woocommerce offtopic - How to get Wordpress to respond to a GET request at the end of a Woo product page

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I need to initiate an action on a WooCommerce product page if parameters are added to the end of the page. For example:

If this action is initiated, it will sync the product pricing via API from an external source (I know how to do that already) and reload the page.

What I don't know is how to make the plugin that will perform the sync respond to the GET request parameters.

I'm comfortable using the WordPress API if that's the best solution. I've created plugins before, I just haven't dealt with this situation.

Thanks!

I need to initiate an action on a WooCommerce product page if parameters are added to the end of the page. For example:

https://somesite/products/some-random-product?some-parameter=true

If this action is initiated, it will sync the product pricing via API from an external source (I know how to do that already) and reload the page.

What I don't know is how to make the plugin that will perform the sync respond to the GET request parameters.

I'm comfortable using the WordPress API if that's the best solution. I've created plugins before, I just haven't dealt with this situation.

Thanks!

• woocommerce-offtopic
• api

Share Improve this question asked Aug 18, 2019 at 21:53 DifsterDifster 10111 bronze badge

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1 Answer 1

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If you want to do the processing and reloading, more or less, user not noticing, you could execute a custom function on template_redirect action.

function check_parameter() {

  if ( isset( $_GET['bar'] ) && 'foo' === $_GET['bar'] && is_singular( 'product' ) ) {

    // get remote data e.g. with wp_remote_get( 'http://example' );

    // do something

    // redirect
    global $wp;
    wp_redirect( home_url( $wp->request ) ); // this should redirect to the same url without parameters
    die;

  }

}
add_action( 'template_redirect', 'check_parameter' );

If you want to show the user that something is happening, then you could use admin ajax (or wp rest api). Something like this,

PHP

add_action( 'wp_ajax_my_action', 'my_action_function' );
add_action( 'wp_ajax__nopriv_my_action', 'my_action_function' ); // for non logged in users, if needed

function my_action_function() {

  // check nonce

  // check for capabilities, if needed

  // check for required $_POST parameters / values

  // do something

  wp_send_json_error( $data );

  // or 

  wp_send_json_success( $data ); // $data could be the new price for example

}

jQuery (use js if you prefer)

jQuery.ajax({
  method: 'POST',
  url: 'admin-ajax.php', // use wp_localize_script for this
  data: {
    action: 'my_action',
    nonce: 'your-nonce-field-value', // use wp_localize_script for this
    bar: 'foo', // use js/jquery to get url parameter(s)
  },
  success: function(response){
    // do something with response.data
  },
});

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