链接不要求用户确认

Question

I have this code

echo '<div class="bottomright"><a href="?id='
                . $topic_id
                . '&part=5"><img src="../assets/icons/Comments-    edit.png" /></a><a href="?id='
                . $topic_id
                . '&part=6"><img src="../assets/icons/Lock.png" /></a><a href="#" onclick="return confirm("Are you sure?")"><img src="../assets/icons/Trash.png" /></a></div>'; 

When I click Trash.png it is supposed to ask "Are you sure"? But it doesn't...

Am I missing something here?

Answer 1

Here's the problem:

onclick="return confirm("Are you sure?")"

Note the quote ambiguity. You have to change the quote symbols somehow to pair properly, probably by escaping a set of single quotes. Both of the following work:

onclick="return confirm(\\'Are you sure?\\')"

onclick=\\'return confirm("Are you sure?")\\'

Answer 2

<a href="#" onclick="return confirm(\'Are you sure?\')">

You have to escape single quotes.

Because:

• onclick="return confirm("Are you sure?")" is not JavaScript valid. (notice " conflict)

• onclick="return confirm('Are you sure?')" would not be PHP valid (notice ' conflict because the whole echo function is wrapped inside single quotes)

Another option, would be to do this:

'<a href="#" onclick="return confirm('. "'Are you sure?'" .')">'

Which actually closes the echo quotes, concatenates the 'Are you sure?' and concatantes the rest.