从ajax调用返回值

Question

I'm trying to get the return bool from the ajax call, but when I run the function and save to a variable but the only thing i get is undefined.

function check(number, id){
    $.ajax({
        url: 'ai.php',
        data: {
            "func":"checkNumber",
            "id":id,
            "number":number
        },
        method: 'GET',
        dataType: 'json'
    }).done(function(jData) {
        return jData['idFound'];
    }).fail(function(jData) {
        console.log(jData['idFound']);
    });
}

var test = check(44444, 12);
console.log(test);
// true

// but i get an undefined value in the console.log

Answer 1

Depend ur file 'ai.php' is a format json? please check validate http://www.jsonlint.com

Confuse ur code data, its just 'post' and not 'get'.

You can try getjson or ajax, look a exemple:

$(document).ready(function() {

    $.getJSON('http://beta.json-generator.com/api/json/get/NkmG8_zBZ', function(json) {
        for (x=0; x<json.length; x++) {
          console.log('getjson>'+json[x].nome);
        }
    });

    $.ajax({
        type: 'get',
        url: 'http://beta.json-generator.com/api/json/get/NkmG8_zBZ',
        dataType : 'json',
        success: function(json) {
          for (x=0; x<json.length; x++) {
            console.log('ajax>'+json[x].cidade);
          }
        },
        error: function(err) {
            console.log(err);
        }
    });
  
  });

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>

</div>