PHP Var in Javascript from AJAX Load

Question

Hi I am trying to get a php var from another page via ajax into javascript and it alerts nothing

PHP on getposY

<?php include"connectdatabase.php";
$posYquery=mysql_query("Select posY FROM multiplayer WHERE game = '1'");
$posY = mysql_fetch_array($posYquery);
$posY2 = $posY['posY']; 
?>

Javascript

function phpmove(){ 
$("#div1").load("getposY.php");
};
setInterval("phpmove()", 1);
var move = function(){
    canvasContext.clearRect(posX, posY, sizew, sizeh);
    var posY = "<?php echo $posY2; ?>";
    alert(posY);
    canvasContext.drawImage(player, posX, posY, sizew, sizeh);
};
setInterval(move, 1);

I do have a div with an id of div1 Thanks in advance

Well, consider learning the difference between client and server side first. — idmean, Jan 12 '14 at 09:56
thats not how ajax works. your page is rendered first var posY = ""; is "" at this moment see http://stackoverflow.com/questions/15964734/store-ajax-result-in-jquery-variable — Roman Pickl, Jan 12 '14 at 09:59
possible duplicate of [PHP variable in JAVASCRIPT not working](http://stackoverflow.com/questions/21073130/php-variable-in-javascript-not-working) - Never ever duplicate your own questions. — hakre, Jan 12 '14 at 10:02

score 0 · Answer 1 · edited May 23 '17 at 12:13

thats not how ajax works. your page is rendered first var posY = ""; is "" at this moment

see Store ajax result in jQuery variable

so it should be more like (not tested):

your php file

<?php include"connectdatabase.php";
$posYquery=mysql_query("Select posY FROM multiplayer WHERE game = '1'");
$posY = mysql_fetch_array($posYquery);
echo $posY;
?>

your javascript file

var posY;
var move = function(){
    canvasContext.clearRect(posX, posY, sizew, sizeh);
    $.get("getposY.php", function (data) {
      posY=data;
    });
    alert(posY);
    canvasContext.drawImage(player, posX, posY, sizew, sizeh);
};
setInterval(move, 1);

PHP Var in Javascript from AJAX Load

1 Answers1