How to convert integer from ip address using php? (ip2long)

$lower = "IP ADDRESS";
echo $lower_dec = (float)sprintf("%u",ip2long($lower));

Autocomplete JQuery script full source code example

<script src="http://www.jqueryautocomplete.com/js/jquery/jquery-1.7.1.min.js"></script>
<script src="http://www.jqueryautocomplete.com/js/jquery/jquery.ui.core.min.js"></script>
<script src="http://www.jqueryautocomplete.com/js/jquery/jquery.ui.widget.min.js"></script>
<script src="http://www.jqueryautocomplete.com/js/jquery/jquery.ui.position.min.js"></script>
<script src="http://www.jqueryautocomplete.com/js/jquery/jquery.ui.autocomplete.min.js"></script>
<link rel="stylesheet" href="http://www.jqueryautocomplete.com/js/jquery/smoothness/jquery-ui-1.8.16.custom.css"/>
<script>var data = [
  {"label" : "Aragorn"},
  {"label" : "Arwen"},
  {"label" : "Bilbo Baggins"},
  {"label" : "Boromir"},
  {"label" : "Frodo Baggins"},
  {"label" : "Gandalf"},
  {"label" : "Gimli"},
  {"label" : "Gollum"},
  {"label" : "Legolas"},
  {"label" : "Meriadoc Merry Brandybuck"},
  {"label" : "Peregrin Pippin Took"},
  {"label" : "Samwise Gamgee"}
  ];
</script>
<script>
$(function() {

 $( "#search" ).autocomplete(
 {
   source:data
 })
});
</script>

<input type="text" id="search" />

Enter Floating Number only

Input field onkeyup check floating values only to allow
onkeyup="if (!isFinite(this.value)) this.value = this.value.replace(/(\s+)?.$/,'')"