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Getting the highest value, then adding 1


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I have a database for storing the information of documents that users upload. I'm organizing the new entries by ID numbers (as traditionally done). When creating a new row, I'm having difficulty getting the last ID/highest ID so I can add 1 for the new ID of the new row. The code that I've been trying to fix (below) does well until I get to the 10th ID. After that, it recognizes "9" as the largest ID.


$result = mysql_query("SELECT * FROM resources ORDER BY resource_id DESC");

$current = mysql_fetch_array($result);


$id = $current[resource_id] + 1;


How can this be resolved or what way would be better for performing this task? Thanks!


(MySQL version 4.1.21)

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