Example my array
$options = array(
array("brand" => "Puma","code" => "p01","name" => "Puma One"),
array("brand" => "Puma","code" => "p02","name" => "Puma Two"),
array("brand" => "Puma","code" => "p03","name" => "Puma Three"),
array("brand" => "Nike","code" => "n01","name" => "Nike One"),
array("brand" => "Nike","code" => "n02","name" => "Nike Two"),
array("brand" => "Nike","code" => "n03","name" => "Nike Three"),
array("brand" => "Nike","code" => "n04","name" => "Nike Four"),
array("brand" => "Adidas","code" => "a01","name" => "Adidas One"),
array("brand" => "Adidas","code" => "a02","name" => "Adidas Two"),
array("brand" => "Adidas","code" => "a03","name" => "Adidas Three"),
array("brand" => "Adidas","code" => "a04","name" => "Adidas Four"),
array("brand" => "Adidas","code" => "a05","name" => "Adidas Five"),
array("brand" => "Adidas","code" => "a06","name" => "Adidas Six")
);
How to generate this array to be
<select name="products" id="products">
<optgroup label="Puma">
<option value="p01">Puma One</option>
<option value="p02">Puma Two</option>
<option value="p03">Puma Three</option>
</optgroup>
.......
<optgroup label="Adidas">
<option value="a01">Adidas One</option>
<option value="a02">Adidas Two</option>
<option value="a03">Adidas Three</option>
.......
</optgroup>
</select>
Or you can suggestion better array according to my select option output. Let me know.
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";
}