Uopz Functions
PHP Manual

uopz_undefine

Undefine a constant

Description

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

Returns true on success or false on failure.

Examples

Example #1 uopz_undefine example

<?php
define("MY", true);

uopz_undefine("MY");

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

The above example will output:

bool(false)