Online PHP editor | output for tXeb4

<?php $fieldArray = []; $fieldArray['field_val']['1'] = ['1']; $fieldArray['field_val']['2'] = ['1', '2', '3', '4']; $fieldArray['field_val']['3'] = ['5', '6', '7', '8']; $fieldArray['field_val']['4'] = ['9', '10', '11', '12']; $fieldArray['field_val']['5'] = ['30']; $temp = array_map(null, ...$fieldArray['field_val']); // transposing array foreach ($temp as $key => &$value) { foreach ($value as $key1 => &$value1) { if(empty($value1)){ // checking if empty // fetching key1 value from first array $value1 = $temp[0][$key1]; } } } echo implode("\n", array_map(function ($value) { // replace with br if web return implode(",", $value); }, $temp));