时讯：php魔术方法是什么

function __constrct([parameter list]){    方法具体实现 //通常为成员变量初始赋值。}

name = $name;            $this->sex = $sex;            $this->age = $age;        }        /**         * say 方法定义         */        public function say()        {            echo "Name：" . $this->name . ",Sex：" . $this->sex . ",Age：" . $this->age;        }       }

$Person1 = new Person();echo $Person1->say(); //显示：Name：,Sex：Male,Age：22

$Person2 = new Person("Jams");echo $Person2->say(); // 显示： Name: Jams, Sex: Male, Age: 22

$Person3 = new Person ("Jack", "Male", 25);echo $Person3->say(); // 显示：Name: Jack, Sex: Male, Age: 25

function __destruct(){    //method body}

name = $name;        $this->sex  = $sex;        $this->age  = $age;    }    /**     * say method     */    public function say()    {        echo "Name：".$this->name.",Sex：".$this->sex.",Age：".$this->age;    }       /**     * declare a destructor method     */    public function __destruct()    {            echo "Well, my name is ".$this->name;    }}$Person = new Person("John");unset($Person); //destroy the object of $Person created above

Well, my name is John

function __call(string $function_name, array $arguments){    // method body}

";    }         function __call($funName, $arguments)    {          echo "The function you called：" . $funName . "(parameter：" ;  // Print the method"s name that is not existed.          print_r($arguments); // Print the parameter list of the method that is not existed.          echo ")does not exist!！
\n";                       }                                         }$Person = new Person();           $Person->run("teacher"); // If the method which is not existed is called within the object, then the __call() method will be called automatically.$Person->eat("John", "apple");             $Person->say();

The function you called: run (parameter: Array([0] => teacher)) does not exist!The function you called: eat (parameter: Array([0] => John[1] => apple)) does not exist!Hello world!

";    }    public static function __callStatic($funName, $arguments)    {        echo "The static method you called：" . $funName . "(parameter：" ;  // 打印出未定义的方法名。        print_r($arguments); // 打印出未定义方法的参数列表。        echo ")does not exist！
\n";    }}$Person = new Person();$Person::run("teacher"); // 如果此项目内不存在的方法被调用了，那么 __callStatic() 方法将被自动调用。$Person::eat("John", "apple");$Person->say();

The static method you called: run (parameter: Array([0] => teacher)) does not exist!The static method you called: eat (parameter: Array([0] => John[1] => apple)) does not exist!Hello world!

name = $name;        $this->age = $age;    }    public function __get($propertyName)    {           if ($propertyName == "age") {            if ($this->age > 30) {                return $this->age - 10;            } else {                return $this->$propertyName;            }        } else {            return $this->$propertyName;        }    }}$Person = new Person("John", 60);   // Instantiate the object with the Person class and assign initial values to the properties with the constructor.echo "Name：" . $Person->name . "
";   // When the private property is accessed, the __get() method will be called automatically,so we can get the property value indirectly.echo "Age：" . $Person->age . "
";    // The __get() method is called automatically，and it returns different values according to the object itself.

Name: JohnAge: 50

name = $name;        $this->age  = $age;    }    public function __set($property, $value) {        if ($property=="age")        {            if ($value > 150 || $value < 0) {                return;            }        }        $this->$property = $value;    }    public function say(){        echo "My name is ".$this->name.",I"m ".$this->age." years old";    }}$Person=new Person("John", 25); //请注意，类初始化并为“name”和“age”分配初始值。$Person->name = "Lili";     // "name" 属性值被成功修改。如果没有__set()方法，程序将报错。$Person->age = 16; // "age"属性修改成功。$Person->age = 160; //160是无效值，因此修改失败。$Person->say();  //输出:My name is Lili, I"m 16 years old。

My name is Lili, I"m 16 years old

name = $name;        $this->age  = $age;        $this->sex  = $sex;    }    /**     * @param $content     *     * @return bool     */    public function __isset($content) {        echo "The {$content} property is private，the __isset() method is called automatically.
";        echo  isset($this->$content);    }}$person = new Person("John", 25); // Initially assigned.echo isset($person->sex),"
";echo isset($person->name),"
";echo isset($person->age),"
";

1The name property is private，the __isset() method is called automatically.1The age property is private，the __isset() method is called automatically.1

name = $name;        $this->age  = $age;        $this->sex  = $sex;    }    /**     * @param $content     *     * @return bool     */    public function __unset($content) {        echo "It is called automatically when we use the unset() method outside the class.
";        echo  isset($this->$content);    }}$person = new Person("John", 25); // Initially assigned.unset($person->sex),"
";unset($person->name),"
";unset($person->age),"
";

