how do i get response from php script called with form plugin?

how do i get response from php script called with form plugin?

$('#myForm')
    
.ajaxForm({
        target 
: 'myscript.php', // or whatever
        dataType 
: 'json',
        success 
: function (response) {
            this seems to be not the response from the myscript.php
 how do i get it to get the response from the php
 thanks



        }
    
})
;