Question

I have a PHP form that shows data from a MySQL table. Each row obviously has different data, what I want to do is have a drop down list that displays data relevant to the data entry in each row.

for example, lets say I have two tables. Fruit and Fruit_Colors, as below:

so if my PHP Form was displayed as below, the MySQL data named fruits would display the data in the Fruit column. The color would then be fetched from the Fruit_Colors table depending on the PHP form output value in field ‘Fruit’. so the drop down list for each row will be different.

my PHP form table syntax is:

<table id="hor-minimalist-a">
    <tr>
        <th>ID</th>
        <th>Fruit</th>
        <th>Color</th>
        </tr>
<? while($row = $fruits->fetch(PDO::FETCH_ASSOC)) { ?>
    <tr>
        <td><? echo $row['id']; ?></td>
        <td><? echo $row['fruit']; ?></td>
        <td><SELECT NAME="fruitcolor" id="fruitcolor">
            <OPTION VALUE=0 >
             *// what goes here???*
            </option>
            </SELECT> 
        </td>
    </tr>
<? } ?>
</table>

Any advice how I can complete this would be appreciated. remember this table could be up to 50 rows so need a dynamic way of passing the ‘fruit’ value to the drop down list.

Syntax I know for the drop down list populations is:

    function fruitcolor_dropdown($db)  
  {    
    $result = $db->query("select color from Fruit_Color where Fruit=*'outputted value'*"); 
    return $result; 
  } 
  $colors= fruitcolor_dropdown($db); 
  while($row = $colors->fetch(PDO::FETCH_ASSOC)) {
  $color=$row["color"];
  $optionsfruitcolors.="<OPTION VALUE=\"$color\">".$color; 
  }

Advice appreciated as always. Thanks and Regards.

Answer 1

It will be bad idea to connect and fire query two time when you can do it in single query-
you can see demo

$query = "select f.*,group_concat(color SEPARATOR '|') as fcolor from fruit F Left join fruit_color fc using (fruit) group by fc.fruit";

Above will be your query and you will loop it like below:

<? while($row = $fruits->fetch(PDO::FETCH_ASSOC)) { ?>
    <tr>
        <td><? echo $row['id']; ?></td>
        <td><? echo $row['fruit']; ?></td>
        <td><SELECT NAME="fruitcolor" id="fruitcolor">
            <OPTION VALUE=0 >
             <?php 
               $array = explode("|", $fcolor);
               $count = count($array);
               for($loop=0;$loop<$count;$loop) {
                 echo "<option>".$array[$loop]."</option>";
               }                                       
              ?>
            </option>
            </SELECT> 
        </td>
    </tr>
<? } ?>