jQuery Ajax to grab specific PHP variable -

what i'm trying create dashboard jquery ajax calls php page populate fields on dashboard. i've done lots of ajax jquery in past i'm struggling head around problem.

my desired html:

<div id="phase1">  </div> <div id="phase2">  </div> <div id="phase3">  </div> 

in php page have 3 variables - $phase1, $phase2 , $phase3. i'd imagine using setinterval keep "live" populate 3 divs respective php variables. bit i'm scratching head how tell php page i'd grab variable $phase1 , distinguish between 3 variables fill right divs. php page called db.php!

can think how construct such ajax call...

in ajax calls set $_get parameter , in php if/elseif/else on it:

$.get("db.php?phase=1", function(data){ alert("data loaded: " + data); }); $.get("db.php?phase=2", function(data){ alert("data loaded: " + data); }); $.get("db.php?phase=3", function(data){ alert("data loaded: " + data); }); 

php:

switch($_get['phase']) { case '1': //do code , echo break; case'2': //do code , echo break case '3': //do code , echo break; }