RecursiveCallbackFilterIterator::hasChildren

(PHP 5 >= 5.4.0)

RecursiveCallbackFilterIterator::hasChildren — Check whether the inner iterator's current element has children

说明

public void RecursiveCallbackFilterIterator::hasChildren ( void )

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

Example #1 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