RecursiveCallbackFilterIterator::hasChildren()

(PHP 5 >= 5.4.0, PHP 7)

Check whether the inner iterator's current element has children

说明

publicRecursiveCallbackFilterIterator::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