use query string in URL to display content on the page

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I'd like to say something on my page based on what page the person got there from. I can set up the link to that page to be:

www.example/page?parameter=myparameter

Is there a way I can access that parameter so that I can have it show on the page, somewhere in my content?

I'd like to say something on my page based on what page the person got there from. I can set up the link to that page to be:

www.example/page?parameter=myparameter

Is there a way I can access that parameter so that I can have it show on the page, somewhere in my content?

• urls
• content
• parameter
• query-string

Share Improve this question edited Nov 9, 2016 at 19:02 Ethan Rævan 4,02955 gold badges2727 silver badges5555 bronze badges asked Aug 23, 2013 at 15:35 user3515user3515 14111 gold badge22 silver badges1010 bronze badges 2

• 1 Sorry I understand that the answers are examples, but I find it important to note that they should not be used as-is. User input (like query string parameters) should never be echoed unsanitized to prevent XSS attacks! All answers so far are vulnerable to XSS and should at least include a warning. – kubi Commented Aug 14, 2019 at 8:43
• For a SAFE way to implement this, use this plugin - or browse the code of the plugin on github. – 1NN Commented Oct 12, 2022 at 10:15

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3 Answers 3

Sorted by: Reset to default 6

Per the OP's answer within their question:

With your help and some Googling, I put together a shortcode that returns the value of any url parameter. Here it is:

//THIS IS A CUSTOM SHORTCODE TO DISPLAY A PARAMETER FROM THE URL
function URLParam( $atts ) {  
    extract( shortcode_atts( array(
        'param' => 'param',
    ), $atts ) );
    return $_GET[$param];  
}
add_shortcode('URLParam', 'URLParam'); 

I use the shortcode like this to get the trip_type from my URL:

[URLParam param='trip_type']

You could use a PHP session, look in the query object for the request, or use $_GET with your url, but it's not for sensitive information...

Something like this;

Grab the trip name from the URL

$tripname = $_GET['tripname'];

Use it in your heading;

if(isset($tripname)) echo '<h1>Plan Your Trip To ' .$tripname. '</h1>';

Here's another great way to accomplish this. This won't require shortcodes and will automatically update each page you create where there parameter "trip" is present!

1) Navigate to your theme folder and open functions.php (or create it if it's missing)

2) Add the following code and save:

<?php 
    add_filter( 'the_content', 'my_trip_filter' );

    function my_trip_filter( $content ) {
        if ( isset($_REQUEST['trip']) && is_single() ) {
            $content = "<h1>Fill out this form to register for the " . $_REQUEST['trip'] . " trip</h1>" . $content;
        }

        return $content;

    }
?>

This code uses the_content filter to override each time you use the function the_content() function to print your blog information. It detects whether or not the page requested is a single page/post and not the archive. Additional logic or overrides can be added to it. Just make sure you return $content and whatever message you desire will be returned to the screen.

Enjoy!

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