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<?php $students= array( array("name"=>"...", "gender"=>"male"), array("name"=>"...", "gender"=>"female"), array("name"=>"...", "gender"=>"female"), array("name"=>"...", "gender"=>"female"), array("name"=>"...", "gender"=>"male"), array("name"=>"...", "gender"=>"male"), array("name"=>"...", "gender"=>"male"), ); $males = array_values(array_filter($students, function($s) { return $s['gender'] === "male"; })); $females = array_values(array_filter($students, function($s) { return $s['gender'] === "female"; })); $final = array(); $max = max(count($females), count($males)); for ($i=0; $i<$max; $i++) { if (isset($males[$i])) { $final[] = $males[$i]; } if (isset($females[$i])) { $final[] = $females[$i]; } } print_r($final);
Output for 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
Array ( [0] => Array ( [name] => ... [gender] => male ) [1] => Array ( [name] => ... [gender] => female ) [2] => Array ( [name] => ... [gender] => male ) [3] => Array ( [name] => ... [gender] => female ) [4] => Array ( [name] => ... [gender] => male ) [5] => Array ( [name] => ... [gender] => female ) [6] => Array ( [name] => ... [gender] => male ) )

preferences:
152.57 ms | 409 KiB | 5 Q