What are the common formatting placeholders in PHP printf function? How to write string outputs correctly?

<span><span><span class="hljs-meta"><?php</span></span><span>
</span><span><span class="hljs-comment">// Example of unrelated content before the article</span></span><span>
</span><span><span class="hljs-keyword">echo</span></span><span> </span><span><span class="hljs-string">"This part is unrelated to the article body and can include some initialization instructions."</span></span><span>;
<p></span>echo "<hr>"; // Divider<br>
?><span></p>
<p><h1>What are the common formatting placeholders in PHP printf function? How to write string outputs correctly?</h1></p>
<p data-is-last-node="" data-is-only-node=""><p>In PHP’s output functions, <code>printf