･ﾞ･ｸ･ﾃ･ｯ･皈ｽ･ﾃ･ﾉ

ｰﾊｲｼ､ﾎｴﾘｿｾ __construct, __destruct, __call, __callStatic, __get, __set, __isset, __unset, __sleep, __wakeup, __toString, __invoke, __set_state ､ｪ､隍ﾓ __clone ､ﾏ｡｢PHP ･ｯ･鬣ｹ､ﾋ､ｪ､ｱ､�ﾃｼ�ﾘｿﾎﾌｾﾁｰ､ﾇ､ｹ｡｣､ｳ､�鬢ﾎｴﾘｿﾋｴﾘﾏ｢､ｹ､�ﾃﾊﾌ､ﾊｵ｡ﾇｽ､ﾈﾍﾑ､ｹ､��遉�ｭ｡｢･ｯ･鬣ｹﾆ筅ﾋ､ｳ､�鬢ﾎﾌｾﾁｰ､ｭ､ｹ､�ﾘｿ鋿ｮ､ｷ､ﾆ､ﾏ､､､ｱ､ﾞ､ｻ､｣

ｷﾙｹ�

PHP ､ﾏ｡｢__ ､ﾇｻﾏ､ﾞ､�ﾘｿｾ､ﾃｼ�ﾘｿﾈ､ｷ､ﾆﾍｽﾌｷ､ﾆ､､､ﾞ､ｹ｡｣ﾊｸｽｽ､ｵ､�ｿﾆﾃｼ�ﾊｵ｡ﾇｽ､ｬﾍﾗ､ﾈ､ｹ､��遉�ｭ｡｢ __ ､ﾇｻﾏ､ﾞ､�ﾘｿｾ､ﾈﾍﾑ､ｷ､ﾊ､､､ｳ､ﾈ､ｬｿ萓ｩ､ｵ､�ﾞ､ｹ｡｣

sleep ､ﾈ wakeup

serialize() ､ﾏ｡｢･ｯ･鬣ｹ､ﾋﾆﾃｼ�ﾊﾌｾﾁｰ __sleep ､ﾎｴﾘｿｬ､｢､�ｫ､ﾉ､ｦ､ｫ､ｴ､ﾙ､ﾞ､ｹ｡｣､筅ｷ､｢､�ﾐ｡｢･ｷ･�｢･�ｽ､ﾎﾁｰ､ﾋ､ｽ､ﾎｴﾘｿﾂｹﾔ､ｷ､ﾞ､ｹ｡｣､ｳ､ﾎｴﾘｿﾇ｡｢･ｪ･ﾖ･ｸ･ｧ･ｯ･ﾈ､ｯ･�｢､ｹ､�ｳ､ﾈ､ｬ､ﾇ､ｭ､ﾞ､ｹ｡｣､ﾞ､ｿ､ｳ､ﾎｴﾘｿﾏ｡｢･ｷ･�｢･�ｽ､ｹ､�ｪ･ﾖ･ｸ･ｧ･ｯ･ﾈ､ﾋ､ﾄ､､､ﾆ｡｢､ｹ､ﾙ､ﾆ､ﾎﾊﾑｿﾎﾌｾﾁｰ､ﾛﾎﾇﾊﾖ､ｹ､ｳ､ﾈ､ｬﾁｰﾄﾈ､ﾊ､ﾃ､ﾆ､､､ﾞ､ｹ｡｣､ｳ､ﾎ･皈ｽ･ﾃ･ﾉ､ｬｲｿ､簗ﾖ､ｵ､ﾊ､ｫ､ﾃ､ｿｾ�遉ﾏ｡｢NULL ､ｬ･ｷ･�｢･�ｽ､ｵ､�｢E_NOTICE ､ｬﾈｯﾀｸ､ｷ､ﾞ､ｹ｡｣

