = $_domain[$lst];
  12.     // You find resources and lists
  13.     // like these on wikipedia:
  14.     //
  15.     // http://de.wikipedia.org/wiki/Whois
  16.     //
  17.     $servers = array(
  18.         "biz" => "whois.neulevel.biz",
  19.         "com" => "whois.internic.net",
  20.         "us" => "whois.nic.us",
  21.         "coop" => "whois.nic.coop",
  22.         "info" => "whois.nic.info",
  23.         "name" => "whois.nic.name",
  24.         "net" => "whois.internic.net",
  25.         "gov" => "whois.nic.gov",
  26.         "edu" => "whois.internic.net",
  27.         "mil" => "rs.internic.net",
  28.         "int" => "whois.iana.org",
  29.         "ac" => "whois.nic.ac",
  30.         "ae" => "whois.uaenic.ae",
  31.         "at" => "whois.ripe.net",
  32.         "au" => "whois.aunic.net",
  33.         "be" => "whois.dns.be",
  34.         "bg" => "whois.ripe.net",
  35.         "br" => "whois.registro.br",
  36.         "bz" => "whois.belizenic.bz",
  37.         "ca" => "whois.cira.ca",
  38.         "cc" => "whois.nic.cc",
  39.         "ch" => "whois.nic.ch",
  40.         "cl" => "whois.nic.cl",
  41.         "cn" => "whois.cnnic.net.cn",
  42.         "cz" => "whois.nic.cz",
  43.         "de" => "whois.nic.de",
  44.         "fr" => "whois.nic.fr",
  45.         "hu" => "whois.nic.hu",
  46.         "ie" => "whois.domainregistry.ie",
  47.         "il" => "whois.isoc.org.il",
  48.         "in" => "whois.ncst.ernet.in",
  49.         "ir" => "whois.nic.ir",
  50.         "mc" => "whois.ripe.net",
  51.         "to" => "whois.tonic.to",
  52.         "tv" => "whois.tv",
  53.         "ru" => "whois.ripn.net",
  54.         "org" => "whois.pir.org",
  55.         "aero" => "whois.information.aero",
  56.         "nl" => "whois.domain-registry.nl"
  57.     );
  58.     if (!isset($servers[$ext])){
  59.         die('Error: No matching nic server found!');
  60.     }
  61.     $nic_server = $servers[$ext];
  62.     $output = '';
  63.     // connect to whois server:
  64.     if ($conn = fsockopen ($nic_server, 43)) {
  65.         fputs($conn, $domain."\r\n");
  66.         while(!feof($conn)) {
  67.             $output .= fgets($conn,128);
  68.         }
  69.         fclose($conn);
  70.     }
  71.     else { die('Error: Could not connect to ' . $nic_server . '!'); }
  72.     return $output;
  73. }

10. 不显示PHP错误而发送电子邮件取代之

如果你不想在页面中显示PHP错误，也可以通过email来获取错误信息。下面的代码可以帮助你实现。

  1. <!--?php
  2. // Our custom error handler
  3. function nettuts_error_handler($number, $message, $file, $line, $vars){
  4. $email = "
  5. <p-->An error ($number) occurred on line
  6. <strong>$line</strong> and in the <strong>file: $file.</strong>
  7. <p> $message </p>";
  8. $email .= "<pre class="brush:php;toolbar:false layui-box layui-code-view layui-code-notepad"><ol class="layui-code-ol"><li>" . print_r($vars, 1) . "</li></ol></pre>";
  9. $headers = 'Content-type: text/html; charset=iso-8859-1' . "\r\n";
  10. // Email the error to someone...
  11. error_log($email, 1, 'you@youremail.com', $headers);
  12. // Make sure that you decide how to respond to errors (on the user's side)
  13. // Either echo an error message, or kill the entire project. Up to you...
  14. // The code below ensures that we only "die" if the error was more than
  15. // just a NOTICE.
  16. if ( ($number !== E_NOTICE) && ($number < 2048) ) {
  17. die("There was an error. Please try again later.");
  18. }
  19. }
  20. // We should use our custom function to handle errors.
  21. set_error_handler('nettuts_error_handler');
  22. // Trigger an error... (var doesn't exist)
  23. echo $somevarthatdoesnotexist;

英文原文：10 super useful PHP snippets you probably haven’t seen

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