显示两个数组的值，并使用Mysql和php中的foreach将其保存在数据库中

I have two arrays, the array that holds the child name and the other one is an array that holds the birthday of the child. This is the design of my form that the user will fill up. enter image description here

<div id="Children">
  <div class="form-group col-md-7">
    <label for="child">Name of Child</label>
    <input type="text" class="form-control" name="child[]" id="child" placeholder="FULL NAME">
  </div>

  <div class="form-group col-md-5">
    <label for="ch_DateOfBirth">Date of Birth</label>
    <input type="text" class="form-control date-picker" name="ch_DateOfBirth[]" id="DateOfBirth" placeholder="Date of Birth">

  </div>

and this is my php code for saving the two arrays in the database.

$child_name=$_POST['child'];
$child_bday=date('Y-d-m', strtotime($_POST['ch_DateOfBirth']));
$count=count($child_name);

for ($i=0; $i < $count ; $i++) { 
  $sql6="INSERT into  tbl_children (Emp_ID, Ch_Name, Ch_Bdate) values ('".$emp_id."', '".$child_name[$i]."', '".$child_bday[$i]."') ";
    $dbcon->query($sql6);
}

but whenever i tried to do so, only the name of the children are saved excluding their birthdays. How can I save it using foreach if possible?

enter image description here

</div>

Hope this will works

$child_name=$_POST['child'];
$count=count($child_name);

for ($i=0; $i < $count ; $i++) {
  $child_bday=date('Y-d-m', strtotime($_POST['ch_DateOfBirth'][$i]));
  $sql6="INSERT into  tbl_children (Emp_ID, Ch_Name, Ch_Bdate) values ('".$emp_id."', '".$child_name[$i]."', '".$child_bday."') ";
  $dbcon->query($sql6);
}