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<?php $q_list = array ( 0 => array ( 'id' => '2', 'subject_id' => '1', 'question' => 'Question No One', 'recordstatus' => '1', ), 1 => array ( 'id' => '3', 'subject_id' => '1', 'question' => 'Question No Two', 'recordstatus' => '1', ), 2 => array ( 'id' => '4', 'subject_id' => '1', 'question' => 'Question No Three', 'recordstatus' => '1', ), ); foreach($q_list as $q){ $res[$q['subject_id']][] = $q; } var_dump($res);
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 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(1) { [1]=> array(3) { [0]=> array(4) { ["id"]=> string(1) "2" ["subject_id"]=> string(1) "1" ["question"]=> string(15) "Question No One" ["recordstatus"]=> string(1) "1" } [1]=> array(4) { ["id"]=> string(1) "3" ["subject_id"]=> string(1) "1" ["question"]=> string(15) "Question No Two" ["recordstatus"]=> string(1) "1" } [2]=> array(4) { ["id"]=> string(1) "4" ["subject_id"]=> string(1) "1" ["question"]=> string(17) "Question No Three" ["recordstatus"]=> string(1) "1" } } }
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(1) { [1]=> array(3) { [0]=> array(4) { ["id"]=> string(1) "2" ["subject_id"]=> string(1) "1" ["question"]=> string(15) "Question No One" ["recordstatus"]=> string(1) "1" } [1]=> array(4) { ["id"]=> string(1) "3" ["subject_id"]=> string(1) "1" ["question"]=> string(15) "Question No Two" ["recordstatus"]=> string(1) "1" } [2]=> array(4) { ["id"]=> string(1) "4" ["subject_id"]=> string(1) "1" ["question"]=> string(17) "Question No Three" ["recordstatus"]=> string(1) "1" } } }

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