get value of a php variable set by url in javascript

Question

Hey i defined a php variable like this inside the body tag:

<?php $v=null;?>

Now i am using this code to check if the variable is set through the url

if ("<?php echo $_GET["v"];?>;"  == null) {
          // Do something because the variable is set through the url

    }
 else {
         // Do something else because the variable is not set through the url    
    }

I am using an url like this: www.example.com/index.php?v=12345

When i run this code by opening the index with this url it says v is undefined.. When i run this code by opening the index with "www.example.com/index.php" it is undefined as well.. but not 'null'

What is the problem here? Thank you

assign this to any javascript variable. var v= ; – Dec 07 '13 at 05:28 — , Dec 07 '13 at 05:28

GautamD31 · Accepted Answer · 2013-12-07T05:44:39.273

1

Try like

var my_var_arr = location.search.replace('?', '').split('=');
if (my_var_arr[1]  == null) {
      // Do something because the variable is set through the url

}
else {
     // Do something else because the variable is not set through the url    
}

Try this FIDDLE

edited Dec 07 '13 at 05:44

answered Dec 07 '13 at 05:27

GautamD31

28,552
10
64
85

I´ve tried this before many times.. it did not change something – Marc Ster Dec 07 '13 at 05:31
works if nothing is set through the url, but if the url is like www.example.com/index.php?v=1234 is returns ?v,1234 ... i want just to return 1234 .. how can i do that? – Marc Ster Dec 07 '13 at 05:43
Oh ok I got it.See now – GautamD31 Dec 07 '13 at 05:45
Ok the fiddle helped, i mixed it with "document.URL" to get the url.. thank you! – Marc Ster Dec 07 '13 at 05:54

score 1 · Answer 2 · edited May 23 '17 at 12:13

1

You can use javascript to get the query string parameter instead of php. There is lot of tutorials around here.

Ref: http://javascriptproductivity.blogspot.in/2013/02/get-url-variables-with-javascript.html

Possible solution: jquery get querystring from URL

edited May 23 '17 at 12:13

Community

1
1

answered Dec 07 '13 at 05:29

Krish R

22,583
7
50
59

Do i need to modify the .htaccess for that? – Marc Ster Dec 07 '13 at 05:30
No need for changing htaccess – Krish R Dec 07 '13 at 05:31

get value of a php variable set by url in javascript

2 Answers2