没有从php中的ajax请求收到响应

Question

I have a page where there is table and each row has a icon for detailed information. When the icon is clicked, I get the unique identifier for that row into datastring and send a AJAX request. I get a response but cannot catch the correct response. Why is that I am doing wrong? I need to access the $desc in home.php , how to catch that in response ?

home.php

$.ajax({
        type: "POST",
        url: "actionone.php",
        data: dataString,
        cache: true,  
        success:function() {
        alert("success"); 
    }
});

actionone.php

if(isset($_POST['content']))
{
$content=(int)$_POST['content'];
$fetch = mysql_query("SELECT ISSUEDESCRIPTION FROM issues WHERE KBID =$content");
while($rowe = mysql_fetch_array($fetch))    
{   
    $desc = $rowe['ISSUEDESCRIPTION'];
} 

Answer 1

For ajax success work you output some from php code ie Change php code to

if(isset($_POST['content']))
{
    $content=(int)$_POST['content'];
    $fetch = mysql_query("SELECT ISSUEDESCRIPTION FROM issues WHERE KBID =$content");
    while($rowe = mysql_fetch_array($fetch))    
    {   
         $desc = $rowe['ISSUEDESCRIPTION'];
    }
    echo $desc;
}

JQUERY

$.ajax({
        type: "POST",
        url: "actionone.php",
        data: dataString,
        cache: true,  
        success:function(data) {
        alert(data.trim()); 
    }
});