有什么区别“ <br /> \\ n“;和” <br /> “;

Question

I am new to php,there is a statement confused me.

<?php
$dom=new Document();
$dom->loadHTMLFile('http://php.net');
$xml = simplexml_import_dom($dom);
$nodes = $xml->xpath('//a[@href]');
foreach ($nodes as $node) {
    echo $node['href'], "<br />\n";
}
?>

If we change echo $node['href'], "<br />\\n"; into echo $node['href']."<br />"; ,it has the same effect,same output in my web page,i want to know What is the difference between echo "some string",<br />\\n"; and echo
"some string".<br />"; echo
"some string".<br />"; echo
"some string".<br />"; ?

Answer 1

<br /> is a HTML line-break, whereas \\n is a newline character in the source code.

In other words, <br /> will make a new line when you view the page as rendered HTML, whereas \\n will make a new line when you view the source code.

Alternatively, if you're outputting to a console rather than somewhere that will be rendered by a web browser then \\n will create a newline in the console output.