How do I group same array value

Question

Example my array

$options = array(
    array(\"brand\" => \"Puma\",\"code\" => \"p01\",\"name\" => \"Puma One\"),
    array(\"brand\" => \"Puma\"         


        

Answer 1

You can create another array keyed by the brand:

$newOptions = array();
foreach ($options as $option) {
  $brand = $option['brand'];
  $code = $option['code'];
  $name = $option['name'];

  $newOptions[$brand][$code] = $name;
}

This will produce an array like this:

$newOptions = array(
  'Puma' => array('p01' => 'Puma One', 'p02' => 'Puma Two'),
  'Nike' => array('n01' => 'Nike One', 'n02' => 'Nike Two'),
  ...
);

If you can directly format your array like this, you can skip the first step.

Then iterate over this new array and output the options:

foreach ($newOptions as $brand => $list) {
  echo "<optgroup label=\"$brand\">\n";
  foreach ($list as $code => $name)
    echo "<option value=\"$code\">$name</option>\n";
  echo "</optgroup>\n";
}