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Home > Backend Development > PHP Tutorial > URL shortener URL shortener

URL shortener URL shortener

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Release： 2016-07-25 09:07:53
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1178 people have browsed it

This is an online code that does not require a database. The URL to be shortened is stored in a txt file in the same directory.
Demonstration: http://www.ucmbaa.org/u/
The first purpose is to shorten the URL, and the second is to prevent search engines from recognizing this address.

  3. /*
  4. location of file to store URLS
  5. */
  6. $file = 'urls.txt';
  8. /*
  9. use mod_rewrite: 0 - no or 1 - yes
  10. */
  11. $use_rewrite = 1;
  13. /*
  14. language/style/output variables
  15. */
  17. $l_url = 'URL';
  18. $l_nourl = 'No URL address entered';
  19. $l_yoururl = 'Your short URL:';
  20. $l_invalidurl = 'Invalid URL.';
  21. $l_createurl = ' Generate short URL';
  23. ////////////////////// NO NEED TO EDIT BELOW /////////////////// //
  25. if(!is_writable($file) || !is_readable($file))
  26. {
  27. die('Cannot write or read from file. Please CHMOD the url file (urls.txt) by default to 777 and make sure it is uploaded.');
  28. }
  30. $action = trim($_GET['id']);
  31. $action = (empty($action) || $action == '') ? 'create' : 'redirect';
  33. $valid = "^(https?|ftp)://([a-z0-9+!*(),;?&=$_.-]+(:[a-z0- 9+!*(),;?&=$_.-]+)?@)?[a-z0-9+$_-]+(.[a-z0-9+$_-]+)* (:[0-9]{2,5})?(/([a-z0-9+$_-].?)+)*/?(?[a-z+&$_.-][ a-z0-9;:@/&%=+$_.-]*)?(#[a-z_.-][a-z0-9+$_.-]*)?$";
  35. $output = '';
  37. if($action == 'create')
  38. {
  39. if(isset($_POST['create']))
  40. {
  41. $url = trim($_POST['url']) ;
  43. if($url == '')
  44. {
  45. $output = $l_nourl;
  46. }
  47. else
  48. {
  49. if(eregi($valid, $url))
  50. {
  51. $fp = fopen($file, 'a');
  52. fwrite($fp, "{$url}rn");
  53. fclose($fp);
  55. $id = count(file($file));
  56. $dir = dirname($_SERVER[ 'PHP_SELF']);
  57. $filename = explode('/', $_SERVER['PHP_SELF']);
  58. $filename = $filename[(count($filename) - 1)];
  60. $shorturl = ($ use_rewrite == 1) ? "http://{$_SERVER['HTTP_HOST']}{$dir}{$id}" : "http://{$_SERVER['HTTP_HOST']}{$dir}{$ filename}?id={$id}";
  62. $output = "{$l_yoururl} {$shorturl}";
  63. }
  64. else
  65. {
  66. $output = $l_invalidurl;
  67. }
  68. }
  69. }
  70. }
  72. if($action == 'redirect')
  73. {
  74. $urls = file($file);
  75. $id = trim ($_GET['id']) - 1;
  76. if(isset($urls[$id]))
  77. {
  78. header("Location: {$urls[$id]}");
  79. exit;
  80. }
  81. else
  82. {
  83. die('Script error');
  84. }
  85. }
  87. ///////////////////// FEEL FREE TO EDIT BELOW /////// /////////////
  88. ?>

  91. The short URL service can help you shorten a long URL, making it easier for you to share the link on social networks and Weibo.

  94. < p class="response">

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