Source
File: wp-admin/includes/class-wp-privacy-policy-content.php
public static function text_change_check() {
$policy_page_id = (int) get_option( 'wp_page_for_privacy_policy' );
// The site doesn't have a privacy policy.
if ( empty( $policy_page_id ) ) {
return false;
}
if ( ! current_user_can( 'edit_post', $policy_page_id ) ) {
return false;
}
$old = (array) get_post_meta( $policy_page_id, '_wp_suggested_privacy_policy_content' );
// Updates are not relevant if the user has not reviewed any suggestions yet.
if ( empty( $old ) ) {
return false;
}
$cached = get_option( '_wp_suggested_policy_text_has_changed' );
/*
* When this function is called before `admin_init`, `self::$policy_content`
* has not been populated yet, so use the cached result from the last
* execution instead.
*/
if ( ! did_action( 'admin_init' ) ) {
return 'changed' === $cached;
}
$new = self::$policy_content;
// Remove the extra values added to the meta.
foreach ( $old as $key => $data ) {
if ( ! empty( $data['removed'] ) ) {
unset( $old[ $key ] );
continue;
}
$old[ $key ] = array(
'plugin_name' => $data['plugin_name'],
'policy_text' => $data['policy_text'],
);
}
// Normalize the order of texts, to facilitate comparison.
sort( $old );
sort( $new );
// The == operator (equal, not identical) was used intentionally.
// See http://php.net/manual/en/language.operators.array.php
if ( $new != $old ) {
// A plugin was activated or deactivated, or some policy text has changed.
// Show a notice on the relevant screens to inform the admin.
add_action( 'admin_notices', array( 'WP_Privacy_Policy_Content', 'policy_text_changed_notice' ) );
$state = 'changed';
} else {
$state = 'not-changed';
}
// Cache the result for use before `admin_init` (see above).
if ( $cached !== $state ) {
update_option( '_wp_suggested_policy_text_has_changed', $state );
}
return 'changed' === $state;
}