<?php // this $b-$a is for desc, for asc try $a-$b function sorting_by_count($a, $b) { return trim($b['expiry_date']['count'],'()') - trim($a['expiry_date']['count'],'()'); } $array = [ [ 'certificate_name' => 'track.site', 'domains' => 'track.site', 'expiry_date' => [ 'date' => '2018-09-25', 'time' => '10:11:58', 'count' => '(22)', ] ], [ 'certificate_name' => 'stats.com', 'domains' => 'stats.com', 'expiry_date' => [ 'date' => '2018-09-24', 'time' => '10:11:58', 'count' => '(43)', ] ] ]; usort($array, 'sorting_by_count'); print_r($array); ?>
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