PHP Magic Constant examle - Phptpoint.com

PHP:Magic Constant

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PHP Magic Constant

There are a number of predefined constants available to your scripts.
We will use these constants as we need them; there’s a sample:

PHP: Magic Constant

PHP Magic Constant
__LINE__ The current line number of the file.
__FILE__ The full path and filename of the file.
__FUNCTION__ The function name
__CLASS__ The class name
__METHOD__ The class method name
PHP_VERSION The PHP version
PHP_INT_MAX The PHP integer value limit

__LINE__

The current line number of the file.

Output
The Line number : 2

__FILE__

The full path and filename of the file.

Output
Your file name : C:xampplitehtdocsmagic_constantfile.php

__FUNCTION__,     __CLASS__,     __METHOD__

The function name
The class name
The class method name

Output
Function of demo class : test
Method of demo class : demo::testme
Class : demo

PHP_VERSION

The PHP version

Output
Current PHP Version you are using : 5.3.1

PHP_INT_MAX

The PHP integer value limit

Output
Integer Maximum Value : 2147483647