AJAX删除数据库条目

Question

I am new to AJAX (and website development in general) and I am having trouble deleting a database entry in wordpress using jQuery and AJAX.
The user selects an entry in a table and clicks a button to delete it. The table is created using datatables plugin and extensive coding to make it work the way I need it to.
the jQuery code is in functions.php and the actual query is in a file on the server.
I have been using this how to delete records from database with an Ajax as a baseline for the code. Also, note that I am using wordpress My problem is that it does not seem to delete the entry from the database.

Here is the code in functions.php:

var GroupID2Del = dt.row({
        selected: true
    })
    .data()[23];
if (confirm('Are you sure you want to delete this row?')) {
    jQuery.ajax({
        type: 'POST',
        url: '/wp-content/AJAX/ViewTable_DeleteEntry.php',
        data: 'groupid=' + GroupID2Del,
        success: function(data) {
            dt.row({
                    selected: true
                })
                .remove();
            jQuery('#UserTable')
                .DataTable()
                .draw();
            alert(data);
        }
    });
}

GroupID2Del is how I am getting the id for it the selected row in the table. I am then removing the row from the table itself. The row does get removed.

Here is the ViewTable_DeleteEntry.php

<?php
    $dataPosted = $_POST['groupid'];
    $sql = ('delete from wp_piic_formmaker_submits WHERE form_id = 13 and group_id =' . $dataPosted);
    mysql_query($sql);
    $count = mysql_affected_rows();
    print $count; 
?>

alert in function.php provides the correct sql, but the $count is empty since it does not actually delete anything.

Answer 1

Please Try This:

 var myKeyVals = { groupid : GroupID2Del}
    jQuery.ajax(
      {
         type: 'POST',
         url: '/wp-content/AJAX/ViewTable_DeleteEntry.php',
         data: myKeyVals,
         success: function(data)
         {
            dt.row({selected: true }).remove();                                             
            jQuery('#UserTable').DataTable().draw();
            alert(data);
         }
     });

AND

$dataPosted = $_POST['groupid'];
if($dataPosted != ''){
$sql = ('delete from wp_piic_formmaker_submits WHERE form_id = 13 and group_id ='.$dataPosted);
    mysql_query($sql); 

$count = mysql_affected_rows();
} else {
echo 'Blank Record';
}