[Solved] php pull field with variable+string

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Context: OP posted his code within the comments; https://pastebin.com/LM1ecp13

Solution:
This line;
$fetch = mysqli_fetch_array(mysqli_query($conn,"SELECT id, name, price FROM stock WHERE id='$cart[wid]'"));
Is the problem. You are selecting id, name, price but you are missing 28price hence why you are getting the undefined index error…

Your query should be "SELECT id, name, price, 28price FROM stock WHERE id='$cart[wid]'"

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solved php pull field with variable+string