PHP OOP Magic Method

1, __construct (): constructor, new object, automatically called

[Public] function __construct ($name ="") {     $this, name = $name;} 

2, __destruct (): destructor, automatically called when an object is destroyed

function __destruct () {     "";}

3. __get (): called automatically when accessing private properties in a class. Pass the Read property name, return the $this-> property name

 function __get ($key) {
             switch ($key) {
                 case ' name ': 
                     return $this $key ." (This is the text added when __get reads) "; 
                 case ' age ': 
                      return "0". $this $key; 
                 default: 
                      return $this $key; 
             } 
             return $this $key; 
         }  

4, __set (): Automatically called when assigning a value to a class's private property. Passing property names and property values that need to be set

function __set ($key, $value) {     if($key = ="name") {  $ 　　 $key = $value. " (This is the text on the __set setting!) )";                return ;            }                        $$key = $value;}

5, __isset (): Automatically called when the object private property is detected using Isset (). Pass the detected property name, return Isset ($this property name)

         function __isset ($name) {            if($name = ="sex"return ;             return isset ($this,$name);        }    

6. __unset (): Automatically called when the object private property is deleted using unset (). Pass the deleted function name, execute unset ($this-property name) in the method

        function __unset ($name) {            if($name = ="name")                { " <span style= ' color:red; ' > haha name you can't erase! </span><br>";                 return ;            }             Unset ($$name);        }

7. __tostring (): Automatically called when using Echo to print an object. Returns the content that you want to display when you print the object, which must be a string

        function __tostring () {            = <<<str            The object properties you want to print are as follows:<br/> =             > {$this->name};<br/>            = = {$ this->age};<br/>str            ; return $str;        }        

8, __call (): called automatically when a method that is undefined or not exposed in a class is invoked. Pass the called function name, and the parameter list array

function         __call ($funcName, $funcParams) {            " functions you call: {$funcName}, parameter list " ;            print_r ($funcParams)        }    

9, __clone (): When cloning an object using the Clone keyword, it is called automatically. The function is to initialize the newly cloned object to be assigned the value

        function __clone () {            $this" John Doe ";        }

10, __sleep (): Automatically called when the object is deserialized. Returns an array in which the values in the array are the properties that can be serialized

        function __sleep () {            return Array ("name","age ");  // only name/age two properties can be serialized        }

11, __wakeup (): Automatically called when the object is deserialized. Initializes the newly-generated object for initialization assignment

        function __wakeup () {            $this" John Doe ";        }

12, __autoload (): You need to declare a function outside the class. Called automatically when an undeclared class is instantiated. Pass the instantiated class name and use the class name to load the corresponding class file automatically

    function __autoload ($className) {        include Strtolower ($className). " . class.php "     }

PHP OOP Magic Method