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PHP Insert statment incorrect values

dsg138 asked
Last Modified: 2015-04-21
I have some code where my users are required to choose a team.  There are 32 different buttons,, one for each team.
If the player chose team #5, the value "teamid" would be 5 and the following would be inserted into the DB:
-  UserID = 100 //for example
-  XMLID = l.mlb.com-t.5
-  WeekNum = 1  //if it were week #1

This would be a correct entry.  Most entries get successfully inserted.

Occasionally, I get the following added to my DB which is Incorrect and causes issues:
-  UserID = 100 //for example
-  XMLID = l.mlb.com-t.
-  WeekNum = 1  //if it were week #1
If this is added to my DB, it causes an issue since the user thinks their Team 5 went through, but it really didn't.

I'm not sure how this is possible since each of the buttons contains a different teamid.

Is there a way I can modify my code below so that the incorrect values never get inserted into my php database?

Code is below.  

if( isset($_POST["teamid"]) ){

    $finalteam = "l.mlb.com-t." . $_POST["teamid"];
<div class="notification success">
        <div class="text">
        	<p><strong>Success!</strong> Your selection has been saved! </p>

$PickID = $a4[XMLID];

	UserID = '$MemberID',
	XMLID = '$finalteam',
	WeekNum = '$PickWeek'"
$sql = mysql_query($sql);


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Again, the above scenario is rare, but it's been happening now about 1% of the time.  I'm trying to isolate it and it possibly could be due to a mobile browser.  Any suggestions on how I can modify my statement?
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