如何使用jquery [duplicate]访问php变量

Question

This question already has an answer here:

• How do I pass variables and data from PHP to JavaScript? 19 answers

hi i want to get the this php variable by jquery and use it for ajax this my php code and i use it in php page

function product($li)
{
    $result = mysqli_query($li, "SELECT * FROM product ORDER BY id ASC") or die(mysqli_error($li));

    while ($Row = mysqli_fetch_array($result)) {
        echo "<div class='product'>";

        echo "<img src=" . $Row['imageurl'] . " width='100' height='75'>";
        echo $Row['farsiname'];
        echo $Row['englishname'];
        echo $Row['description'];
        echo $Row['price'];
            echo getid($li , $Row['id']);
           echo '<button class="add_to_cart">برو تو سبد</button>';
        echo '<input type="hidden" class="id" name="productid" value="' . $Row['id'] . '" />';

        echo '</div>';
    }
}

i want to get $row['id'] by jquery when i click button please help me!

</div>

Answer 1

$('.add_to_cart').on('click',function(){
  alert($(this).closest('.product').find('.id').val())
})