How to wrap line in php

When writing PHP script code, we often see the two characters \n and
. They both have the function of breaking lines, so what exactly do they mean? What's the difference?

1.\n is to make the source code wrap, but the content displayed by the browser is not;

2.
is to make the content displayed by the browser wrap, but the source The code does not wrap.

For example, PHP code 1:

<?php
 
echo 0;
 
echo "\n";
 
echo 1;
 
?>

For example

<?php
echo 0;
echo "<br />";
echo 1;
 
?>

Okay, this is the difference between \n and
, I hope it will be helpful to you Everyone is helpful.

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