作成日:2018-02-27, 更新日:2018-05-14
基本
$ary = array_merge ( 一つ目の配列, 二つ目の配列, 三つ目の配列・・・ )
数字の添え字のときは添え字が再振りされるので注意が必要。
各サンプルは・・・「配列と配列の合体サンプル(PHP・array_merge())」参照
添え字が重複する場合の上書き
基本、後のデータを上書き
対象になる元の配列
$ary0
array ( 'key1' => 'ary0-key1', 'key2' => 'ary0-key2', )
$ary1
array ( 'key1' => 'ary1-key1', 'key3' => 'ary1-key3', )
$ary2
array ( 'key1' => array ( 'chld1' => 'ary2-key1-chld1', 'chld2' => 'ary2-key1-chld2', ), 'key4' => array ( 'chld1' => 'ary2-key5-chld1', 'chld2' => 'ary2-key5-chld2', ), )
$ary3
array ( 'key4' => array ( 'chld1' => 'ary3-key1-chld1', 'chld3' => 'ary3-key1-chld3', ), 'key5' => array ( 'chld1' => 'ary3-key7-chld1', 'chld2' => 'ary3-key7-chld2', ), )
array_merge()の結果
array_merge($ary0, $ary1)
array ( 'key1' => 'ary1-key1', 'key2' => 'ary0-key2', 'key3' => 'ary1-key3', )
array_merge($ary1, $ary0)
array ( 'key1' => 'ary0-key1', 'key3' => 'ary1-key3', 'key2' => 'ary0-key2', )
array_merge($ary0, $ary2)
array ( 'key1' => array ( 'chld1' => 'ary2-key1-chld1', 'chld2' => 'ary2-key1-chld2', ), 'key2' => 'ary0-key2', 'key4' => array ( 'chld1' => 'ary2-key5-chld1', 'chld2' => 'ary2-key5-chld2', ), )
array_merge($ary2, $ary3)
array ( 'key1' => array ( 'chld1' => 'ary2-key1-chld1', 'chld2' => 'ary2-key1-chld2', ), 'key4' => array ( 'chld1' => 'ary3-key1-chld1', 'chld3' => 'ary3-key1-chld3', ), 'key5' => array ( 'chld1' => 'ary3-key7-chld1', 'chld2' => 'ary3-key7-chld2', ), )
array_merge($ary3, $ary2)
array ( 'key4' => array ( 'chld1' => 'ary2-key5-chld1', 'chld2' => 'ary2-key5-chld2', ), 'key5' => array ( 'chld1' => 'ary3-key7-chld1', 'chld2' => 'ary3-key7-chld2', ), 'key1' => array ( 'chld1' => 'ary2-key1-chld1', 'chld2' => 'ary2-key1-chld2', ), )