javascript - checking returned data from PHP script through jquery -

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i have written php script

cch.php

$stmtcheck = $mysqli->prepare("select id members email=? , unlock_code=?"); $stmtcheck->bind_param("si", $_session['unlockemail'], $_post['code']); $stmtcheck->execute(); $stmtcheck->bind_result($id); $stmtcheck->fetch(); $stmtcheck->close();

and jquery submitting form is

recover.php

$("#formunlock").submit(function(e) {    e.preventdefault();     $.ajax(    {         url: '../scripts/cch.php',         method: 'post',         data: $(#formunlock).serialize(),         success: function()         {         alert("unlocked");         }    });  });

now want check whether $id has value or not! how fetch $id variable main script?

in cch.php, if want pass id javascript, can print id

echo $id;

what ever data received on ajax response passed parameter success callback function. either have execute success actions inside succes call or have write function executed on ajax success , call function , pass params

$("#formunlock").submit(function(e) {    e.preventdefault();     $.ajax(    {         url: '../scripts/cch.php',         method: 'post',         data: $(#formunlock).serialize(),         success: function(responsedata)         {             if (responsedata == '' )             {                  alert("sorry failed");             }             else             {                 alert("success");             }         }    });  });

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