使用PHP更新具有相同ID的多个值

Question

I'm trying to change my values in database.. In my database it saved like this

ID                  COLOR
1                    RED
1                    BLUE
1                    GREEN

I want to update all id which is 1 in my color category

Now i want to update it like this

 Color1 : RED  to BLACK
 Color2 : BLUE to YELLOW
 Color3: GREEN To WHITE

But when i click update.. The result become like this

Color1 : WHITE 
Color2 : WHITE
Color3:  WHITE

How am i able to save the fix that?

Here's my code.

HTML FORM

<div class='control-group'>
   <div style='margin-left: 25px; margin-top:-5px;'>
    <label style='display: inline-block !important; vertical-align: middle; float: left; font-weight: bold; margin-left:40px;'> Color Combination $x &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</label>

   <div class='controls'>
   <select name='color1[]' class='form-control'  id='color1' onchange='getcolor()'><option value=''>$test</option>
    ";

 $statement = $db->prepare("SELECT * FROM color order by colorName ASC");
   $statement->execute();

     while($rows = $statement->fetch(PDO::FETCH_ASSOC)) {
echo "<option value='" .$rows['colorName']. "'>" . $rows['colorName'] . " - " . $rows['colorCode'] ."</option>";
        }

echo "</select>";

MY SUBMIT CODES

if (isset($_POST['submit'])) {

$color1 = $_POST['color1'];
$count = count($color1);

 for ($x = 0; $x <=$count; $x++) {

    if($color2[$x] == "")
    {   
     $savecolor = $color1[$x];

$stmt = $db->prepare('UPDATE productcolor set colorName = :color WHERE productinformationID=:productinformationID');
$stmt->execute(array(':color' => $savecolor, ':productinformationID' => $prodID));
    }
}   

} 

But when i echo $savecolor = $color1[$x]; it display the color that i chose but when it comes in saving its not..

Answer 1

You will need AND condition to specify which color should be updated.

For example:

UPDATE productcolor
SET colorName = :color
WHERE productinformationID=:productinformationID
AND colorName = :colorName

:colorName should be the color to be changed.