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    RecursiveIteratorIterator::__construct

    (PHP 5 >= 5.1.3, PHP 7, PHP 8)

    RecursiveIteratorIterator::__construct — RecursiveIteratorIterator を作成する

    説明

    public RecursiveIteratorIterator::__construct(Traversable $iterator, int $mode = RecursiveIteratorIterator::LEAVES_ONLY, int $flags = 0)

    RecursiveIterator から RecursiveIteratorIterator を作成します。

    パラメータ

    iterator

    作成する元となるイテレータ。 RecursiveIterator あるいは IteratorAggregate。

    mode

    オプションのモード。これらの値が指定できます。

    flags

    オプションのフラグ。指定できる値は RecursiveIteratorIterator::CATCH_GET_CHILD で、RecursiveIteratorIterator::getChildren() のコール時にスローされた例外を無視します。

    例

    例1 RecursiveIteratorIterator の反復処理

    <?php
    $array     = array(
    array(
    array(
    array(
    'leaf-0-0-0-0',
    'leaf-0-0-0-1'
    ),
    'leaf-0-0-0'
    ),
    array(
    array(
    'leaf-0-1-0-0',
    'leaf-0-1-0-1'
    ),
    'leaf-0-1-0'
    ),
    'leaf-0-0'
    )
    );

    $iterator = new RecursiveIteratorIterator(
    new     RecursiveArrayIterator($array),
    $mode
    );
    foreach (    $iterator as $key => $leaf) {
    echo     "$key => $leaf", PHP_EOL;
    }
    ?>

    $mode = RecursiveIteratorIterator::LEAVES_ONLY の場合の出力 

    0 => leaf-0-0-0-0
1 => leaf-0-0-0-1
0 => leaf-0-0-0
0 => leaf-0-1-0-0
1 => leaf-0-1-0-1
0 => leaf-0-1-0
0 => leaf-0-0

    $mode = RecursiveIteratorIterator::SELF_FIRST の場合の出力 

    0 => Array
0 => Array
0 => Array
0 => leaf-0-0-0-0
1 => leaf-0-0-0-1
1 => leaf-0-0-0
1 => Array
0 => Array
0 => leaf-0-1-0-0
1 => leaf-0-1-0-1
1 => leaf-0-1-0
2 => leaf-0-0

    $mode = RecursiveIteratorIterator::CHILD_FIRST の場合の出力 

    0 => leaf-0-0-0-0
1 => leaf-0-0-0-1
0 => Array
1 => leaf-0-0-0
0 => Array
0 => leaf-0-1-0-0
1 => leaf-0-1-0-1
0 => Array
1 => leaf-0-1-0
1 => Array
2 => leaf-0-0
0 => Array

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    User Contributed Notes 2 notes

    up
    2
    Tom
    13 years ago
    Note: the missing documentation of the argument list for this constructor is currently as follows (according to source code).

    Param iter: see RecursiveIterator

    Param mode:
    - LEAVES_ONLY = (default) only iterate leaves
    - SELF_FIRST = iterate parents prior to children
    - CHILD_FIRST = iterate children prior to parents

    Param flags:
    - CATCH_GET_CHILD = ignore exceptions in getChildren() call
    up
    2
    Matt Creenan
    14 years ago
    Note that LEAVES_ONLY, SELF_FIRST and CHILD_FIRST do not work by themselves.

    They are class constants so you need to use RecursiveIteratorIterator::LEAVES_ONLY, etc.
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