Question

How can I check if someuser types CTRL+S (control+s) in input textbox using php?

Checking that keyboard event, will it display the local characters or unicode characters like mathematical symbols?

How can I do it? Do I have to do it using javascript/jquery?

Suppose I have the mapping for unicode characters with some keyboad mapping, During submitting the data to server do I have to check the mapping of that typed character using PHP?

Think about commenting of a post in a blog.

Answer 1

Using JQuery (as pointed out above PHP is just for serving)

$(document).keypress("s",function(e) {
  if(e.ctrlKey)
    alert("do something");
});