如何在PHP中循环遍历多个数组的数组

Question

I am trying to loop through array of arrays in php. Usually get stalked with complex array sometimes but I need your kind assistance with this.

var_dump($array) produced the array below:

    $arrayVal = array(6) {
      ["item_id"]=>
      array(2) {
        [0]=>
        string(1) "1"
        [1]=>
        string(1) "2"
      }
      ["request_explanation"]=>
      array(2) {
        [0]=>
        string(7) "Welcome"
        [1]=>
        string(11) "Hello World"
      }
      ["quantity"]=>
      array(2) {
        [0]=>
        string(1) "4"
        [1]=>
        string(1) "4"
      }
      ["unit_cost"]=>
      array(2) {
        [0]=>
        string(1) "4"
        [1]=>
        string(1) "3"
      }
      ["total_cost"]=>
      array(2) {
        [0]=>
        string(1) "0"
        [1]=>
        string(1) "0"
      }
      ["supporting_document"]=>
      string(0) ""
    }

My database table:

I want to be able to save each of the value in that array into the table above. Thanks for helping me.

Answer 1

Use the indexes of one of the sub-arrays to access all the other sub-arrays:

foreach ($array['item_id'] as $i => $item_id) {
    $request_explanation = $array['request_explanation'][$i];
    $quantity = $array['quantity'][$i];
    // repeat this for all the columns
    // Now you can insert all these variables into the database
}

Answer 2

Use a loop to build 2 separate arrays:

foreach($array['ExpensesList'] as $index => $val){
    $array1[$index] = $array['ExpensesList'][$index][0];
    $array2[$index] = $array['ExpensesList'][$index][1];
}

Then insert each array into your database individually.

This will not work if any sub array contains an index at 2, so this is explicitly for the example structure you provided.