PHP 매직 상수 소개 및 매직 함수 사용 코드 설명 요약

class test1 { 
public function construct() { 
var_dump(function); 
} 
public function destruct() { 
var_dump(function); 
} 
} 
$t1 = new test1 ; 
unset($t1);

class test2 { 
public $name3; 
public function set($key, $value) { 
var_dump(function. ' 
KEY:' 
.$key.' 
Value:' 
.$value); 
} 
public function get($key) { 
var_dump(function. 'KEY:'.$key); 
} 
public function isset($key) { 
var_dump(function. ' KEY:'.$key); 
} 
public function unset($key) { 
var_dump(function. ' KEY:'.$key); 
} 
} 
$t =new test2 ; 
$t->name = "steven"; 
$t->name2; 
$t->name3; 
isset($t->name2); 
isset($t->name3); 
unset($t->name4);

class test3 { 
public $name = "steven"; 
public $id = "1"; public $id2; 
public function sleep() { 
var_dump(function); // 序列化不成功.没有返回值.反序列也失败 // 
return array("name"); // 序列化成功.有返回值.反序列成功.id2属性能被恢复 // 
return array("name", "id2");// 序列化成功.有返回值.反序列成功.id2属性不能被恢复 
return array("name"); } 
public function testEcho() { 
var_dump($this->name); 
var_dump($this->id); 
var_dump($this->id2); 
} 
public function wakeup() { 
var_dump(function); 
$this->testEcho(); 
} 
} 
$t3= new test3 ; 
$t3->id2 = uniqid(); 
$t3s = serialize($t3); 
unserialize($t3s);

class test4 { 
public function toString() { 
return "toString"; 
} 
} 
$t4 = new test4(); 
echo $t4; 
print $t4; 
var_dump($t4); 
print_r($t4);

class test5 { 
public function call($func, $param) { 
var_dump('Function:'.$func); 
var_dump($param); 
} 
} 
$t5 = new test5; 
$t5->echoTest('xx','xx','xx');

class test51 { 
public function callStatic($fun, $param) { 
var_dump('Function:'.$func); 
var_dump($param); 
} 
} 
test51::test('xx','xx','xx');

class test6 { 
public function set_state($arr){ 
var_dump($arr); 
} 
} 
$t6 = new test6; 
$t6->age = "12"; 
var_export($t6, true); 
var_export($t6); 
eval(' 
$b=' 
.var_export($t6,true).';'); 
print_r($b);

class test71 { 
public $age = 10; 
} 
$t71 = new test71(); 
$t72 = $t71 ; 
var_dump($t71->age) ; 
$t71->age =12 ; 
var_dump($t71->age) ; 
var_dump($t72->age) ; // 如果要以实际值来传递，则需要用到clone关键词 $t73 = clone $t71; $t71->age = 13 ; var_dump($t71->age) ; 
var_dump($t73->age) ; // 如果实例中的某个成员属性也是个实例，那么这个成员属性还是会以引用方法被传递到新的实例。