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<?php $array = [ 'radios1' => [ 'on', ], 'empty' => [ '', ], 'from' => [ '', 'Bangalore', null, 0, ] ]; $result = []; foreach ($array as $key => $items) { foreach ($items as $item) { if ($item) { $result[$key][] = $item; } } } var_export($result);
Output for 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 - 8.3.27, 8.4.1 - 8.4.14
array ( 'radios1' => array ( 0 => 'on', ), 'from' => array ( 0 => 'Bangalore', ), )

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193.08 ms | 407 KiB | 5 Q