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Merged
swashata merged 5 commits into from
Nov 10, 2025
Merged

Feature/daniele/checkout custom parameters #819

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f786566
Added checkout customization parameters
DanieleFreemius Aug 22, 2025
f97701f
Flat checkout properties
DanieleFreemius Aug 25, 2025
c96efc6
feat(checkout): allow customizing checkout query params via filter
DanieleFreemius Oct 22, 2025
bc8f28f
Add allowlist for checkout query parameters in FS_Checkout_Manager
DanieleFreemius Nov 6, 2025
7c6d825
Changed filter name to checkout/parameters, code clean and small fixes
DanieleFreemius Nov 10, 2025
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40 changes: 37 additions & 3 deletions includes/managers/class-fs-checkout-manager.php
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Original file line number Diff line number Diff line change
Expand Up @@ -12,7 +12,36 @@

class FS_Checkout_Manager {

# region Singleton
/**
* Allowlist of query parameters for checkout.
*/
private $_allowed_custom_params = array(
// currency
'currency' => true,
'default_currency' => true,
// cart
'always_show_renewals_amount' => true,
'annual_discount' => true,
'billing_cycle' => true,
'billing_cycle_selector' => true,
'bundle_discount' => true,
'maximize_discounts' => true,
'multisite_discount' => true,
'show_inline_currency_selector' => true,
'show_monthly' => true,
// appearance
'form_position' => true,
'is_bundle_collapsed' => true,
'layout' => true,
'refund_policy_position' => true,
'show_refund_badge' => true,
'show_reviews' => true,
'show_upsells' => true,
'title' => true,
);


# region Singleton

/**
* @var FS_Checkout_Manager
Expand Down Expand Up @@ -153,7 +182,12 @@ public function get_query_params( Freemius $fs, $plugin_id, $plan_id, $licenses
( $fs->is_theme() && current_user_can( 'install_themes' ) )
);

return array_merge( $context_params, $_GET, array(
$filtered_params = $fs->apply_filters('checkout/parameters', $context_params);

// Allowlist only allowed query params.
$filtered_params = array_intersect_key($filtered_params, $this->_allowed_custom_params);

return array_merge( $context_params, $filtered_params, $_GET, array(
// Current plugin version.
'plugin_version' => $fs->get_plugin_version(),
'sdk_version' => WP_FS__SDK_VERSION,
Expand Down Expand Up @@ -239,4 +273,4 @@ public function get_pending_activation_url( Freemius $fs, $plugin_id ) {
private function get_checkout_redirect_nonce_action( Freemius $fs ) {
return $fs->get_unique_affix() . '_checkout_redirect';
}
}
}
3 changes: 2 additions & 1 deletion start.php
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Original file line number Diff line number Diff line change
Expand Up @@ -15,7 +15,7 @@
*
* @var string
*/
$this_sdk_version = '2.12.2.3';
$this_sdk_version = '2.12.2.4';

#region SDK Selection Logic --------------------------------------------------------------------

Expand Down Expand Up @@ -446,6 +446,7 @@ function_exists( 'wp_is_json_request' ) &&
* fs_plugin_icon_{plugin_slug}
* fs_show_trial_{plugin_slug}
* fs_is_pricing_page_visible_{plugin_slug}
* fs_checkout/parameters_{plugin_slug}
*
* --------------------------------------------------------
*
Expand Down