我正在尝试在PHP JQUERY中回调字符串

Question

I am trying to call back the value of content_columns to jquery.

PHP CODE:

if($act=="getcol"){
$pid=$_GET['pid'];
$domain_id = 1;
$PAGEresult = mysql_query("SELECT * FROM pages WHERE domain_id='$domain_id' AND id='$pid' ORDER BY id DESC");
$PAGErow = mysql_fetch_array($PAGEresult);
echo json_encode($PAGErow['content_columns']); 
}

jQuery

$.get("get_actions.php?act=getcol&pid="+pid, function(data){
   alert(data);
 });

Can someone lead me down the right path please.

Answer 1

If by "same string" it is possible that it is cached. You can disable caching with jQuery's ajax library that you are using. You can also send a different query string such as with the system time to ensure you don't get a cached results. You can also use POST.

You will only ever get one result from that query. If you want multiple results, you need to iterate over mysql_fetch(). If you only want one result, add LIMIT 1 to your query. Otherwise it is incredibly wasteful. Finally, why use SELECT *? Use SELECT content_columns ..