PHP Magic Methods and Constants

In PHP, We have many features and pre-defined methods to represent our needs. This topic one of the most powerful and precisious element, which we frequently used in PHP.

1. Magic Methods.


2. Magic Constants.


3. Magic QUOTES (magic_quotes_gpc,  magic_quotes_runtime, magic_quotes_sybase) - This feature is REMOVED on PHP 5.4

Magic Methods :

1. __construct() 
2. __destruct() 
3. __call() 
4. __callStatic() 
5. __get() 
6. __set() 
7. __isset() 
8. __unset() 
9. __sleep() 
10. __wakeup() 
11. __toString() 
12. __invoke() 
13. __set_state() 
14. __clone()

Magic Constants :

Name	Description
__LINE__	The current line number of the file.
__FILE__	The full path and filename of the file. If used inside an include, the name of the included file is returned. Since PHP 4.0.2, __FILE__ always contains an absolute path with symlinks resolved whereas in older versions it contained relative path under some circumstances.
__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. (Added in PHP 5.3.0.)
__FUNCTION__	The function name. (Added in PHP 4.3.0) As of PHP 5 this constant returns the function name as it was declared (case-sensitive). In PHP 4 its value is always lowercased.
__CLASS__	The class name. (Added in PHP 4.3.0) As of PHP 5 this constant returns the class name as it was declared (case-sensitive). In PHP 4 its value is always lowercased. The class name includes the namespace it was declared in (e.g. Foo\Bar). Note that as of PHP 5.4 __CLASS__ works also in traits. When used in a trait method, __CLASS__ is the name of the class the trait is used in.
__TRAIT__	The trait name. (Added in PHP 5.4.0) As of PHP 5.4 this constant returns the trait as it was declared (case-sensitive). The trait name includes the namespace it was declared in (e.g. Foo\Bar).
__METHOD__	The class method name. (Added in PHP 5.0.0) The method name is returned as it was declared (case-sensitive).
__NAMESPACE__	The name of the current namespace (case-sensitive). This constant is defined in compile-time (Added in PHP 5.3.0).