constant
(PHP 4 >= 4.0.4, PHP 5)
constant — Returns the value of a constant
Description
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.
Parameters
-
name
-
The constant name.
Return Values
Returns the value of the constant, or NULL if the constant is not
defined.
Examples
Example #1 constant() example
<?php
define("MAXSIZE", 100);
echo MAXSIZE;
echo constant("MAXSIZE"); interface bar {
const test = 'foobar!';
}
class foo {
const test = 'foobar!';
}
$const = 'test';
var_dump(constant('bar::'. $const)); var_dump(constant('foo::'. $const)); ?>
connection_timeout
