Question

-Issue Still Unresolved-

I’m trying to call a database, put all the rows of a table in an array, pass that table to my JS as json data, and then use that data as parameters for a function.

When I run the script nothing happens. I don’t get any errors in the console, the rest of the script loads normally. I’m pretty new to mySQL and PHP, what am I doing wrong here? I suspect that I goofed up the php somehow.

• XAMPP server, being tested on my desktop
• all linked files are in the same directory
• There are no visible errors displayed anywhere. As far as I can tell, the script doesn’t even try to load the PHP to begin with, but also doesn’t display an error in firebug’s console

Attempted:

• Renaming the table without spaces
• placing the for loop inside the callback function
• amending php errors

Here’s the updated JS I’m using:

    this.taskMenu = function()
    {
        var table = [];
        $.getJSON("taskMaster.php", {"table" : "firstlist"},
            function(data)
            {
                table.push(data);

                for(i=0; i<table.length; i++)
                {
                    var taskId = table[i].taskName.replace(/\s+/g,"") + i;
                    formatTask("interface",taskId,table[i].taskName,table[i].taskDescription,table[i].taskComplete);
                }

            });
     }

and here’s the updated PHP:

error_reporting(E_ALL); ini_set('display_errors','On');
$con = mysql_connect("localhost", "root", "m3648y73");
if (!$con){die('Could not connect: ' . mysql_error());};
mysql_select_db("tasklistdb", $con);

$table = $_GET['table'];

$sql = mysql_query("SELECT taskName, taskId, taskDescription, taskComplete FROM `".$table."`");
$listTasks = array();

while ($row_user = mysql_fetch_assoc($sql))
    $listTasks[] = $row_user;

echo json_encode($listTasks);

mysql_close($con);

Am I linking to the DB correctly?

Answer 1

getJSON is asynchronous call. So before it could fetch values from PHP and execute the callback function, it moves to the for loop and here table is empty.

Solution: shift your for loop inside the callback function