Question

I have this code

<?php
$a = "\\u0000";
$b =  preg_quote($a);
echo "<br />my own: ".$a;
echo "<br />with preg_quote:". $b;
?>

result is here

How is possible that one \ character vanished from my $a variable?

I think it’s very begginer behavior/question but I’m really lost about these escape characters.

Disclaimer: I’m not begginer in PHP

Answer 1

because \ escapes the next one, as every \ needs to be escaped.

with a single \ it escapes the next character witch is u, but \u isn’t a char code so it is displayed like a simple character