Customise time in preg_replace - php

Question

I have a form where users can quote others using bbcode. When somebody push quote button, the textarea value is :
[quote user=User date=1348246887 post=301]
User post text
[/quote]
And now, my code to transform into a block is :
$post = preg_replace("/\[quote user=(.*) date=(.*) post=(.*)](.*)\[\/quote\]/Uis", "<div class=\"quote\"><p>Quote by \\1 at time : \\2 </p><span>\\4</span></div>", $post);
How can i convert the time to date into preg_replace ? In preg_replace i can't do it, because the value of \2 is not set.

Answer 1

Try something like this (I added "test" inside the link, so you could see the link--not sure what you wanted there, but a non-breaking space won't make the link visible.) I used htmlentities for security in case the "subiect" $_GET variable (which maybe you meant to be "subject"?) contained markup or quotes. And of course, you can customize the date() string first argument to your needs. Finally, I added \s+ to allow for more flexible whitespacing. I also changed delimiter '/' to '#' so you don't need to escape '/' within the regex.
Updated for older PHP compatibility:
<?php
$post = <<<HERE
[quote user=User date=1348246887 post=301]
User post text
[/quote]
HERE;
// ] (just adding this comment to fix SO syntax colorer)
function replacer ($matches) {
return '<div class="quote"><p>Quote by '.$matches[1].' at time : '.
date('Y m d', $matches[2]).'<a href="index.php?subject='.
htmlentities($_GET['subiect'], ENT_COMPAT, 'UTF-8').
'&post='.$matches[3].'">test </a></p><span>'.
$matches[4].'</span></div>';
}
$post = preg_replace_callback(
'#\[quote\s+user=(.*)\s+date=(.*)\s+post=(.*)](.*)\[/quote\]#Uis',
'replacer',
$post
);
var_dump($post);
?>