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<?php $in = [ ["no" => "12345", "type" => 1], ["no" => "23456", "type" => 1], ["no" => "12345", "type" => 2], ]; $out = []; foreach ($in as ["no" => $no, "type" => $type]) { $out[$no][] = $type; } var_dump($out);
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
array(2) { [12345]=> array(2) { [0]=> int(1) [1]=> int(2) } [23456]=> array(1) { [0]=> int(1) } }
preferences:
67.33 ms | 402 KiB | 123 Q