enable all php errors

PHP
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);error_reporting(E_ALL);
ini_set('display_errors', '1');
// Report all PHP errors
error_reporting(E_ALL);
//or
error_reporting(-1);
//or
error_reporting(0);
Source

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