What does mean in php?

 in php is an html tag, which means output as it is without changes; using <pre class="brush:php;toolbar:false"> in php code is mainly used to output error codes, or to print array output to maintain the Uniformity of format. </p></blockquote>
<p><strong><img  src="/static/imghw/default1.png" data-src="https://img.php.cn/upload/article/202112/21/2021122109384595128.jpg" class="lazy" alt="What does  mean in php?" ></strong></p>
<p> The operating environment of this article: Windows 7 system, PHP version 7.1, Dell G3 computer. </p>
<p><strong>What does <pre class="brush:php;toolbar:false"> mean in php? </strong></p>
<p>The role of pre in php: </p>
<p><pre class="brush:php;toolbar:false">

is an html tag, which means that it is output as is without any changes.

Pre is mainly used in PHP code to output error codes, or to print array output to maintain the uniformity of the format.

For example:

<?php

$cars=array(
    array("aaa",1,20),
    array("bbb",2,30),
    array("ccc",3,40),
);
print_r($cars);
?>

The effect is like this:

The format is very messy.

However, use pre to process it:

<?php

$cars=array(
    array("aaa",1,20),
    array("bbb",2,30),
    array("ccc",3,40),
);
print_r($cars);
?>

That’s it:

It’s much more comfortable.

You can also not write pre outside the php tag, and only output it at the end:

<?php
 
$cars=array(
    array("aaa",1,20),
    array("bbb",2,30),
    array("ccc",3,40),
);
print("<pre class="brush:php;toolbar:false">");
print_r($cars);
print("<pre class="brush:php;toolbar:false">");
?>

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