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Function Handling Functions


These functions all handle various operations involved in working with functions.


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.

Runtime Configuration

This extension has no configuration directives defined in php.ini.

Predefined Constants

This extension has no constants defined.

Table of Contents

call_user_func_array — Call a user function given with an array of parameters
call_user_func — Call a user function given by the first parameter
create_function — Create an anonymous (lambda-style) function
func_get_arg — Return an item from the argument list
func_get_args — Returns an array comprising a function's argument list
func_num_args — Returns the number of arguments passed to the function
function_exists — Return TRUE if the given function has been defined
get_defined_functions — Returns an array of all defined functions
register_shutdown_function — Register a function for execution on shutdown
register_tick_function — Register a function for execution on each tick
unregister_tick_function — De-register a function for execution on each tick