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<?php $workers = array(); $workers[0] = array('a' =>1, 'b'=> 34, 'unitId'=>4); $workers[1] = array('a' =>1, 'b'=> 34, 'unitId'=>5); $workers[2] = array('a' =>1, 'b'=> 34, 'unitId'=>6); $workers[3] = array('a' =>1, 'b'=> 34, 'unitId'=>7); $workers[4] = array('a' =>1, 'b'=> 34, 'unitId'=>8); $workers[5] = array('a' =>1, 'b'=> 34, 'unitId'=>9); $units = array(); foreach($workers as $worker){ $units[] = $worker['unitId']; } var_dump($units);
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 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 - 8.3.6
array(6) { [0]=> int(4) [1]=> int(5) [2]=> int(6) [3]=> int(7) [4]=> int(8) [5]=> int(9) }

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