ﾃ擎ﾕ:
__sleep ､ﾇ｡｢ｿﾆ･ｯ･鬣ｹ､ﾎ private ･ﾗ･愠ﾑ･ﾆ･｣､ﾎﾌｾﾁｰ､ﾖ､ｹ､ｳ､ﾈ､ﾏ､ﾇ､ｭ､ﾞ､ｻ､｣､ｽ､ｦ､ｷ､隍ｦ､ﾈ､ｹ､�ﾈ E_NOTICE ･�ﾙ･�ﾎ･ｨ･鬘ｼ､ﾈ､ﾊ､熙ﾞ､ｹ｡｣､ｳ､ﾎｾ�遉ﾏ｡｢､ｫ､�熙ﾋ Serializable ･､･ｿ｡ｼ･ﾕ･ｧ･､･ｹ､ﾈ､､､ﾞ､ｹ｡｣

ﾅｵｷｿﾅｪ､ﾊ __sleep ､ﾎｻﾈﾍﾑﾋ｡､ﾏ｡｢ﾅﾓﾃ讀ﾎ･ﾇ｡ｼ･ｿ､ｳ･ﾟ･ﾃ･ﾈ､ｷ､ｿ､遙｢ｻｿ､隍ｦ､ﾊ･ｿ･ｹ･ｯ､ﾎ･ｯ･�｢､ﾔ､ｦ､ﾈ､､､ﾃ､ｿ､筅ﾎ､ﾇ､ｹ｡｣､ﾞ､ｿ｡｢･ｪ･ﾖ･ｸ･ｧ･ｯ･ﾈ､ｬﾈ�ﾋﾂ遉ｭ､ｯ｡｢､ｫ､ﾄ｡｢ｴｰﾁｴ､ﾋﾊﾝﾂｸ､ｹ､�ｬﾍﾗ､ｬ､ﾊ､､ｾ�遑｢､ｳ､ﾎｴﾘｿｬﾍｭﾍﾑ､ﾇ､ｹ｡｣

ｵﾕ､ﾋ｡｢unserialize() ､ﾏ｡｢ﾆﾃｼ�ﾊﾌｾﾁｰ __wakeup ､ｭ､ｹ､� ｴﾘｿﾎﾂｸｺﾟ､ｴ､ﾙ､ﾞ､ｹ｡｣､筅ｷﾂｸｺﾟ､ｹ､��遑｢､ｳ､ﾎｴﾘｿﾏ｡｢･ｪ･ﾖ･ｸ･ｧ･ｯ･ﾈ､ｬﾍｭ､ｹ､�ﾄﾇｽﾀｭ､ｬ､｢､�｢､鬢讀��ｽ｡ｼ･ｹ､ﾆｹｽﾃﾛ､ｹ､�ｳ､ﾈ､ｬ､ﾇ､ｭ､ﾞ､ｹ｡｣

ｰﾕｿﾞ､ｵ､�� __wakeup ､ﾎｻﾈﾍﾑﾋ｡､ﾏ｡｢･ｷ･�｢･�ｽ､ﾎｺﾝ､ﾋｼｺ､��ｿ･ﾇ｡ｼ･ｿ･ﾙ｡ｼ･ｹﾀﾜﾂｳ､ﾆﾅﾙｳﾎﾎｩ､ｷ､ｿ､遙｢､ｽ､ﾎﾂｾ､ﾎｺﾆｽ魘�ｽ､ﾔ､ｦ､ｳ､ﾈ､ﾇ､ｹ｡｣

