(PHP 5 >= 5.1.0, PHP 7, PHP 8)
RecursiveArrayIterator::hasChildren — Returns whether current entry is an array or an object
Returns whether current entry is an array or an object for which an iterator can be obtained via RecursiveArrayIterator::getChildren().
此函数没有参数。
Returns true if the current entry is an array or an object,
otherwise false is returned.
示例 #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