Runtime Configuration

The behaviour of these functions is affected by settings in php.ini.

Variables Configuration Options

Name	Default	Changeable	Changelog
unserialize_callback_func	NULL	PHP_INI_ALL	Available since PHP 4.2.0.

For further details and definitions of the PHP_INI_* modes, see the Where a configuration setting may be set.

Here's a short explanation of the configuration directives.

unserialize_callback_func string

The unserialize() callback function will called (with the undefined class' name as parameter), if the unserializer finds an undefined class which should be instantiated. A warning appears if the specified function is not defined, or if the function doesn't include/implement the missing class. So only set this entry, if you really want to implement such a callback-function.

See also unserialize().