ﾎ�1 Sleep ､ｪ､隍ﾓ wakeup


<?php
class Connection
{
    protected $link;
    private $server, $username, $password, $db;
    
    public function __construct($server, $username, $password, $db)
    {
        $this->server = $server;
        $this->username = $username;
        $this->password = $password;
        $this->db = $db;
        $this->connect();
    }
    
    private function connect()
    {
        $this->link = mysql_connect($this->server, $this->username, $this->password);
        mysql_select_db($this->db, $this->link);
    }
    
    public function __sleep()
    {
        return array('server', 'username', 'password', 'db');
    }
    
    public function __wakeup()
    {
        $this->connect();
    }
}
?>

__toString

__toString ･皈ｽ･ﾃ･ﾉ､ﾋ､隍遙｢･ｯ･鬣ｹ､ｬﾊｸｻ昀ﾋﾊﾑｴｹ､ｵ､��ﾝ､ﾎﾆｰｺ釥隍皃�ｳ､ﾈ､ｬ､ﾇ､ｭ､ﾞ､ｹ｡｣､ｿ､ﾈ､ｨ､ﾐ echo $obj; ､ﾈ､ｷ､ｿ､ﾈ､ｭ､ﾋｲｿ､ｽｼｨ､ｵ､ｻ､�ｫ､ﾈ､､､ﾃ､ｿ､ｳ､ﾈ､ﾇ､ｹ｡｣､ｳ､ﾎ･皈ｽ･ﾃ･ﾉ､ﾏﾊｸｻ昀ﾖ､ｵ､ﾊ､ｱ､�ﾐ､ﾊ､熙ﾞ､ｻ､｣､ｽ､�ﾊｳｰ､ﾎｾ�遉ﾏ E_RECOVERABLE_ERROR ･�ﾙ･�ﾎﾃﾗﾌｿﾅｪ､ﾊ･ｨ･鬘ｼ､ｬﾈｯﾀｸ､ｷ､ﾞ､ｹ｡｣

ﾎ�2 ｴﾊﾃｱ､ﾊﾎ�


<?php
// ｴﾊﾃｱ､ﾊ･ｯ･鬣ｹ､�ﾀ
class TestClass
{
    public $foo;

    public function __construct($foo)
    {
        $this->foo = $foo;
    }

    public function __toString()
    {
        return $this->foo;
    }
}

$class = new TestClass('Hello');
echo $class;
?>

ｾ螟ﾎﾎ网ﾎｽﾐﾎﾏ､ﾏｰﾊｲｼ､ﾈ､ﾊ､熙ﾞ､ｹ｡｣

Hello

ﾃ擎ﾕ､ｬﾉｬﾍﾗ､ﾊ､ﾎ､ﾏ｡｢PHP 5.2.0 ､隍�ｰ､ﾇ､ﾏ｡｢ __toString ･皈ｽ･ﾃ･ﾉ､ﾏ echo() ､ﾞ､ｿ､ﾏ print(). ､ﾈﾄｾﾀﾜｷ�遉ｵ､�ｿｾ�遉ﾎ､ﾟ･ｳ｡ｼ･�ｵ､�ﾆ､､､ｿ､ﾈ､､､ｦ､ｳ､ﾈ､ﾇ､ｹ｡｣ PHP 5.2.0 ｰﾊｹﾟ､ﾇ､ﾏ｡｢､ｳ､�ﾏ､ｹ､ﾙ､ﾆ､ﾎﾊｸｻ昀ｳ･ﾆ･ｭ･ｹ･ﾈ (､ｿ､ﾈ､ｨ､ﾐ printf() ､ﾋ､ｪ､ｱ､� %s ｽ､ｾ�ｻﾒ) ､ﾇ･ｳ｡ｼ･�ｵ､�ﾞ､ｹ｡｣､ｷ､ｫ､ｷ｡｢､ｽ､ﾎﾂｾ､ﾎｷｿ､ﾎ･ｳ･ﾆ･ｭ･ｹ･ﾈ (､ｿ､ﾈ､ｨ､ﾐ %d ｽ､ｾ�ｻﾒ) ､ﾇ､ﾏ･ｳ｡ｼ･�ｵ､�ﾞ､ｻ､｣ PHP 5.2.0 ｰﾊｹﾟ､ﾇ､ﾏ｡｢__toString ･皈ｽ･ﾃ･ﾉ､�､ﾃ､ﾆ､､､ﾊ､､･ｪ･ﾖ･ｸ･ｧ･ｯ･ﾈ､ｸｻ昀ﾋﾊﾑｴｹ､ｷ､隍ｦ､ﾈ､ｹ､�ﾈ E_RECOVERABLE_ERROR ､ｬﾈｯﾀｸ､ｷ､ﾞ､ｹ｡｣

