strspn

名称:strspn

分类:字符串

所属语言:php

一句话介绍:返回在字符串中包含的特定字符的数目。

实例

例子 1

返回在字符串 "Hello world!" 中包含字符 "kHlleo" 的数目：

<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token keyword">echo</span> <span class="token function">strspn</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"Hello world!"</span><span class="token punctuation">,</span><span class="token string double-quoted-string">"kHlleo"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

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例子 2

返回在字符串 "abcdefand" 中包含字符 "abc" 的数目：

<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token keyword">echo</span> <span class="token function">strspn</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"abcdefand"</span><span class="token punctuation">,</span><span class="token string double-quoted-string">"abc"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

亲自试一试