<?php
/**
* reCAPTCHA module main file
*
* @link https://contactform7.com/recaptcha/
*/
wpcf7_include_module_file( 'recaptcha/service.php' );
add_action( 'wpcf7_init', 'wpcf7_recaptcha_register_service', 15, 0 );
/**
* Registers the reCAPTCHA service.
*/
function wpcf7_recaptcha_register_service() {
$integration = WPCF7_Integration::get_instance();
$integration->add_service( 'recaptcha',
WPCF7_RECAPTCHA::get_instance()
);
}
add_action(
'wp_enqueue_scripts',
'wpcf7_recaptcha_enqueue_scripts',
20, 0
);
/**
* Enqueues frontend scripts for reCAPTCHA.
*/
function wpcf7_recaptcha_enqueue_scripts() {
$service = WPCF7_RECAPTCHA::get_instance();
if ( ! $service->is_active() ) {
return;
}
$url = 'https://www.google.com/recaptcha/api.js';
if ( apply_filters( 'wpcf7_use_recaptcha_net', false ) ) {
$url = 'https://www.recaptcha.net/recaptcha/api.js';
}
wp_enqueue_script( 'google-recaptcha',
add_query_arg(
array(
'render' => $service->get_sitekey(),
),
$url
),
array(),
'3.0',
true
);
$assets = array();
$asset_file = wpcf7_plugin_path( 'modules/recaptcha/index.asset.php' );
if ( file_exists( $asset_file ) ) {
$assets = include( $asset_file );
}
$assets = wp_parse_args( $assets, array(
'src' => wpcf7_plugin_url( 'modules/recaptcha/index.js' ),
'dependencies' => array(
'google-recaptcha',
'wp-polyfill',
),
'version' => WPCF7_VERSION,
'in_footer' => true,
) );
wp_register_script(
'wpcf7-recaptcha',
$assets['src'],
$assets['dependencies'],
$assets['version'],
$assets['in_footer']
);
wp_enqueue_script( 'wpcf7-recaptcha' );
wp_localize_script( 'wpcf7-recaptcha',
'wpcf7_recaptcha',
array(
'sitekey' => $service->get_sitekey(),
'actions' => apply_filters( 'wpcf7_recaptcha_actions', array(
'homepage' => 'homepage',
'contactform' => 'contactform',
) ),
)
);
}
add_filter(
'wpcf7_form_hidden_fields',
'wpcf7_recaptcha_add_hidden_fields',
100, 1
);
/**
* Adds hidden form field for reCAPTCHA.
*/
function wpcf7_recaptcha_add_hidden_fields( $fields ) {
$service = WPCF7_RECAPTCHA::get_instance();
if ( ! $service->is_active() ) {
return $fields;
}
return array_merge( $fields, array(
'_wpcf7_recaptcha_response' => '',
) );
}
add_filter( 'wpcf7_spam', 'wpcf7_recaptcha_verify_response', 9, 2 );
/**
* Verifies reCAPTCHA token on the server side.
*/
function wpcf7_recaptcha_verify_response( $spam, $submission ) {
if ( $spam ) {
return $spam;
}
$service = WPCF7_RECAPTCHA::get_instance();
if ( ! $service->is_active() ) {
return $spam;
}
$token = isset( $_POST['_wpcf7_recaptcha_response'] )
? trim( $_POST['_wpcf7_recaptcha_response'] ) : '';
if ( $service->verify( $token ) ) { // Human
$spam = false;
} else { // Bot
$spam = true;
if ( '' === $token ) {
$submission->add_spam_log( array(
'agent' => 'recaptcha',
'reason' => __(
'reCAPTCHA response token is empty.',
'contact-form-7'
),
) );
} else {
$submission->add_spam_log( array(
'agent' => 'recaptcha',
'reason' => sprintf(
__(
'reCAPTCHA score (%1$.2f) is lower than the threshold (%2$.2f).',
'contact-form-7'
),
$service->get_last_score(),
$service->get_threshold()
),
) );
}
}
return $spam;
}
add_action( 'wpcf7_init', 'wpcf7_recaptcha_add_form_tag_recaptcha', 10, 0 );
/**
* Registers form-tag types for reCAPTCHA.
*/
function wpcf7_recaptcha_add_form_tag_recaptcha() {
$service = WPCF7_RECAPTCHA::get_instance();
if ( ! $service->is_active() ) {
return;
}
wpcf7_add_form_tag( 'recaptcha',
'__return_empty_string', // no output
array( 'display-block' => true )
);
}
add_action( 'wpcf7_upgrade', 'wpcf7_upgrade_recaptcha_v2_v3', 10, 2 );
/**
* Adds warnings for users upgrading from reCAPTCHA v2 to v3.
*/
function wpcf7_upgrade_recaptcha_v2_v3( $new_ver, $old_ver ) {
if ( version_compare( '5.1-dev', $old_ver, '<=' ) ) {
return;
}
$service = WPCF7_RECAPTCHA::get_instance();
if ( ! $service->is_active() or $service->get_global_sitekey() ) {
return;
}
// Maybe v2 keys are used now. Warning necessary.
WPCF7::update_option( 'recaptcha_v2_v3_warning', true );
WPCF7::update_option( 'recaptcha', null );
}
add_action( 'wpcf7_admin_menu', 'wpcf7_admin_init_recaptcha_v2_v3', 10, 0 );
/**
* Adds filters and actions for warnings.
*/
function wpcf7_admin_init_recaptcha_v2_v3() {
if ( ! WPCF7::get_option( 'recaptcha_v2_v3_warning' ) ) {
return;
}
add_filter(
'wpcf7_admin_menu_change_notice',
'wpcf7_admin_menu_change_notice_recaptcha_v2_v3',
10, 1
);
add_action(
'wpcf7_admin_warnings',
'wpcf7_admin_warnings_recaptcha_v2_v3',
5, 3
);
}
/**
* Increments the admin menu counter for the Integration page.
*/
function wpcf7_admin_menu_change_notice_recaptcha_v2_v3( $counts ) {
$counts['wpcf7-integration'] += 1;
return $counts;
}
/**
* Prints warnings on the admin screen.
*/
function wpcf7_admin_warnings_recaptcha_v2_v3( $page, $action, $object ) {
if ( 'wpcf7-integration' !== $page ) {
return;
}
$message = sprintf(
esc_html( __(
"API keys for reCAPTCHA v3 are different from those for v2; keys for v2 don’t work with the v3 API. You need to register your sites again to get new keys for v3. For details, see %s.",
'contact-form-7'
) ),
wpcf7_link(
__( 'https://contactform7.com/recaptcha/', 'contact-form-7' ),
__( 'reCAPTCHA (v3)', 'contact-form-7' )
)
);
echo sprintf(
'<div class="notice notice-warning"><p>%s</p></div>',
$message
);
}