MySQLI的问题

I'm probably just too tired, and looking over a small error, but this code will not input any information into my database.

$sql = "INSERT INTO TABLE_NAME (UPC, Description, Make, Model, SNLocation, IMEI_MEID, Resetting, Notes, Image)

VALUES ($UPC, $Desc, $Make, $Model, $SNLocation, $IMEI_MEID, $Resetting, $Notes, $Image)";

mysqli_query($con, $sql) or die(mysqli_error($sql));

Could someone help me check if this has syntax issues or something?

Its because you had an error

$sql = "INSERT INTO TABLE_NAME (UPC, Description, Make, Model, SNLocation, IMEI_MEID, Resetting, Notes, Image)  

VALUES ('$UPC', '$Desc', '$Make', '$Model', '$SNLocation', '$IMEI_MEID', '$Resetting', '$Notes', '$Image')";

removed ] from Notes, Image)] <----- and values need to be quoted

You need to remove ] and enclose string values with single quotes(') :

$sql = "INSERT INTO TABLE_NAME
       (UPC, Description, Make, Model, 
       SNLocation, IMEI_MEID, Resetting, Notes, Image)] <-- Here --> 

VALUES ($UPC, $Desc, $Make, $Model, $SNLocation, $IMEI_MEID, $Resetting, $Notes, $Image)";

mysqli_query($con, $sql) or die(mysqli_error($sql));