Common Errors of mb_regex_set_options Function and How to Fix Them

<span class="hljs-meta"><?php<br>
// This part is unrelated to the article content<br>
echo "Welcome to this technical article.<br>"<br>
echo "This article will introduce some common errors of the mb_regex_set_options function and their solutions.<br>"<br>
?></p>
<p><hr></p>
<p><?php<br>
// Article content starts<br>
echo "<h1>Summary of Common Errors in mb_regex_set_options Function and How to Fix Them</h1>"</p>
<p>echo <span><span class="hljs-string">"<p>In PHP, <code>mb_regex_set_options