strspn

名稱:strspn

分類:字符串

所屬語言:php

一句話介紹:返回在字符串中包含的特定字符的數目。

實例

例子1

返回在字符串"Hello world!" 中包含字符"kHlleo" 的數目：

 <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>

親自試一試

例子2

返回在字符串"abcdefand" 中包含字符"abc" 的數目：

 <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>

親自試一試