chr

名称:chr

分类:字符串

所属语言:php

一句话介绍:从指定的 ASCII 值返回字符。

实例

例子 1

从不同的 ASCII 值返回字符：

<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token keyword">echo</span> <span class="token function">chr</span><span class="token punctuation">(</span><span class="token number">61</span><span class="token punctuation">)</span> <span class="token operator">.</span> <span class="token string double-quoted-string">"<br>"</span><span class="token punctuation">;</span> <span class="token comment">// 十进制</span>
<span class="token keyword">echo</span> <span class="token function">chr</span><span class="token punctuation">(</span><span class="token number">061</span><span class="token punctuation">)</span> <span class="token operator">.</span> <span class="token string double-quoted-string">"<br>"</span><span class="token punctuation">;</span> <span class="token comment">// 八进制值</span>
<span class="token keyword">echo</span> <span class="token function">chr</span><span class="token punctuation">(</span><span class="token number">0x61</span><span class="token punctuation">)</span> <span class="token operator">.</span> <span class="token string double-quoted-string">"<br>"</span><span class="token punctuation">;</span> <span class="token comment">// 十六进制值</span>
<span class="token delimiter important">?></span></span>

亲自试一试

例子 2

使用八进制值 046 来添加 ASCII 字符：&。

<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$str</span> <span class="token operator">=</span> <span class="token function">chr</span><span class="token punctuation">(</span><span class="token number">046</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">echo</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"You <span class="token interpolation"><span class="token variable">$str</span></span> me forever!"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

亲自试一试

例子 3

使用十进制值 43 和 61 来添加 ASCII 字符：+ 和 =。

<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$str</span> <span class="token operator">=</span> <span class="token function">chr</span><span class="token punctuation">(</span><span class="token number">43</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token variable">$str2</span> <span class="token operator">=</span> <span class="token function">chr</span><span class="token punctuation">(</span><span class="token number">61</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">echo</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"2 <span class="token interpolation"><span class="token variable">$str</span></span> 2 <span class="token interpolation"><span class="token variable">$str2</span></span> 4"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

亲自试一试