PHP workshop for 2 days with Shopware, Sylius, PHPUnit and Codeception in Duisburg

Magic constants

There are nine magical constants that change depending on where they are used. For example, the value of __LINE__ depends on the line that it's used on in your script. All these "magical" constants are resolved at compile time, unlike regular constants, which are resolved at runtime. These special constants are case-insensitive and are as follows:

PHP's magic constants
Name Description
__LINE__ The current line number of the file.
__FILE__ The full path and filename of the file with symlinks resolved. If used inside an include, the name of the included file is returned.
__DIR__ The directory of the file. If used inside an include, the directory of the included file is returned. This is equivalent to dirname(__FILE__). This directory name does not have a trailing slash unless it is the root directory.
__FUNCTION__ The function name, or {closure} for anonymous functions.
__CLASS__ The class name. The class name includes the namespace it was declared in (e.g. Foo\Bar). When used in a trait method, __CLASS__ is the name of the class the trait is used in.
__TRAIT__ The trait name. The trait name includes the namespace it was declared in (e.g. Foo\Bar).
__METHOD__ The class method name.
__NAMESPACE__ The name of the current namespace.
ClassName::class The fully qualified class name.

add a note add a note

User Contributed Notes 1 note

up
0
sham dot hrm at gmail dot com
7 months ago
You can implement magic constants as given below example:

<?php
namespace UserModel {
    class
User {
        public function
__construct() {
            echo
'I am in '.__CLASS__.'</br>';
        }
        public function
showData() {
            echo
'I am in '.__METHOD__.'</br>';
        }
    }
   
   
$obj = new User;
   
$obj->showData();
    echo
__NAMESPACE__;
}
?>
To Top