Warning: fread() [function.fread]:
Length parameter must be greater than 0. 
in your_domain/xxxx.php on line xxx

根据自己的PHP版本修改:
<?php
//$MAGIC1 = (int)0x950412de; //bug in PHP 5
//$MAGIC1 = (int) - 1794895138; //bug in PHP 4.4.0
$MAGIC1 = 2500072158;

//$MAGIC2 = (int)0xde120495; //bug in PHP 5
//$MAGIC2 = (int) - 569244523;// bug in PHP 4.4.0
$MAGIC2 = 3725722773;