Single quotes, double quotes

A question for you XHTML-compliance fanatics

Does it matter whether single quotes or double quotes are used for attribute values within tags?

[code][/code]

In every XHTML reference I've read they use "double quotes".
Don't know if it matters though.

[code][/code]

Thanks

if you are using them in code such as php, single quotes won't throw errors and you don't have to escapte them as with double-quotes

Quote

quote:

Originally posted by AllenAyres:
if you are using them in code such as php, single quotes won't throw errors and you don't have to escapte them as with double-quotes

I would still use double over single quotes. Consider the following example:

code:
[qb]

Code

<?php
echo '<img src="this.gif" alt="something" />
';
echo "<a href="#" onclick="return confirm('Are you sure?\nThis action can\'t be undone!');">delete</a>";
?>

[/qb]

That's the kind of example that proves that all programmers are insane.

Well, of course, but that's a given. Err, I mean that's a givenn...