If you are new to PHP or just need to refresh your skills, this is the place to start. This series of tutorials will give you the basic knowledge you will need to create a simple PHP website.

PHP is a reflective programming language originally designed for producing dynamic web pages.[1] PHP is used mainly in server-side scripting, but can be used from a command line interface or in standalone graphical applications. Textual User Interfaces can also be created using ncurses.

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XLVII. Function Handling Functions

Introduction

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

Requirements

No external libraries are needed to build this extension.

Installation

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

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Another Useful functions:

ref.funchand |

PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML. If you are new to PHP and want to get some idea of how it works, try the introductory tutorial. After that, check out the online manual, and the example archive sites and some of the other resources available in the links section.