ArrayObject::offsetSet

    (PHP 5, PHP 7, PHP 8)

    ArrayObject::offsetSet — 指定したインデックスに新しい値をセットする

    説明

    public ArrayObject::offsetSet(mixed $key, mixed $value): void

    指定したインデックスに新しい値を設定します。

    パラメータ

    key

    設定したいインデックス。

    value

    key の新しい値。

    戻り値

    値を返しません。

    例

    例1 ArrayObject::offsetSet() の例

    <?php
    class Example {
    public     $property = 'prop:public';
    }
    $arrayobj = new ArrayObject(new Example());
    $arrayobj->offsetSet(4, 'four');
    $arrayobj->offsetSet('group', array('g1', 'g2'));
    var_dump($arrayobj);

    $arrayobj = new ArrayObject(array('zero','one'));
    $arrayobj->offsetSet(null, 'last');
    var_dump($arrayobj);
    ?>

    上の例の出力は以下となります。

    object(ArrayObject)#1 (3) {
  ["property"]=>
  string(11) "prop:public"
  [4]=>
  string(4) "four"
  ["group"]=>
  array(2) {
    [0]=>
    string(2) "g1"
    [1]=>
    string(2) "g2"
  }
}
object(ArrayObject)#3 (3) {
  [0]=>
  string(4) "zero"
  [1]=>
  string(3) "one"
  [2]=>
  string(4) "last"
}

    参考

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    User Contributed Notes 2 notes

    up
    3
    jerikojerk
    13 years ago
    On my php 5.3.5 installation, i discovered that value can be set by reference and not by copy ... depending the context..

    so this is différent from what a regular array()

    <?php

    function set(&$x, &$a )
    {
    $x[] = $a;
    }

    $x = new ArrayObject();
    $y = array();
    $z = new ArrayObject();

    $a = array( 'foo' );
    set($y,$a);
    set($x,$a);
    $z[]=$a;

    $a = array( 'bar');

    set($x,$a);
    set($y,$a);
    $z[]=$a;

    print_r($x);
    print_r($y);
    print_r($z);
    ?>

    // output
    ArrayObject Object
    (
    [storage:ArrayObject:private] => Array
    (
    [0] => Array
    (
    [0] => bar
    )

    [1] => Array
    (
    [0] => bar
    )

    )

    )
    Array
    (
    [0] => Array
    (
    [0] => foo
    )

    [1] => Array
    (
    [0] => bar
    )

    )
    ArrayObject Object
    (
    [storage:ArrayObject:private] => Array
    (
    [0] => Array
    (
    [0] => bar
    )

    [1] => Array
    (
    [0] => bar
    )

    )

    )
    up
    2
    n dot lenepveu at gmail dot com
    16 years ago
    If $index is null, $newval is naturally pushed onto the end of the array as ArrayObject::append
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