array_slice

名前:array_slice

カテゴリ:配列

対応言語:php

一言説明:アレイの選択した部分を返します。

例

例1

配列の3番目の要素から始まり、配列内の残りの要素を返します。

 <span class="token php language-php"><span class="token delimiter important"><？php</span>
<span class="token variable">$ a</span> <span class="token operator">=</span> <span class="token keyword">array</span> <span class="token punctuation">（</span> <span class="token string double-quoted-string">"red"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"green"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"blue"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"Yellow"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"Brown"</span> <span class="token punctuation">）</span> <span class="token punctuation">;</span>
<span class="token function">print_r</span> <span class="token punctuation">（</span><span class="token function"></span></span><mark> <span class="token function">array_slice</span> <span class="token punctuation">（</span> <span class="token variable">$ a</span> <span class="token punctuation">、</span> <span class="token number">2</span> <span class="token punctuation">）</span></mark><span class="token punctuation"></span> <span class="token punctuation">）</span> <span class="token punctuation">;</span>
<span class="token delimiter important">？></span>

自分で試してみてください

例2

配列の2番目の要素からそれを取り、2つの要素のみを返します。

 <span class="token php language-php"><span class="token delimiter important"><？php</span>
<span class="token variable">$ a</span> <span class="token operator">=</span> <span class="token keyword">array</span> <span class="token punctuation">（</span> <span class="token string double-quoted-string">"red"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"green"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"blue"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"Yellow"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"Brown"</span> <span class="token punctuation">）</span> <span class="token punctuation">;</span>
<span class="token function">print_r</span> <span class="token punctuation">（</span><span class="token function"></span></span><mark> <span class="token function">array_slice</span> <span class="token punctuation">（</span> <span class="token variable">$</span> <span class="token punctuation">a</span> <span class="token punctuation">、</span> <span class="token number">1、2</span> <span class="token number">）</span><span class="token punctuation"></span></mark><span class="token punctuation"></span> <span class="token punctuation">）</span> <span class="token punctuation">;</span>
<span class="token delimiter important">？></span>

自分で試してみてください

例3

ネガティブスタートパラメーターを使用します：

 <span class="token php language-php"><span class="token delimiter important"><？php</span>
<span class="token variable">$ a</span> <span class="token operator">=</span> <span class="token keyword">array</span> <span class="token punctuation">（</span> <span class="token string double-quoted-string">"red"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"green"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"blue"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"Yellow"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"Brown"</span> <span class="token punctuation">）</span> <span class="token punctuation">;</span>
<span class="token function">print_r</span> <span class="token punctuation">（</span><span class="token function"></span></span><mark> <span class="token function">array_slice</span> <span class="token punctuation">（</span> <span class="token variable">$</span> <span class="token punctuation">a</span> <span class="token punctuation">、</span> <span class="token operator">-2、1</span> <span class="token number">）</span><span class="token number"></span><span class="token punctuation"></span></mark><span class="token punctuation"></span> <span class="token punctuation">）</span> <span class="token punctuation">;</span>
<span class="token delimiter important">？></span>

自分で試してみてください

例4

Preserveパラメーターをtrueに設定します。

 <span class="token php language-php"><span class="token delimiter important"><？php</span>
<span class="token variable">$ a</span> <span class="token operator">=</span> <span class="token keyword">array</span> <span class="token punctuation">（</span> <span class="token string double-quoted-string">"red"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"green"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"blue"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"Yellow"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"Brown"</span> <span class="token punctuation">）</span> <span class="token punctuation">;</span>
<span class="token function">print_r</span> <span class="token punctuation">（</span><span class="token function"></span></span><mark> <span class="token function">array_slice</span> <span class="token punctuation">（</span> <span class="token variable">$</span> <span class="token constant boolean">a</span> <span class="token punctuation">、</span> <span class="token number">1、2</span> <span class="token punctuation">、</span> <span class="token number">true</span> <span class="token punctuation">）</span><span class="token punctuation"></span></mark><span class="token punctuation"></span> <span class="token punctuation">）</span> <span class="token punctuation">;</span>
<span class="token delimiter important">？></span>

自分で試してみてください

例5

文字列キー名と整数キー名を処理します。

 <span class="token php language-php"><span class="token delimiter important"><？php</span>
<span class="token variable">$ a</span> <span class="token operator">=</span> <span class="token keyword">array</span> <span class="token punctuation">（</span> <span class="token string double-quoted-string">"a"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"red"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"b"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"green"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"c"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"blue"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"d"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"yellow"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"e"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"brown"</span> <span class="token punctuation">）</span> <span class="token punctuation">;</span>
<span class="token function">print_r</span> <span class="token punctuation">（</span> <span class="token function">array_slice</span> <span class="token punctuation">（</span> <span class="token variable">$</span> <span class="token punctuation">a</span> <span class="token punctuation">、</span> <span class="token number">1、2</span> <span class="token punctuation">）</span> <span class="token punctuation">）</span> <span class="token number">;</span><span class="token punctuation"></span>

<span class="token variable">$ a</span> <span class="token operator">=</span> <span class="token keyword">array</span> <span class="token punctuation">（</span> <span class="token string double-quoted-string">"0"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"red"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"1"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"green"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"2"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"blue"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"3"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"Yellow"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"4"</span> <span class="token operator">=></span> <span class="token string double-quoted-string">"Brown"</span> <span class="token punctuation">）</span> <span class="token punctuation">;</span>
<span class="token function">print_r</span> <span class="token punctuation">（</span><span class="token function"></span></span><mark> <span class="token function">array_slice</span> <span class="token punctuation">（</span> <span class="token variable">$</span> <span class="token punctuation">a</span> <span class="token punctuation">、</span> <span class="token number">1、2</span> <span class="token number">）</span><span class="token punctuation"></span></mark><span class="token punctuation"></span> <span class="token punctuation">）</span> <span class="token punctuation">;</span>
<span class="token delimiter important">？></span>

自分で試してみてください