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# constant

(PHP 4 >= 4.0.4, PHP 5)

constant — Returns the value of a constant

### 설명

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.

### 인수

`name`

  The constant name.

### 반환값

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

### 예제

Example #1 constant() example

`<?php
define("MAXSIZE", 100);
echo MAXSIZE;
echo constant("MAXSIZE"); // same thing as the previous line
interface bar {
const test = 'foobar!';
}
class foo {
const test = 'foobar!';
}
$const = 'test';
var_dump(constant('bar::'. $const)); // string(7) "foobar!"
var_dump(constant('foo::'. $const)); // string(7) "foobar!"
?>`

### 참고

- define() - Defines a named constant
- defined() - Checks whether a given named constant exists
- The section on Constants

connection_timeout
define
Misc. 함수 목록
PHP Manual