AJAX and PHP

Server-Side Techniques with PHP and MySQL
}
}
{
}
// display status message
alert("There was a problem retrieving the data:\n" +
xmlHttp.statusText);
// handles the response received from the server
function handleServerResponse()
{
// retrieve the server's response
var response = xmlHttp.responseText;
// if the response is longer than 3 characters, or if it is void, we
// assume we just received a server-side error report
if(response.length > 3 || response.length == 0)
throw(response.length == 0 ? "Server error" : response);
// obtain a reference to the element on the page
myDiv = document.getElementById("myDivElement");
// display the HTML output
myDiv.innerHTML = "Server says: " + response + "";
}
4. Build the hero proxy PHP script, proxyping.php:
5. Finally, add the error-handler function. Yes, it's a bit more to type, but it does good
things to your solution (you can copy and paste it from other examples, because it
is not going to change). Create a new file named error_handler.php, and write
this code: