Question

I have a function with it i want to get value from a php file:

var phrases = null;
function setPhrases(lang) {
    $.getJSON(locationHostname()+'json?json=lang&lang='+lang,
            function(json) {
        phrases = json;
        alert( 1 + ' ' + phrases);//phrases = [object Object]
    });
    alert( 2 + ' ' + phrases);//phrases = null
}
setPhrases('en');
alert(3+' '+phrases);//phrases = null

how to set correctly it, that alert(3+’ ‘+phrases); gets an object instead of null? I want to use the function that e.g returns the value from getJSOn.

Thank you

Answer 1

$.getJSON is asynchronous , that’s why you get undefined: the alerts are executed while ajax call is still running

You could call a function on success event, passing the json as argument, e.g.

function setPhrases(lang) {
    $.getJSON(locationHostname()+'json?json=lang&lang='+lang,
        function(json) {
            continueProcessing(json)
        }
    );
}

function continueProcessing(obj) {
  ...
}