Magento How to debug blank white screen

This is how I got it corrected(Hope will help you guys): Use the following code in your index.php file ini_set(‘error_reporting’, E_ERROR); register_shutdown_function(“fatal_handler”); function fatal_handler() { $error = error_get_last(); echo(“<pre>”); print_r($error); } In my case it tolde me that error/503.php was unavailable. 3.The issue was with testimonial extension I used(http://www.magentocommerce.com/magento-connect/magebuzz-free-testimonial.html) I deleted the testimonial.xml file in … Read more