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 <?php echo $_GET["v"];?> this to any javascript variable. var v=<?php echo $_GET["v"];?> ; — user2801382
– user2801382, Commented Dec 7, 2013 at 5:28

GautamD31 · Accepted Answer · 2013-12-07 05:44:39Z

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 7, 2013 at 5:44

answered Dec 7, 2013 at 5:27

GautamD31

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4 Comments

Marc Ster Over a year ago

I´ve tried this before many times.. it did not change something

Marc Ster Over a year ago

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?

GautamD31 Over a year ago

Oh ok I got it.See now

Marc Ster Over a year ago

Ok the fiddle helped, i mixed it with "document.URL" to get the url.. thank you!

Community · Accepted Answer · 2017-05-23 12:13:06Z

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, 2017 at 12:13

CommunityBot

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answered Dec 7, 2013 at 5:29

Krish R

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2 Comments

Marc Ster Over a year ago

Do i need to modify the .htaccess for that?

Krish R Over a year ago

No need for changing htaccess

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