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    ParentIterator クラス

    (PHP 5 >= 5.1.0, PHP 7, PHP 8)

    はじめに

    これは FilterIterator を継承したクラスで、 RecursiveIteratorIterator を使った再帰的な反復処理をできるようにします。 ただし、子を持つ要素しか表示しません。

    目次

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    User Contributed Notes 2 notes

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    4
    Anonymous
    12 years ago
    ParentIterator is just a RecursiveFilterIterator whos accept() method calls the RecursiveFilterIterator->hasChildren() method to filter itself.

    Basically, it filters out leaf nodes. For example

    This would yield all files and directories
    <?php
    $rdi     = new RecursiveDirectoryIterator(__DIR__);
    $iter = new RecursiveIteratorIterator($rdi, RecursiveIteratorIterator::CHILD_FIRST);
    ?>

    wrapping that in a ParentIterator would filter it down to just directories
    <?php
    $rdi     = new RecursiveDirectoryIterator(__DIR__);
    $iter = new RecursiveIteratorIterator($rdi, RecursiveIteratorIterator::CHILD_FIRST);
    $dirsOnly = new ParentIterator($iter);
    ?>
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    1
    dn dot permyakov at gmail dot com
    5 years ago
    Easy example for understanding:
    <?php

    $iterator     = new ParentIterator(
        new     RecursiveArrayIterator(
            array(array(    1, 2, 3), 'A', 'B', 'C')
        )
    );

    foreach (    $iterator as $recursive) {
        foreach (    $recursive as $value) {
            echo     $value . PHP_EOL;
        }
    }
    ?>

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