PHP Insert data into mysql on duplicate key update - add suffix -

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want insert duplicate entry mysql suffix. here example:

+-------+--------------+-------+ | id    | title        | url   | +-------+--------------+-------+  +-------+--------------+-------+ | 1     | test         | test1 | +-------+--------------+-------+ | 2     | test         | test2 | +-------+--------------+-------+ | 3     | test         | test3 | +-------+--------------+-------+

means, want add auto number suffix end of each url have duplicate title. titles duplicated url kinda unique.

here query:

 $i = 0;     $i++;      $sql = "insert `content` (title, text, cat, url, tag)     values ('".$_post["title"]."', '".$_post["text"]."', '".$_post["category"]."', '".$_post["url"]."', '".$_post["tag"]."') on duplicate key update url=".$_post["url"]."+". $i ."";

note: url made dynamically based on title entry. query not working, wrong code?

update: here error after run query:

error: insert content (title, text, cat, url, tag) values ('test', '', '16', 'test', '') on duplicate key update url=test+1 unknown column 'test' in 'field list'

your code has strange things. $i = 0; followed $i++; equivalent doing $i = 1; again, what's purpose on setting variable use once?

what need is:

  1. insert query forgetting "url" field , removing on duplicate...

  2. get id of last insert. have @ following link see how value: http://www.w3schools.com/php/php_mysql_insert_lastid.asp

  3. update query set value of "url"

    $_post["url"].$id_of_last_query

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