关于php:SPL-数据结构4SplObjectStorage

Splobjectstorage 是spl规范库中的数据对象容器，用来存储一组对象。特地是当须要惟一标识对象的时候。

class Person{    public $name;    public function __construct(string $name)    {        $this->name = $name;    }}//实例化对象$zhangsan = new Person('张三');$lisi     = new Person('李四');$wangwu   = new Person('王五');$zhaoliu  = new Person('赵六');//实例化对象存储$container = new SplObjectStorage();//往存储空间写入对象$container->attach($zhangsan);$container->attach($lisi);$container->attach($wangwu);$container->attach($zhaoliu);//统计存储空间外面的对象的数量echo "存储对象数量" . $container->count() . PHP_EOL;//判断指定的对象是否在存储空间中echo "是否蕴含指定对象:";var_dump($container->contains($lisi)) . PHP_EOL;$lisi2 = new Person("李四");echo "指定新对象:";var_dump($container->contains($lisi2)) . PHP_EOL;echo "删除指定对象";$container->detach($wangwu);echo PHP_EOL;//查看以后指针所在的索引地位echo "指针索引" . $container->key() . PHP_EOL;while ($container->valid()) {    //获取以后指针地位的对象    $object = $container->current();    var_dump($object);    echo "对象名称：" . $object->name . PHP_EOL;    //存储空间指针下移    $container->next();}

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