Foreach TextBox in form in PHP

<?php
$dependents = $_POST['dependentsname'];
$age = $_POST['age'];

foreach ($dependents as $key1 => $value1){
//            $value =$dependents[$key1];
foreach ($age  as $key2 => $value2){
echo $insert_dependents="INSERT INTO `dependents`(`d_name`, `d_age`)
                                       VALUES ($value1,$value2)";
echo "<br>";
}
echo "<br>";
}
?>



    <div id="Dependents_left">
    <u>DEPENDENTS:</u>
    <table>
        <tr>
            <th>NAME</th>
            <th>AGE</th>
            <th>NAME</th>
            <th>AGE</th>
        </tr>
        <tr>
            <td>1. <input type="text" name="dependentsname[]"></td>
                    <td><input type="text" name="age[]"></td>
            <td>3. <input type="text" name="dependentsname[]"></td>
                    <td><input type="text" name="age[]"></td>  
        </tr>
        <tr>
            <td>2. <input type="text" name="dependentsname[]"></td>
            <td><input type="text" name="age[]"></td>
            <td>4. <input type="text" name="dependentsname[]"></td>
            <td><input type="text" name="age[]"></td>
        </tr>
    </table>

<?php
$dependents = $_POST['dependentsname'];
$age = $_POST['age'];
for($i=0;$i<count($dependents);i++)
{
    echo $insert_dependents="INSERT INTO `dependents`(`d_name`, `d_age`)VALUES ($dependents[$i],$age[$i])";
    echo "<br>";
} 
?>