__invoke

__invoke ･皈ｽ･ﾃ･ﾉ､ﾏ｡｢･ｹ･ｯ･�ﾗ･ﾈ､ｬ･ｪ･ﾖ･ｸ･ｧ･ｯ･ﾈ､ﾘｿﾈ､ｷ､ﾆ･ｳ｡ｼ･�ｷ､隍ｦ､ﾈ､ｷ､ｿｺﾝ､ﾋ･ｳ｡ｼ･�ｵ､�ﾞ､ｹ｡｣

ﾃ擎ﾕ:
､ｳ､ﾎｵ｡ﾇｽ､ﾏ PHP 5.3.0 ｰﾊｹﾟ､ﾇｻﾈﾍﾑｲﾄﾇｽ､ﾇ､ｹ｡｣

ﾎ�3 __invoke ､ﾎｻﾈﾍﾑ


<?php
class CallableClass
{
    public function __invoke($x)
    {
        var_dump($x);
    }
}
$obj = new CallableClass;
$obj(5);
var_dump(is_callable($obj));
?>

ｾ螟ﾎﾎ网ﾎｽﾐﾎﾏ､ﾏｰﾊｲｼ､ﾈ､ﾊ､熙ﾞ､ｹ｡｣

int(5)
bool(true)

__set_state

､ｳ､ﾎ static ･皈ｽ･ﾃ･ﾉ､ﾏ｡｢ PHP 5.1.0 ｰﾊｹﾟ､ﾇ var_export() ､ﾋ､隍ﾃ､ﾆ･ｨ･ｯ･ｹ･ﾝ｡ｼ･ﾈ､ｵ､�ｿ･ｯ･鬣ｹ､ﾎ､ｿ､皃ﾋ･ｳ｡ｼ･�ｵ､�ﾞ､ｹ｡｣

､ｳ､ﾎ･皈ｽ･ﾃ･ﾉ､ﾎﾍ｣ｰ�ﾎ･ﾑ･鬣癸ｼ･ｿ､ﾏ｡｢･ｨ･ｯ･ｹ･ﾝ｡ｼ･ﾈ､ｵ､�ｿ･ﾗ･愠ﾑ･ﾆ･｣､� array('property' => value, ...) ､ﾎｷﾁｼｰ､ﾇﾊﾝｻ�､ｹ､�ﾛﾎﾇ､ｹ｡｣

ﾎ�4 __set_state ､ﾎｻﾈﾍﾑﾋ｡ (PHP 5.1.0 ｰﾊｹﾟ)


<?php

class A
{
    public $var1;
    public $var2;

    public static function __set_state($an_array) // PHP 5.1.0 ｰﾊｹﾟ
    {
        $obj = new A;
        $obj->var1 = $an_array['var1'];
        $obj->var2 = $an_array['var2'];
        return $obj;
    }
}

$a = new A;
$a->var1 = 5;
$a->var2 = 'foo';

eval('$b = ' . var_export($a, true) . ';'); // $b = A::__set_state(array(
                                            //    'var1' => 5,
                                            //    'var2' => 'foo',
                                            // ));
var_dump($b);

?>

ｾ螟ﾎﾎ网ﾎｽﾐﾎﾏ､ﾏｰﾊｲｼ､ﾈ､ﾊ､熙ﾞ､ｹ｡｣

object(A)#2 (2) {
  ["var1"]=>
  int(5)
  ["var2"]=>
  string(3) "foo"
}