jquery - ajax error in wordpress plugin -

i'm writing plugin wordpress. plugin has widget contains button , textbox. button has onclick event. when event occurs need post textbox data php file using ajax ajax code doesn't return error, php doesn't data.

here's js file

 function f()     {         var x=document.getelementbyid('last').value;           jquery.ajax({             type: "post",             url: 'http://localhost/wordpress/wp-content/plugins/hovo/scripts/vote.php',                      data: x,             success: function() {                 alert('sends successfully');             },             error: function(jqxhr, textstatus, errorthrown) {             alert(errorthrown);             }         });     } 

here's php file

<?php     if(isset($_post["anun"]))     {         echo $_post['anun'];     }     else     {         echo "error";     } ?> 

please fix problem

in php $_post expecting key / value pair , sending value in ajax. 'anun' key , whatever stored in x value.

since not sending key 'anun' $_post cannot return value stored in x because if condition fails.

you should able correct changing ajax call slightly:

function f() {      var x = document.getelementbyid('last').value;      jquery.ajax({         type: "post",         url: 'http://localhost/wordpress/wp-content/plugins/hovo/scripts/vote.php',                  data: { anun: x },         success: function() {             alert('sends successfully');         },         error: function(jqxhr, textstatus, errorthrown) {         alert(errorthrown);         }     }); } 

to sure getting correct value of x, try using console.log(x); before ajax call , check browser console see returns.

if not return correct value or returns nothing, try changing:

var x = document.getelementbyid('last').value; 

to simply:

x = jquery('#last').val();