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<?php $array1 = [ [ ["startDate" => "2022-01-01", "endDate" => "2022-01-31"], ["startDate" => "2022-02-01", "endDate" => "2022-02-28"], ["startDate" => "", "endDate" => "", "bannerUrl" => "https://commons.wikimedia.org/wiki/File:Red_rose_flower_detailed_imge.jpg", "imageTarget" => "image Target"] ], [ ["startDate" => "2022-01-01", "endDate" => "2022-01-15"] ] ]; $array2 = [ [ ['image' => (object) ["image A object...."]], ['image' => (object) ["image B object...."]] ], [ ['image' => (object) ["image C object...."]] ], ]; foreach ($array2 as $i1 => $rows) { foreach ($rows as $i2 => $row) { $array1[$i1][$i2] += $row; } } var_export($array1);
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
array ( 0 => array ( 0 => array ( 'startDate' => '2022-01-01', 'endDate' => '2022-01-31', 'image' => (object) array( '0' => 'image A object....', ), ), 1 => array ( 'startDate' => '2022-02-01', 'endDate' => '2022-02-28', 'image' => (object) array( '0' => 'image B object....', ), ), 2 => array ( 'startDate' => '', 'endDate' => '', 'bannerUrl' => 'https://commons.wikimedia.org/wiki/File:Red_rose_flower_detailed_imge.jpg', 'imageTarget' => 'image Target', ), ), 1 => array ( 0 => array ( 'startDate' => '2022-01-01', 'endDate' => '2022-01-15', 'image' => (object) array( '0' => 'image C object....', ), ), ), )

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