3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = Array ( 0 => Array ( 'hashtag' => 'a7e87329b5eab8578f4f1098a152d6f4', 'title' => 'Flower', 'order' => 3, ), 1 => Array ( 'hashtag' => 'b24ce0cd392a5b0b8dedc66c25213594', 'title' => 'Free', 'order' => 2, ), 2 => Array ( 'hashtag' => 'e7d31fc0602fb2ede144d18cdffd816b', 'title' => 'Ready', 'order' => 1, ) ); array_multisort(array_map(function($element) { return $element['order']; }, $array), SORT_ASC, $array); print_r($array);
based on jGPMY
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.21, 7.4.0 - 7.4.9, 8.0.0alpha1 - beta1
Array ( [0] => Array ( [hashtag] => e7d31fc0602fb2ede144d18cdffd816b [title] => Ready [order] => 1 ) [1] => Array ( [hashtag] => b24ce0cd392a5b0b8dedc66c25213594 [title] => Free [order] => 2 ) [2] => Array ( [hashtag] => a7e87329b5eab8578f4f1098a152d6f4 [title] => Flower [order] => 3 ) )