Add multiple value to a query variable in WordPress

Question

I am using the below code in functions.php to add custom query variables to my WordPress project.

<?php
function add_custom_query_var( $vars ){
  $vars[] = "brand";
  return $vars;
}
add_filter( 'query_vars', 'add_custom_query_var' );
?>

And then on the content page I am using:

<?php echo $currentbrand = get_query_var('brand'); ?>

So now I can pass a URL like:

http://myexamplesite.com/store/?brand=nike

and get nike in result.

How can I pass multiple values for a brand. So I would like to have 3 values for brand say, nike, adidas and woodland.

I have tried the following and none of them works:

http://myexamplesite.com/store/?brand=nike&brand=adidas&brand=woodland It just returns the last brand, in this case woodland.
http://myexamplesite.com/store/?brand=nike+adidas+woodland This returns all three with spaces. I kind of think this is not the correct solution. So may be there is a correct way to pass multiple values for a query variable and retrieve them in an array may be so that a loop can be run.

Felix · Accepted Answer · 2020-11-17 06:16:35Z

3

Usually you would pass the parameter like ?brand[]=unresponsibleCompany1&brand[]=otherBrandThatDoesNotCareMuch&brand[]=bunchOfCriminals .

In your WordPress PHP code, then get_query_var( 'brand' ) will return you an Array.

Everything else sounds like a relatively cheap but costy workaround.

edited Nov 17, 2020 at 6:16

answered Mar 6, 2020 at 13:37

Felix

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Comments

Оzgur · Accepted Answer · 2017-04-11 08:29:24Z

1

You will need to pass query parameters in this way;

brand1=nike&brand2=adidas&brand3=woodland

So, different key for each brand

On the page, recieving values

$params = $_GET;
$brands = array();
foreach($params as $k=>$v) {
    if(substr($k,0,5)=="brand") {
        $brands[] = $v;
    }
}

Alternatively

Using your 2nd method http://myexamplesite.com/store/?brand=nike+adidas+woodland

$brands = explode(" ", $_GET['brand']);

Alternative method looks easier 🙂

edited Apr 11, 2017 at 8:29

answered Apr 11, 2017 at 8:16

Оzgur

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3 Comments

Kiran Dash Over a year ago

Thanks. Different key will work. But I would like to know if it is possible with just a single key.

Оzgur Over a year ago

@KiranDash updated the answer, I guess alternative method is what you looking for

Kiran Dash Over a year ago

I guess I will go with this. But what I was really looking for here was if WordPress has a built in solution for this. Which I guess does not exist

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