ucfirst

实例

把 "hello" 的首字符转换为大写：

<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token keyword">echo</span> <span class="token function">ucfirst</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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