PW a back door method to analyze _php skills

PW a way to put the back door

Data\bbscache\admin_record.php is a record of the background landing and operation, we see how to operate this file:

admin\admincp.php:

$bbsrecordfile =d_p. " Data/bbscache/admin_record.php ";
if (!file_exists ($bbsrecordfile)) {
Writeover ($bbsrecordfile, "<?php die;" >\n ");
}//this if it simply says that if there is no admin_record.php the code generates a

If we just edit admin_record.php put <?php die;? > this to delete it:)

Let's take a look at our code miscellaneous write admin_record.php

You landed in the background http://localhost/PHPWind_GBK_6.0RC/upload/admin.php
A random user login with the wrong log will have the following record:

|admin|s| Logging failed|127.0.0.1|1191667510|

Oh, so we can write our code through this, but here is the filter can not be used <

So our back door should stay like this: <?php die;? > Changed to <?php/*die;? >