strcmp

名称:strcmp

分类:字符串

所属语言:php

一句话介绍:比较两个字符串（对大小写敏感）。

实例

例子 1

比较两个字符串（区分大小写）：

<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token keyword">echo</span> <span class="token function">strcmp</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">"Hello world!"</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

比较两个字符串（区分大小写，Hello 和 hELLo 输出不相同）：

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

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例子 3

不同的返回值：

<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token keyword">echo</span> <span class="token function">strcmp</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">"Hello world!"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// 两字符串相等</span>
<span class="token keyword">echo</span> <span class="token function">strcmp</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">"Hello"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// <i>string1</i> 大于 <i>string2</i></span>
<span class="token keyword">echo</span> <span class="token function">strcmp</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">"Hello world! Hello!"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// <i>string1</i> 小于 <i>string2</i></span>
<span class="token delimiter important">?></span></span>

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