SPL之SplObjectStorage對象存儲
阿新 • • 發佈：2018-04-24
php spl SplObjectStorage 對象存儲 <?php
/**
* Created by PhpStorm.
* User: zrj
* Date: 18-4-24
* Time: 下午8:37
*/
class Person
{
public $name;
public function __construct(string $name)
{
$this->name = $name;
}
}
//實例化對象
$zhangsan = new Person('張三');
$lisi = new Person('李四');
$wangwu = new Person('王五');
$zhaoliu = new Person('趙六');
//實例化對象存儲
$container = new SplObjectStorage();
//往存儲空間寫入對象
$container->attach($zhangsan);
$container->attach($lisi);
$container->attach($wangwu);
$container->attach($zhaoliu);
//統計存儲空間裏面的對象的數量
echo "存儲對象數量" . $container->count();
echo "<br/>";
//判斷指定的對象是否在存儲空間中
echo "是否包含指定對象:";
var_dump($container->contains($lisi));
echo "<br/>";
//從存儲中刪除指定對象
echo "刪除指定對象";
$container->detach($wangwu);
//查看當前指針所在的索引位置
echo "指針索引" . $container->key();
echo "<br/>";
//重置存儲空間指針
$container->rewind();
//校驗當前指針是否有效
var_dump($container->valid());
//遍歷存儲空間
echo "<pre>";
while ($container->valid()) {
//獲取當前指針位置的對象
var_dump($container->current());
//存儲空間指針下移
$container->next();
}
SPL之SplObjectStorage對象存儲