The Variable-Related functions provide tools for inspecting, transforming, serializing, and deleting variables. Overview PHP's variable-related functions are a key part of the language. Skilled programmers rely on them extensively to build robust code that uses type-checking. Functions such as var_dump() and print_r() are also invaluable when debugging. Here is a quick, task-based overview of the function group:
Configuring Variable-Related FunctionsThe following configuration directives affect how PHP handles variables.
Installing Variable-Related Functions Support These functions are built into PHP by default and can only be disabled by editing the source code and recompiling or by using the disable_functions directive in php.ini. Additional InformationFor more information on variables, types, and the variable -related functions, see:
PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing
(Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch).
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