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<?php $data = [ [ 'record_id' => 3, 'task_date' => '2018-10-02' ], [ 'record_id' => 5, 'task_date' => '2018-10-02' ], [ 'record_id' => 1, 'task_date' => '2018-09-27' ] ]; $out = []; $datesIterated = []; foreach ($data as $date) { if(in_array($date['task_date'], $datesIterated)) { continue; } $out[] = array_values(array_filter($data, function($item) use ($date) { if ($item['task_date'] == $date['task_date']) { return $item; } })); $datesIterated[] = $date['task_date']; } var_dump($out);
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
array(2) { [0]=> array(2) { [0]=> array(2) { ["record_id"]=> int(3) ["task_date"]=> string(10) "2018-10-02" } [1]=> array(2) { ["record_id"]=> int(5) ["task_date"]=> string(10) "2018-10-02" } } [1]=> array(1) { [0]=> array(2) { ["record_id"]=> int(1) ["task_date"]=> string(10) "2018-09-27" } } }
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 array(2) { [0]=> array(2) { [0]=> array(2) { ["record_id"]=> int(3) ["task_date"]=> string(10) "2018-10-02" } [1]=> array(2) { ["record_id"]=> int(5) ["task_date"]=> string(10) "2018-10-02" } } [1]=> array(1) { [0]=> array(2) { ["record_id"]=> int(1) ["task_date"]=> string(10) "2018-09-27" } } }

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