PHP get, check class name, function name, method name function method, PHP functions name _php Tutorial

PHP Get, check the class name, function name, method name of the function method, PHP functions name

1.function_exists ()-Return TRUE If the given function has been defined
2.is_callable ()-detects if the parameter is a legitimate callable structure
3.class_exists ()-Checks if the class is defined
4.method_exists ()-Checks if the method of the class exists

__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 method name of the __method__ class (PHP 5.0.0 new addition). Returns the name of the method when it is defined (case-sensitive).

Note: These constants are preceded by a two underscore.

Get_class (class name);//Gets the name of the class that contains the current statement
Get_class_methods (class name);//Get all the method names of class name classes and make up an array
Get_class_vars (class name);//Get all the highlighted names of class name classes and form an array

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