in_array

名前:in_array

カテゴリ:配列

対応言語:php

一言説明:指定された値が配列に存在するかどうかを確認します。

例

例1

配列の値「グレン」を検索し、テキストを出力します。

 <span class="token php language-php"><span class="token delimiter important"><？php</span>
<span class="token variable">$ People</span> <span class="token operator">=</span> <span class="token keyword">array</span> <span class="token punctuation">（</span> <span class="token string double-quoted-string">"Bill"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"Steve"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"Mark"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"David"</span> <span class="token punctuation">）</span> <span class="token punctuation">;</span>

<span class="token keyword">もし</span><span class="token punctuation">（</span><span class="token function"></span></span><mark> <span class="token function">in_array</span> <span class="token punctuation">（</span> <span class="token string double-quoted-string">"mark"</span> <span class="token punctuation">、</span> <span class="token variable">$ people</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 keyword">エコー</span><span class="token string double-quoted-string">「マッチが見つかった」</span> <span class="token punctuation">。</span>
  <span class="token punctuation">}</span>
<span class="token keyword">それ以外</span>
  <span class="token punctuation">{</span>
  <span class="token keyword">エコー</span><span class="token string double-quoted-string">「一致していない」</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

すべての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">$ People</span> <span class="token operator">=</span> <span class="token keyword">array</span> <span class="token punctuation">（</span> <span class="token string double-quoted-string">"Bill"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"Steve"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"Mark"</span> <span class="token punctuation">、</span> <span class="token string double-quoted-string">"David"</span> <span class="token punctuation">）</span> <span class="token punctuation">;</span>

<span class="token keyword">もし</span><span class="token punctuation">（</span><span class="token function"></span></span><mark> <span class="token function">in_array</span> <span class="token punctuation">（</span> <span class="token string double-quoted-string">"23"</span> <span class="token punctuation">、</span> <span class="token variable">$ people</span> <span class="token punctuation">、</span> <span class="token constant boolean">true</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 keyword">Echo</span> <span class="token string double-quoted-string">"Match fund <br>"</span> <span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
<span class="token keyword">それ以外</span>
  <span class="token punctuation">{</span>
  <span class="token keyword">エコー</span><span class="token string double-quoted-string">"マッチが見つかりません<br>"</span> <span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
<span class="token keyword">if</span> <span class="token punctuation">（</span> <span class="token function">in_array</span> <span class="token punctuation">（</span> <span class="token string double-quoted-string">"mark"</span> <span class="token punctuation">、</span> <span class="token variable">$ people</span> <span class="token punctuation">、</span> <span class="token constant boolean">true</span> <span class="token punctuation">）</span> <span class="token punctuation">）</span>
  <span class="token punctuation">{</span>
  <span class="token keyword">Echo</span> <span class="token string double-quoted-string">"Match fund <br>"</span> <span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
<span class="token keyword">それ以外</span>
  <span class="token punctuation">{</span>
  <span class="token keyword">エコー</span><span class="token string double-quoted-string">"マッチが見つかりません<br>"</span> <span class="token punctuation">;</span>
  <span class="token punctuation">}</span>

<span class="token keyword">if</span> <span class="token punctuation">（</span> <span class="token function">in_array</span> <span class="token punctuation">（</span> <span class="token number">23</span> <span class="token punctuation">、</span> <span class="token variable">$ people</span> <span class="token punctuation">、</span> <span class="token constant boolean">true</span> <span class="token punctuation">）</span> <span class="token punctuation">）</span>
  <span class="token punctuation">{</span>
  <span class="token keyword">Echo</span> <span class="token string double-quoted-string">"Match fund <br>"</span> <span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
<span class="token keyword">それ以外</span>
  <span class="token punctuation">{</span>
  <span class="token keyword">エコー</span><span class="token string double-quoted-string">"マッチが見つかりません<br>"</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