Block Stories with Duplicate Title

[tesurrajan]

When user submits a story he needs to enter Story Title but if a story with the same title already exists it does not gives an error saying something like "A story with the same title already submitted. Try different title."

And story is submitted with duplicate title however, the URL for this submission is changed with an addition of number in the end of the URL like 1 or 2.

How To Block Stories with Duplicate Title?

[DAX]

Pligg is not made to do that.
Pligg is intentionally made to allow duplicate titles. That's why you see the number at the end of the url.

[tesurrajan]

I found a function duplicates_title($title) in libs->link.php but I was unable to make it work. I tried to write the code given below in submit.php under "// assign any errors found during submit".

if(utf8_strlen($linkres->duplicates_title($title) > 0) {
$main_smarty->assign('submit_error', 'dup_title');
$error = true;
}


Please assist me to write a working code.