怎麼用PHP 的strpos 函數查找子字符串的位置？詳細說明來了

<span><span><span class="hljs-meta"><?php</span></span><span>
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</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"歡迎來到 PHP 教程專欄！"</span></span><span>;
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</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"<h1>怎麼用 PHP 的 strpos 函數查找子字符串的位置？詳細說明來了</h1>"</span></span><span>;

</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"<p>在 PHP 中，<code>strpos()

\$text = 'Hello, world!';
\$pos = strpos(\$text, 'world');

if (\$pos !== false) {
    echo '子字符串在位置: ' . \$pos;
} else {
    echo '未找到子字符串';
}