如何将php变量传递给ajax数据

How can I send PHP variable sprod into ajax i need to send this id to check.php page

<script>
function getState(val) {

    $.ajax({
    type: "POST",
    url: "check.php",
    data: {id: val, id2:$prod },
    dataType:'json',
    success: function(data){
        $("#style_code").children().remove();
        $("#style_image").children().remove();

         data.option.forEach(function (item) {
                $("#style_code").append('<option value="' + item.color_name + '">' + item.size + '</option>');
                $('#style_image').append('<img  src="images/'+item.image_name+'" data-imagezoom="true" class="img-responsive" alt="" />')               
            //$("#style_image").html(data);
            });
    }
    });
}
</script>

<script>
 var prod = <?php echo $prod ?>;
</script>

Note

This should only works if your page is in .php extension

use <?php echo $prod ?> to access php variables in ajax.

 data: {id: val, id2:<?php echo $prod ?> },

You can use <?php ?> tags in your script because you run it into ur .php file.

But you need to to open the <?php ?> tags to use php in the script tags.

Change

data: {id: val, id2:$prod },

To

data: {'id':val, 'id2':<?php echo $prod ?> },

Also(Better by my oppinion)

data: {'id': val, 'id2':<?= $prod ?> },

U can use <?=?> instead of <?php ?> to print something, so you don't need to write echo again.