Question

I need to know either my PHP script could delete some data from data base, or couldn’t.
For example I have JS function public void removeNumber(); How i can to know that data was removed correctly? May be i must to return from server some String that indicates success or failure attempting to remove data from db? public String removeNumber(); What is best practices? I know that better to throw exception, but in this case client and server both must know about Exception class (class mapping).
P.S.
I use ajax.

Answer 1

Using ajax would be an easier & better solution. And using jquery ajax would be easier, like.

$.ajax({
 type: "POST",
 url: "your_php_page_url",
 data: {}, //pass parameter as you need
 success: function(response) {
   //its the response from php page indicating db deletion was successful or not
   // like "deleted" or "failed"
 } 
});

//and in php you could do
if($yourDbRowDeleted)  {
  echo "deleted";
}
else {
  echo "failed";
}
exit;

Hope it helps