check if $_GET data is thrown into page on document load

Question

How do I know if a $_GET variable has been thrown in my page using jQuery? My $_GET variable is:

?ok=ok

I need to detect if the $_GET['ok'] is set using jQuery but I don't know how.

If you have PHP just check with `isset($_GET['ok'])` instead of trying to get url and use a regex to check if it is set/get value with javascript. — Class, Jan 28 '14 at 02:18
Do you mean that you want to check whether it's present in the URL? Or whether it's been interpreted by PHP? — TRiG, Jan 28 '14 at 02:18
@TRiG I want to check if it's present in the url, so I could call a jquery function if it's there. — marchemike, Jan 28 '14 at 02:19
So your question has nothing to do with PHP or $_GET. I suggest rewriting and retagging to clarify that. — TRiG, Jan 28 '14 at 02:20
Do you understand what $_GET is? It's a language construct in PHP: a superglobal variable. It's an automatically generated representation of the query string. What you're interested in in javascript is *the query string itself*, not whatever your server-side language has done with it. — TRiG, Jan 28 '14 at 02:24
(Aside: The constant stream of PHP/javascript questions asked by people who have no understanding of the difference between server-side and client-side code is really beginning to bug me.) — TRiG, Jan 28 '14 at 02:26

Anonymous · Accepted Answer · 2015-06-30T11:12:00.193

5

You could just check using PHP if $_GET['ok'] is set, then echo that into a JavaScript variable:

var ok = <?php echo intval(isset($_GET['ok'])) ?>

edited Jun 30 '15 at 11:12

answered Jan 28 '14 at 02:21

Anonymous

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score 2 · Answer 2 · edited May 23 '17 at 10:26

You can use the following which was taken from How to get the value from URL Parameter?

var QueryString = function () {
  // This function is anonymous, is executed immediately and 
  // the return value is assigned to QueryString!
  var query_string = {};
  var query = window.location.search.substring(1);
  var vars = query.split("&");
  for (var i=0;i<vars.length;i++) {
    var pair = vars[i].split("=");
    // If first entry with this name
    if (typeof query_string[pair[0]] === "undefined") {
      query_string[pair[0]] = pair[1];
      // If second entry with this name
    } else if (typeof query_string[pair[0]] === "string") {
      var arr = [ query_string[pair[0]], pair[1] ];
      query_string[pair[0]] = arr;
        // If third or later entry with this name
    } else {
      query_string[pair[0]].push(pair[1]);
    }
  } 
  return query_string;
} ();

then you can check if $_GET['ok'] is present in url with:

if(query_string.ok !== undefined){
    //$_GET['ok'] is in url
}

check if $_GET data is thrown into page on document load

2 Answers2