There are several methods to solve errors in PHP code. Sometimes when the user waits to see an output a blank page will be shown if there is an error. To show the errors E_ALL^E_STRICT is used for the PHP 5 version. Contrarily, remaining versions just use E_ALL.

He talks about the log_errors and display_errors settings in your php.ini, the error_reporting function call or a custom error handler as shown in this example from the PHP manual.