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Validiating Field Before Updating


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I have a php page called "tenders-add.php" that allows the user to add a record to the "tenders" table. The first field in the table is called "ID" and this field needs to be unique.

In javascript, I have validated that the field is not empty, but I need to check somehow in my php code that this field is also unique to the table.

I am stuck on how to accomplish this.


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