PHP Manual
RecursiveArrayIterator
Returns whether current entry is an array or an object

RecursiveArrayIterator::hasChildren

(PHP 5 >= 5.1.0, PHP 7)

RecursiveArrayIterator::hasChildren — Returns whether current entry is an array or an object

说明

public RecursiveArrayIterator::hasChildren ( void ) : bool

Returns whether current entry is an array or an object for which an iterator can be obtained via RecursiveArrayIterator::getChildren().

参数

此函数没有参数。

返回值

Returns TRUE if the current entry is an array or an object, otherwise FALSE is returned.

范例

Example #1 RecursiveArrayIterator::hasChildren() example

 <?php
$fruits = array("a" => "lemon", "b" => "orange", array("a" => "apple", "p" => "pear"));

$iterator = new RecursiveArrayIterator($fruits);

while ($iterator->valid()) {

    // Check if there are children
    if ($iterator->hasChildren()) {
        // print all children
        foreach ($iterator->getChildren() as $key => $value) {
            echo $key . ' : ' . $value . "\n";
        }
    } else {
        echo "No children.\n";
    }

    $iterator->next();
}
?>

以上例程会输出：

No children.
No children.
a : apple
p : pear

参见

RecursiveArrayIterator::getChildren() - Returns an iterator for the current entry if it is an array or an object

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