Error Reporting

As of PHP 5 the error reporting constant
E_STRICT is available, with the value
2048. When enabled, messages will be issued to warn you
about code usage which is deprecated or which may not be
future-proof.

Note: E_ALL does not include
E_STRICT, so it’s not enabled by
default. You must explicitly set the error reporting level to
include E_STRICT in order to see
these messages.

See Predefined Constants for more information.