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<?php $array1 = array ( '2019-04-29' => array ( 0 => 366, 1 => 82, 2 => 44 ), '2019-04-30' => array ( 0 => 330, 1 => 115, 2 => 55 ) ); $array2 = array(492, 500); $array1 = array_values($array1); foreach ($array2 as $k => &$v) { $v = array_merge(array($v), $array1[$k]); } print_r($array2);
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.32, 8.0.0 - 8.0.24, 8.1.0 - 8.1.11
Array ( [0] => Array ( [0] => 492 [1] => 366 [2] => 82 [3] => 44 ) [1] => Array ( [0] => 500 [1] => 330 [2] => 115 [3] => 55 ) )

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