RecursiveCallbackFilterIterator::hasChildren()
(PHP 5 >= 5.4.0, PHP 7)
Check whether the inner iterator's current element has children
说明
public RecursiveCallbackFilterIterator::hasChildren( void) : bool
Returns TRUE
if the current element has children,FALSE
otherwise.
参数
此函数没有参数。
返回值
Returns TRUE
if the current element has children,FALSE
otherwise.
范例
RecursiveCallbackFilterIterator::hasChildren() basic usage
<?php $dir = new RecursiveDirectoryIterator(__DIR__); // Recursively iterate over XML files $files = new RecursiveCallbackFilterIterator($dir, function ($current, $key, $iterator) { // Allow recursion into directories if ($iterator->hasChildren()) { return TRUE; } // Check for XML file if (!strcasecmp($current->getExtension(), 'xml')) { return TRUE; } return FALSE; }); ?>
参见
- RecursiveCallbackFilterIterator Examples
- RecursiveCallbackFilterIterator::__construct() Create a RecursiveCallbackFilterIterator from a RecursiveIterator
- RecursiveCallbackFilteriterator::getChildren() Return the inner iterator's children contained in a RecursiveCallbackFilterIterator