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constant

constant

(PHP 4 >= 4.0.4, PHP 5)

constant -- Returns the value of a constant

Popis

mixed constant ( string name )

Return the value of the constant indicated by name.

constant() is useful if you need to retrieve the value of a constant, but do not know its name. I.e. it is stored in a variable or returned by a function.

This function works also with class constants.

Seznam parametrů

name

The constant name.

Návratové hodnoty

Returns the value of the constant, or NULL if the constant is not defined.

Příklady

Příklad 1. constant() example

<?php

define
("MAXSIZE", 100);

echo
MAXSIZE;
echo
constant("MAXSIZE"); // same thing as the previous line

?>

Viz také

define()
defined()
The section on Constants