You are using the wrong operator here. Your line will only dispalay errors of type E_ALL and E_NOTICE and E_STRICT. Since an error can not match all three types, none is shown.
Use the or operator
| to include something or the and-not operatr `~&' to exclude something from E_ALL.
error_reporting (E_ALL | E_NOTICE | E_STRICT);
If you are talking about the settings in your php.ini, use this documentation:
; Common Values: ; E_ALL (Show all errors, warnings and notices including coding standards.) ; E_ALL & ~E_NOTICE (Show all errors, except for notices) ; E_ALL & ~E_NOTICE & ~E_STRICT (Show all errors, except for notices and coding standards warnings.) ; E_COMPILE_ERROR|E_RECOVERABLE_ERROR|E_ERROR|E_CORE_ERROR (Show only errors) ; Default Value: E_ALL & ~E_NOTICE & ~E_STRICT & ~E_DEPRECATED ; Development Value: E_ALL ; Production Value: E_ALL & ~E_DEPRECATED & ~E_STRICT ; http://php.net/error-reporting error_reporting = E_ALL
Warning: If you are specifying your error levels somewhere else, ex an apache config, use the numbers behind those constants and NOT the constants!