Smarty::muteExpectedErrors() — mutes expected warnings and notices deliberately generated by Smarty
string muteExpectedErrors();
muteExpectedErrors() registers a custom error handler using set_error_handler().
The error handler merely inspects $errno and $errfile to determine if the given error
was produced deliberately and must be ignored, or should be passed on to the next error handler.
Smarty::unmuteExpectedErrors() removes the current error handler. Please note, that if you've registerd any custom error handlers
after the muteExpectedErrors() call, the unmute will not remove Smarty's muting error handler, but the one registered last.