Uopz Functions
PHP Manual

uopz_undefine

Undefine a constant

Description

void uopz_undefine ( string $class , string $constant )
void uopz_undefine ( string $constant )

Removes the constant at runtime

Parameters

class

The name of the class containing constant

constant

The name of an existing constant

Return Values

Examples

Example #1 uopz_undefine example

<?php
define("MY", true);

uopz_undefine("MY");

var_dump(defined("MY"));
?>

The above example will output something similar to:

bool(false)