No external libraries are needed to build this extension.
There is no installation needed to use these functions; they are part of the PHP core.
The behaviour of these functions is affected by settings in php.ini.
Table 1. Variables Configuration Options
|unserialize_callback_func||NULL||PHP_INI_ALL||Available since PHP 4.2.0.|
Here's a short explanation of the configuration directives.
The unserialize() callback function will called (with the undefined class' name as parameter), if the unserializer finds an undefined class which should be instanciated. 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().
This extension has no resource types defined.
This extension has no constants defined.