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POChecking if a url is already submitted in database in php
 

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  1. POChecking if a url is already submitted in database in php
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    <p>What i need get done is checking if a url is already submitted in database using php.</p> <p>I have a database table where i store URLS submitted by users. But i want to check if the urls are already submitted or not in the database before inserting it to the database. For example, URLS like <a href="http://www.example.com" rel="nofollow noreferrer">http://www.example.com</a>, <a href="http://www.example.com/" rel="nofollow noreferrer">http://www.example.com/</a>, <a href="http://example.com" rel="nofollow noreferrer">http://example.com</a> and <a href="http://example.com/" rel="nofollow noreferrer">http://example.com/</a> should return false if any one of them is already inserted in database as they all are same urls. I think we can get this done by using regular expression.But i am a little weak in regex so need your help. thank you</p> <p><strong>Edited</strong></p> <p>Hello, let's assume if the urls are in array not database just to make clear. I know about the unique key and matching url with the result from database. But here i have a </p> <p>different question if you look at it carefully.</p> <p>$urls = array('<a href="http://www.example.com/newpage.html" rel="nofollow noreferrer">http://www.example.com/newpage.html</a>', '<a href="http://www.example.com/newpage.html" rel="nofollow noreferrer">http://www.example.com/newpage.html</a>');</p> <p>case A user submits a url. suppose <a href="http://example.com/newpage.html" rel="nofollow noreferrer">http://example.com/newpage.html</a></p> <p>Now as a url <a href="http://www.example.com/newpage.html" rel="nofollow noreferrer">http://www.example.com/newpage.html</a> is available in $urls array and <a href="http://www.example.com/newpage.html" rel="nofollow noreferrer">http://www.example.com/newpage.html</a> and <a href="http://example.com/newpage.html(userinput" rel="nofollow noreferrer">http://example.com/newpage.html(userinput</a> without www) are same page so i need a function to check it and return false if the url is available in the array. I hope i clarified my self now.</p> <p>So it's not checking a domain or making unique key in mysql table for url field i think so far. I think we need to use regExp for it. Any help?</p>
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    1. CO`www.example.com` and `example.com` are *not* the same URLs.
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      1. USBen James
    2. CObut i want to asume they both are same as most of the time are same.
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      1. USYalamber
    3. COTry ridding of any trailing `/` before the check. This will make `http://www.example.com/` and `http://www.example.com` match. As for the `www` part, Ben's right. If you're really sure about assuming `www` and nothing are the same, try replacing `www.` with blank when adding any URL. That way, you will have `example.com` instead of `www.example.com` for all the records in your database, letting you match properly.
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      1. UScasraf
 

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