PHP methods for server-side predefined variable invocation and string processing

This article mainly introduces the PHP simple anti-theft chain implementation method, involving PHP for the server-side pre-defined variable invocation and string processing of the relevant skills, with a certain reference value, the need for friends can refer to the next

Specific as follows:

<?php$admin = Array (  ' defaulturl ' = ' http://blog.qita.in/images/banner-header.gif ',  //hotlinking return address  ' Url_1 '   = ' http://blog.qita.in/file ',  ' url_2 ' = '   http://blog.qita.in/file1 ', '; $okaysites = Array (' http://qita.in ',  ' http://blog.qita.in ',//White list  ' http://blog.qita.in/1.html ',); $reffer = $_server[' Http_referer '];if ($reffer) {  $yes = 0;  while (list ($domain, $subarray) = each ($okaysites)) {    if (Ereg ($subarray, "$reffer")) {      $yes = 1;    }  }  $theu = ' url_ '. $_get[' site ';  $file = $_get[' file '];  if ($ADMIN [$theu] and $yes = = 1) {  header ("Location: $ADMIN [$theu]/$file"),  } else {    header ("Location: $ Admin[defaulturl] ");}  } else {  header ("Location: $ADMIN [Defaulturl]");} Print_r ($_server[' http_referer ');? >

Summary : The above is the entire content of this article, I hope to be able to help you learn.

Related recommendations:

PHP Three recursive function implementation method

The function of using curl to forge IP in PHP

PHP Simulation method of response class in ASP