Question

everywhere I found solutions for removing duplicate entries in php or mysql. But all those solutions removed the whole row, but I just want to remove the value of a column. for example I have this SELECT in mysql:

SELECT HE_FRUIT as fruit, CA_FRUIT as candy, CA_FRUIT_NAME as name, CA_FRUIT_color as color 
FROM fruits LEFT JOIN candy ON HE_FRUIT_ID = CA_FRUIT_ID 
WHERE CA_FRUIT_COUNTRY LIKE '%usa%' 
GROUP BY CA_FRUIT_TITLE 
ORDER BY CA_FRUIT_PRIO, CA_FRUIT_HE

I print the array and I get this:

array
  0 => 
      array
      fruit = "APPLE"
      candy = "lolly"
      name = "xxx"
      color = "green"
   1 => 
      array
      fruit = "APPLE"
      candy = "gum"
      name = "xxx"
      color = "blue"
  2 => 
      array
      fruit = "APPLE"
      candy = "candy"
      name = "xxx"
      color = "red"
  3 => 
      array
      fruit = "BANANA"
      candy = "lolly"
      name = "xxx"
      color = "yellow"

What I want to have is:

  0 => 
      array
      fruit = "APPLE"
      candy = "lolly"
      name = "xxx"
      color = "green"
   1 => 
      array
      fruit = ""
      candy = "gum"
      name = "xxx"
      color = "blue"
  2 => 
      array
      fruit = ""
      candy = "candy"
      name = "xxx"
      color = "red"
  3 => 
      array
      fruit = "BANANA"
      candy = "lolly"
      name = "xxx"
      color = "yellow"

So it’s only the value of the column fruit that should be removed, but all the rest should stay.

Does someone has an idea how I could solve this problem, without to much extra code?

Thanks so much in advance?

Answer 1

Try this :

<?php

    $data = array(
      0 => array(
          'fruit' => "APPLE",
          'candy' => "lolly",
          'name' => "xxx",
          'color' => "green"
      ),
      1 => array(
          'fruit' => "APPLE",
          'candy' => "gum",
          'name' => "xxx",
          'color' => "blue"
      ),
      2 => array(
          'fruit' => "APPLE",
          'candy' => "candy",
          'name' => "xxx",
          'color' => "red"
      ),
      3 => array(
          'fruit' => "BANANA",
          'candy' => "lolly",
          'name' => "xxx",
          'color' => "yellow"
      )
    );

    foreach($data as $i => $dataRow)
    {
        foreach($dataRow as $fieldName => $fieldValue)
        {
            for($j=0; $j<$i; $j++)
            {
                if($data[$j][$fieldName] == $fieldValue)
                {
                    $data[$i][$fieldName] = '';
                }
            }
        }
    }

    print_r($data);

?>