The available answers led to the fact that I entered empty values into the database. I corrected this error by replacing the serialize () function with the following code.
$(document).ready(function(){
// When click the button.
$("#button").click(function() {
// Assigning Variables to Form Fields
var email = $("#email").val();
// Send the form data using the ajax method
$.ajax({
data: "email=" + email,
type: "post",
url: "your_file.php",
success: function(data){
alert("Data Save: " + data);
}
});
});
});