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constant

constant

(PHP 4 >= 4.0.4, PHP 5)

constant -- Returns the value of a constant

Opis

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.

Parametry

name

The constant name.

Zwracane wartości

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

Przykłady

Przykład 1. constant() example

<?php

define
("MAXSIZE", 100);

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

?>

Patrz także

define()
defined()
The section on Constants