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constant

Description

The constant of Miscellaneous for PHP returns the value of a constant.

Syntax

constant(
    string $name
): mixed

Parameters

name

The constant name.

Return

Returns the value of the constant.

Examples

1

<?

$name = 'MYCONSTANT';
$value = 100;

define($name, $value);

$return = constant($name);

echo $return;

100

2

<?

define('MYCONSTANT', 100);

echo constant('MYCONSTANT');

100

3

<?

define('MYCONSTANT', 100);

echo MYCONSTANT;

100

4

<?

const MYCONSTANT = 100;

echo constant('MYCONSTANT');

100

5

<?

const MYCONSTANT = 100;

echo MYCONSTANT;

100

6

<?

interface myinterface
{
    const MYCONSTANT = 'some';
}
class myclass
{
    const MYCONSTANT = 'test';
}

echo constant('myinterface::MYCONSTANT') . PHP_EOL;
echo constant('myclass::MYCONSTANT');

some
test

7

<?

interface myinterface
{
    const MYCONSTANT = 'some';
}
class myclass
{
    const MYCONSTANT = 'test';
}

$name = 'MYCONSTANT';

echo constant('myinterface::' . $name) . PHP_EOL;
echo constant('myclass::' . $name);

some
test