void PEAR_ErrorStack::pushCallback (
string|array $cb
)
The return value must be one of the PEAR_ERRORSTACK_* constants.
This functionality can be used to emulate PEAR's pushErrorHandling, and the PEAR_ERROR_CALLBACK mode, without affecting the integrity of the error stack or logging
$cb
throws no exceptions thrown
see PEAR_ErrorStack::popCallback()
see PEAR_ERRORSTACK_PUSHANDLOG, PEAR_ERRORSTACK_PUSH, PEAR_ERRORSTACK_LOG
This function can not be called statically.