jQuery AJAX返回变量+值可能吗？

Question

I'm submitting a form via jQuery.ajax()

Now my PHP script is checking if a specific input field is empty, example:

$is_error = $user->is_error;

if($is_error !=0)
 { 
    echo $is_error;
 }

Back to my jQuery.ajax() , I'd like to check if the value of $error was true or not, within the sucess: part of the jQuery.ajax() call.

   jQuery.ajax({
           type: "POST",
           url: "edit.php", 
           data: jQuery("#idForm").serialize(),
           success: function(data)
       {   

        // show response from the php script if there is an error message
        // like:
        //         if(is_error) {show specific error message}
        //         else {show everything positive message}

       }
    });

Is it possible to check the PHP variable's value in there? Like if/else ?

Best regards!

Answer 1

if($_POST['name'] == "") 
  {
    $error = 1;
  }
else 
  {
    $error = 0;
  }
echo $error;

This code will echo the value.

 jQuery.ajax({
           type: "POST",
           url: "edit.php", 
           data: jQuery("#idForm").serialize(),
           success: function(data)
       {   

        // show response from the php script if $error == 0 or $error == 1.
        if(data==1)
....
       }
    });

Then you check what is the returned value.