Answers for "sorting multidimensional array in php"

php sort multidimensional array

function sortByAge($a, $b) {
    return $a['age'] > $b['age'];
}
$people=[
    ["age"=>54,"first_name"=>"Bob","last_name"=>"Dillion"],
    ["age"=>22,"first_name"=>"Sarah","last_name"=>"Harvard"],
    ["age"=>31,"first_name"=>"Chuck","last_name"=>"Bartowski"]
];

usort($people, 'sortByAge'); //$people is now sorted by age (ascending)

php sort multidimensional array

array_multisort(array_map(function($element) {
      return $element['order'];
  }, $array), SORT_ASC, $array);

print_r($array);

php sort multidimensional array by value

function sortByOrder($a, $b) {
    return $a['order'] - $b['order'];
}

usort($myArray, 'sortByOrder');

php sort multidimensional array by value

usort($myArray, function($a, $b) {
    return $a['order'] <=> $b['order'];
});

sort multidimensional array php by key

$people= array(
    array("age"=>54,"first_name"=>"bob","last_name"=>"Dillion"),
    array("age"=>22,"first_name"=>"darah","last_name"=>"Harvard"),
    array("age"=>31,"first_name"=>"ahuck","last_name"=>"Bartowski"),
);

echo '<PRE>';
print_r($people);


$keys = array_column($people, 'first_name');
print_r($keys);

array_multisort($keys, SORT_ASC, $people);

print_r($people);