in_array

名稱:in_array

分類:數組

所屬語言:php

一句話介紹:檢查數組中是否存在指定的值。

實例

例子1

在數組中搜索值"Glenn" ，並輸出一些文本：

 <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">if</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">echo</span> <span class="token string double-quoted-string">"匹配已找到"</span> <span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
<span class="token keyword">else</span>
  <span class="token punctuation">{</span>
  <span class="token keyword">echo</span> <span class="token string double-quoted-string">"匹配未找到"</span> <span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
<span class="token delimiter important">?></span>

親自試一試

例子2

使用所有參數：

 <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">if</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">$people</span> <span class="token punctuation">,</span> <span class="token constant boolean">TRUE</span> <span class="token punctuation">)</span></mark><span class="token punctuation"></span> <span class="token punctuation">)</span>
  <span class="token punctuation">{</span>
  <span class="token keyword">echo</span> <span class="token string double-quoted-string">"匹配已找到<br>"</span> <span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
<span class="token keyword">else</span>
  <span class="token punctuation">{</span>
  <span class="token keyword">echo</span> <span class="token string double-quoted-string">"匹配未找到<br>"</span> <span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span> <span class="token function">in_array</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"Mark"</span> <span class="token punctuation">,</span> <span class="token variable">$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">"匹配已找到<br>"</span> <span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
<span class="token keyword">else</span>
  <span class="token punctuation">{</span>
  <span class="token keyword">echo</span> <span class="token string double-quoted-string">"匹配未找到<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">"匹配已找到<br>"</span> <span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
<span class="token keyword">else</span>
  <span class="token punctuation">{</span>
  <span class="token keyword">echo</span> <span class="token string double-quoted-string">"匹配未找到<br>"</span> <span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
<span class="token delimiter important">?></span>

親自試一試