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<?php $partners = [ 0 => ['id'=>1, 'name'=>'Tset', 'site'=>'www.ya.ru'], 1 => ['id'=>2, 'name'=>'Maks', 'site'=>'google.ru'] ]; $tmp = []; foreach ($partners as $item) { $tmp[] = [ 'id' => $item['id'], 'name' => $item['name'], ]; $tmp[] = [ 'id' => $item['id'], 'site' => $item['site'], ]; }; print_r($tmp);
Output for 5.5.0 - 5.5.37, 5.6.0 - 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 ( [0] => Array ( [id] => 1 [name] => Tset ) [1] => Array ( [id] => 1 [site] => www.ya.ru ) [2] => Array ( [id] => 2 [name] => Maks ) [3] => Array ( [id] => 2 [site] => google.ru ) )

preferences:
195.49 ms | 404 KiB | 233 Q