PHP OOP – 析构函数
PHP - __destruct 函数
当对象被破坏或脚本停止或退出时，会调用一个析构函数。
如果你创建了一个__destruct()函数，PHP会在脚本结束时自动调用这个函数。
请注意，destruct 函数以两个下划线 (__) 开头！
下面的例子有一个__construct()函数，当你从一个类创建一个对象时会自动调用，还有一个__destruct()函数会在脚本结束时自动调用：
实例
<?php
class Fruit {
public $name;
public $color;
function __construct($name) {
$this->name = $name;
}
function __destruct() {
echo "The fruit is {$this->name}.";
}
}
$apple = new Fruit("Apple");
?>
亲自试一试 »
class Fruit {
public $name;
public $color;
function __construct($name) {
$this->name = $name;
}
function __destruct() {
echo "The fruit is {$this->name}.";
}
}
$apple = new Fruit("Apple");
?>
另一个例子：
实例
<?php
class Fruit {
public $name;
public $color;
function __construct($name, $color) {
$this->name = $name;
$this->color = $color;
}
function __destruct() {
echo "The fruit is {$this->name} and the color is {$this->color}.";
}
}
$apple = new Fruit("Apple", "red");
?>
亲自试一试 »
class Fruit {
public $name;
public $color;
function __construct($name, $color) {
$this->name = $name;
$this->color = $color;
}
function __destruct() {
echo "The fruit is {$this->name} and the color is {$this->color}.";
}
}
$apple = new Fruit("Apple", "red");
?>
提示：构造函数和析构函数有助于减少代码量，它们非常有用！
