- var_dump: documentation ( source)
- fread: documentation ( source)
- fopen: documentation ( source)
<?php
$file = fopen("http://dl2.fileswap.com/download/?id=2GODxaob1eMfta1pzHnbvp7mhcQ13bDuF%2FmPyxsN5GkWXZ%2FBNy94G0hFsPKPyxc2%2BkLV1ypIWbh6y5TOYeXmsld8i3DRzImytcA4kJqfJFshZ7zKPXYSx0LKwYMrldSf&h=7465ce61c7ed37dbd3634ceb9933447c&t=52efbf1a", "rb");
$signature = fread($this->fileHandle, 3);
if ($signature[0] === chr(0x46) && $signature[1] === chr(0x4C) && $signature[2] === chr(0x56))
{
var_dump("YAY, it's an FLV");
}