It is called automatically when we use the unset() method outside the class.1It is called automatically when we use the unset() method outside the class.1

name = $name;        $this->age  = $age;        $this->sex  = $sex;    }    /**     * @return array     */    public function __sleep() {        echo "It is called when the serialize() method is called outside the class.
";        $this->name = base64_encode($this->name);        return array("name", "age"); // It must return a value of which the elements are the name of the properties returned.    }}$person = new Person("John"); // Initially assigned.echo serialize($person);echo "
";

It is called when the serialize() method is called outside the class.O:6:"Person":2:{s:4:"name";s:8:"5bCP5piO";s:3:"age";i:25;}

name = $name;        $this->age  = $age;        $this->sex  = $sex;    }    /**     * @return array     */    public function __sleep() {        echo "It is called when the serialize() method is called outside the class.
";        $this->name = base64_encode($this->name);        return array("name", "age"); // It must return a value of which the elements are the name of the properties returned.    }    /**     * __wakeup     */    public function __wakeup() {        echo "It is called when the unserialize() method is called outside the class.
";        $this->name = 2;        $this->sex = "Male";        // There is no need to return an array here.    }}$person = new Person("John"); // Initially assigned.var_dump(serialize($person));var_dump(unserialize(serialize($person)));

It is called when the serialize() method is called outside the class.string(58) "O:6:"Person":2:{s:4:"name";s:8:"5bCP5piO";s:3:"age";i:25;}"It is called when the unserialize() method is called outside the class.object(Person)#2 (3) { ["sex"]=> string(3) "Male" ["name"]=> int(2) ["age"]=> int(25) }

name = $name;        $this->age  = $age;        $this->sex  = $sex;    }    public function __toString()    {        return  "go go go";    }}$person = new Person("John"); // Initially assigned.echo $person;

go go go

name = $name;        $this->age  = $age;        $this->sex  = $sex;    }}$person = new Person("John"); // Initially assigned.echo $person;

Catchable fatal error: Object of class Person could not be converted to string in D:\phpStudy\WWW\test\index.php on line 18

name = $name;        $this->age  = $age;        $this->sex  = $sex;    }    public function __invoke() {        echo "This is an object";    }}$person = new Person("John"); // Initially assigned.$person();

This is an object

Fatal error: Function name must be a string in D:\phpStudy\WWW\test\index.php on line 18

name = $name;        $this->age  = $age;        $this->sex  = $sex;    }}$person = new Person("John"); // Initially assigned.var_export($person);

Person::__set_state(array( "sex" => "Male", "name" => "John", "age" => 25, ))

name = $name;        $this->age  = $age;        $this->sex  = $sex;    }    public static function __set_state($an_array)    {        $a = new Person();        $a->name = $an_array["name"];        return $a;    }}$person = new Person("John"); // Initially assigned.$person->name = "Jams";var_export($person);

Person::__set_state(array( "sex" => "Male", "name" => "Jams", "age" => 25, ))

$copy_of_object = clone $object;

name = $name;        $this->age  = $age;        $this->sex  = $sex;    }    public function __clone()    {        echo __METHOD__."your are cloning the object.
";    }}$person = new Person("John"); // Initially assigned.$person2 = clone $person;var_dump("persion1:");var_dump($person);echo "
";var_dump("persion2:");var_dump($person2);

Person::__clone your are cloning the object.string(9) "persion1:" object(Person)#1 (3) { ["sex"]=> string(3) "Male" ["name"]=> string(6) "John" ["age"]=> int(25) }string(9) "persion2:" object(Person)#2 (3) { ["sex"]=> string(3) "Male" ["name"]=> string(6) "John" ["age"]=> int(25) }

/** * file non_autoload.php */require_once("project/class/A.php");require_once("project/class/B.php");require_once("project/class/C.php");...if (ConditionA) {    $a = new A();    $b = new B();    $c = new C();    // …} else if (ConditionB) {    $a = newA();    $b = new B();    // …}

/** * file autoload_demo.php */function  __autoload($className) {    $filePath = “project/class/{$className}.php”;    if (is_readable($filePath)) {        require($filePath);    }}if (ConditionA) {    $a = new A();    $b = new B();    $c = new C();    // …} else if (ConditionB) {    $a = newA();    $b = new B();    // …}

prop = $val;    }    /**     * @return array     */    public function __debugInfo() {        return [            "propSquared" => $this->prop ** 2,        ];    }}var_dump(new C(42));

object(C)#1 (1) { ["propSquared"]=> int(1764) }