strrev

例

文字列「私は上海が大好き！」を反転させます：

 <span class="token php language-php"><span class="token delimiter important"><？php</span>
<span class="token keyword">Echo</span> <span class="token function">Strrev</span> <span class="token punctuation">（</span> <span class="token string double-quoted-string">「私はShanghaiが大好き！」</span> <span class="token punctuation">）</span> <span class="token punctuation">;</span>
<span class="token delimiter important">？></span></span>

自分で試してみてください