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array_slice() で配列の一部を取得する(PHP)

Last updated at Posted at 2022-12-17

概要

配列の一部が取得できます。
戻り値は取得した配列になります。

文法

array_slice(array, offset, length, preserve_keys)

[必須] array:入力配列
[必須] offset:開始位置の指定
[任意] length:開始位置からいくつ値を取得するか
[任意] preserve_keys:キーを保存するか

使い方

<?php

$input = ["a", "b", "c", "d", "e"];

$slicedList = array_slice($input, 2); 
print_r($slicedList); // Array ( [0] => c [1] => d [2] => e )

$slicedList = array_slice($input, 2, 2);
print_r($slicedList); // Array ( [0] => c [1] => d )

// 連想配列でも利用可能。
$input2 = [
    "input" => "test1",
    "input2" => "test2",
    "input3" => "test3",
];

$slicedList2 = array_slice($input2, 1);
print_r($slicedList2); // Array ( [input2] => test2 [input3] => test3 )

参考

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