Question

I have a javascript functions that fetches some JSON from a PHP. When I get the JSON my plan is to parse it and load it in to an array and then return that array so that I can use the data anywhere.

This is the ajax function:

function get_ajax(route_val){

$.ajax({
            url: "ajax.php",
            dataType: 'json',
            data: { 
                route: route_val
        },
            success: function(result) {
                if(result.error == true){
                    alert(result.message);
                }else{

                    $.each(result, function(key1, value1){

                        //console.log(key1 + ":" + value1);

                        returnarray[key1] = value1;

                    });             

                    return returnarray;
                }

            }
        });


}
</script>

If I then try to define say var arr = get_ajax(‘1’), arr is going to be empty. I can alert and console.log stuff from the array from inside the function but returning it returns nothing.

It does not seem to exist outside of the function.

Any ideas?

Answer 1

You are using Ajax incorrectly, the idea is not to have it return anything, but instead hand off the data to something called a callback function, which handles the data.

IE:

function handleData( responseData ) {
    // do what you want with the data
    console.log(responseData);
}

$.ajax({
    url: "hi.php",
    ...
    success: function ( data, status, XHR ) {
        handleData(data);
    }
});

returning anything in the submit handler will not do anything, you must instead either hand off the data, or do what you want with it directly inside the success function.