RecursiveArrayIterator
PHP Manual

RecursiveArrayIterator::hasChildren

(PHP 5 >= 5.1.0, PHP 7)

RecursiveArrayIterator::hasChildrenReturns whether current entry is an array or an object

说明

public bool RecursiveArrayIterator::hasChildren ( void )

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
PHP Manual