SplObjectStorage::removeAllExcept

    (PHP 5 >= 5.3.6, PHP 7, PHP 8)

    SplObjectStorage::removeAllExcept — Removes all objects except for those contained in another storage from the current storage

    说明

    publicSplObjectStorage::removeAllExcept(SplObjectStorage$storage): int

    Removes all objects except for those contained in another storage from the current storage.

    参数

    storage

    The storage containing the elements to retain in the current storage.

    返回值

    Returns the number of remaining objects.

    示例

    示例 #1 SplObjectStorage::removeAllExcept() example

    <?php
    $a     = (object) 'a';
    $b = (object) 'b';
    $c = (object) 'c';

    $foo = new SplObjectStorage;
    $foo->attach($a);
    $foo->attach($b);

    $bar = new SplObjectStorage;
    $bar->attach($b);
    $bar->attach($c);

    $foo->removeAllExcept($bar);
    var_dump($foo->contains($a));
    var_dump($foo->contains($b));
    ?>

    以上示例的输出类似于：

    bool(false) bool(true)
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