Single quote and double quotes difference ?

[Dareros]

Is there a difference between a single quote regex and and double quote regex ?

 

for example :

<?php
$res1 = preg_match('/shi*t/', $comment);
$res2 = preg_match("/shi*t/", $comment);
?>

Thank you

[.josh]

In that example, there is no difference.

 

http://php.net/manual/en/language.types.string.php for reference on the difference between single vs. double quotes.

[Jacques1]

There are no “single-quoted regexes” or “double-quoted regexes”.

 

What you have there are two different string expressions which are parsed according to the usual rules. In your case, the result is the same. The content of the string is then used as a regex. If the conents were different, then of course you'd have two different regexes. But since the content is the same, it's the same regex, regardless of whether it comes from a single-quoted string or a double-quoted string.