php array sort keep keys code example

Example 1: php sort array by key

$weight = [
    'Pete' => 75, 
    'Benjamin' => 89,
    'Jonathan' => 101
  ];  	
  ksort($weight);

Example 2: php rsort retain keys

//Sort an array in reverse order and maintain index association
arsort($myArray)

Example 3: php array sort by key value

To PHP sort array by key, you should use: 
	ksort() (for ascending order) or krsort() (for descending order). 
      
To PHP sort array by value, you will need functions:
	asort() and arsort() (for ascending and descending orders).

Example 4: php sort array remove keys

$arr = array(1, 2, 3);
unset($arr[0]);
$arr = array_values($arr);

print_r($arr);
//Array ( [0] => 2 [1] => 3 )

Example 5: php order array by specific key

function cmp($a, $b)
    {
        return strcmp($a->display_name, $b->display_name);
    }

    usort($blogusers, "cmp");

    foreach ($blogusers as $bloguser)
    {
        ...