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XXIV. Function Handling Functions
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Function Handling Functions

The function-handling functions provide developers with tools to call, define, and test functions.

The function-handling functions are a core part of PHP. They allow the programmer to easily do the following tasks:

- Dynamically call and build functions at runtime

- Create functions that accept variable-length argument lists

- Ensure that a function is defined in the current scope

- Call functions arbitrarily at the end of a script

Table of Contents

call_user_func_array
call_user_func
create_function
func_get_arg
func_get_args
func_num_args
function_exists
get_defined_functions
register_shutdown_function

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PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing (Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch). This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at http://www.opencontent.org/openpub/). The authors of this book have elected not to choose any options under the OPL. This online book was obtained from http://www.fooassociates.com/phpfer/ and is designed to provide information about the PHP programming language, focusing on PHP version 4.0.4 for the most part. The information is provided on an as-is basis, and no warranty or fitness is implied. All persons and entities shall have neither liability nor responsibility to any person or entity with respect to any loss or damage arising from the information contained in this book.