ArrayIterator::valid

    (PHP 5, PHP 7, PHP 8)

    ArrayIterator::valid — Check whether array contains more entries

    说明

    public ArrayIterator::valid(): bool

    Checks if the array contains any more entries.

    参数

    此函数没有参数。

    返回值

    Returns true if the iterator is valid, otherwise false

    示例

    示例 #1 ArrayIterator::valid() example

    <?php
    $array     = array('1' => 'one');

    $arrayobject = new ArrayObject($array);
    $iterator = $arrayobject->getIterator();

    var_dump($iterator->valid()); //bool(true)

    $iterator->next(); // advance to the next item

    //bool(false) because there is only one array element
    var_dump($iterator->valid());
    ?>

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