ord

名称:ord

分类:字符串

所属语言:php

一句话介绍:返回字符串中第一个字符的 ASCII 值。

实例

返回 "S" 的 ASCII值：

<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token keyword">echo</span> <span class="token function">ord</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"S"</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 keyword">echo</span> <span class="token function">ord</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"Shanghai"</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 delimiter important">?></span></span>

亲自试一试

实例

ord() 与 strtr() 配合实现字符映射

substr

md5_file

get_html_translation_table

substr_compare

str_split

htmlspecialchars_decode

str_contains

strripos