PHP Magic Constants __method__ Introduction, Constants __method__php Tutorials

PHP Magic constant __method__ Introduction, constant __method_

__method__ is a new magic constant after PHP5, representing the name of the class grammar. The magic constant is a PHP predefined constant, its value can be changed, PHP's other existing magic constants have __line__, __file__, __function__, __class__ and so on.

Here is a small piece of code to illustrate the use of __method__.

<?phpclass chhua{function Test () {echo __method__;}} $e =new Chhua (); $e->test ();//output: Chhua::test

How to use PHP Magic constants

Directly with
For example
Want to get the script file location
__file__;

Q. In PHP, where is the magic constant file? How can I see what the Magic constants are defined for?

Magic Constants
The current line number in the __line__ file.
The full path and file name of the __file__ file. If used in the included file, returns the file name that is included. From PHP 4.0.2, __file__ always contains an absolute path (if it is a symbolic connection, the resolved absolute path), and the previous version sometimes contains a relative path.
The directory where the __dir__ file resides. If used in the included file, returns the directory where the included files are located. It is equivalent to DirName (__file__). Unless it is a root directory, the name in the directory does not include the trailing slash. (New in PHP 5.3.0) =
__function__ function name (PHP 4.3.0 new addition). From PHP 5 This constant returns the name (case-sensitive) when the function is defined. In PHP 4, this value is always in lowercase letters.
The name of the __class__ class (PHP 4.3.0 new addition). From PHP 5 This constant returns the name of the class when it is defined (case-sensitive). In PHP 4, this value is always in lowercase letters. The class name includes its declared action area (for example, Foo\bar). Note since PHP 5.4, __CLASS__ has also worked for trait. When used in the trait method, __class__ is the name of the class that invokes the trait method.
__trait__ TRAIT's name (PHP 5.4.0 new addition). From PHP 5.4 This constant returns the name of the trait when it is defined (case-sensitive). The Trait name includes its declared function area (for example, Foo\bar).
The method name of the __method__ class (PHP 5.0.0 new addition). Returns the name of the method when it is defined (case-sensitive).
__NAMESPACE__ the name of the current namespace (case sensitive). This constant is defined at compile time (PHP 5.3.0 is new).

Magic method
__construct (), __destruct (), __call (), __callstatic (), __get (), __set (), __isset (), __unset (), __sleep (), __wakeup (), __ ToString (), __invoke (), __set_state (), and __clone () are called "Magic methods" in PHP. You cannot use these method names when naming your own class methods, unless you want to use their magic features.

In general, these are the few

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