strripos
計算指定字符串在目標字符串中最後一次出現的位置(不區分大小寫)
查找"php" 在字符串中最後一次出現的位置:
<span class="token php language-php"><span class="token delimiter important"><?php</span> <span class="token keyword">echo</span> <span class="token function">strripos</span> <span class="token punctuation">(</span> <span class="token string double-quoted-string">"You love php, I love php too!"</span> <span class="token punctuation">,</span> <span class="token string double-quoted-string">"PHP"</span> <span class="token punctuation">)</span> <span class="token punctuation">;</span> <span class="token delimiter important">?></span></span>