Question

If I have an associative array like this

$array = array();
$array['e01'] = '03/16/2012';
$array['e02'] = '03/14/2012';
$array['e05'] = '03/01/2014';

I’d like to sort the array by date then loop through the results to get the value of the index, i.e. e01, e02, e05. I need that index to retrieve information from an object.

Answer 1

From the PHP documentation on asort(). This will sort it by value and let you access the key and value of each index:

$fruits = array("d" => "lemon", "a" => "orange", "b" => "banana", "c" => "apple");
asort($fruits);
foreach ($fruits as $key => $val) {
    echo "$key = $val\n";
}