preg_last_error function common error codes and their meanings

<span><span><span class="hljs-meta">&lt;?php</span></span><span>
</span><span><span class="hljs-comment">// This part of the code is unrelated to the article content, it can be any PHP code example</span></span><span>
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"This is an unrelated code example, used to separate the main text."</span></span><span>;
</span><span><span class="hljs-meta">?&gt;</span></span><span>
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<p>What are the common error codes in the preg_last_error function? What do these error codes specifically mean?</p>
<p>In PHP, <code></span><span><span class="hljs-title function_ invoke__">preg_last_error</span></span><span>()