type && ! class_exists( 'ReallySimpleCaptcha' ) ) { return '' . __( 'To use CAPTCHA, you need Really Simple CAPTCHA plugin installed.', 'contact-form-7' ) . ''; } if ( empty( $tag->name ) ) { return ''; } $validation_error = wpcf7_get_validation_error( $tag->name ); $class = wpcf7_form_controls_class( $tag->type ); if ( 'captchac' == $tag->type ) { // CAPTCHA-Challenge (image) $class .= ' wpcf7-captcha-' . $tag->name; $atts = array(); $atts['class'] = $tag->get_class_option( $class ); $atts['id'] = $tag->get_id_option(); $op = array( // Default 'img_size' => array( 72, 24 ), 'base' => array( 6, 18 ), 'font_size' => 14, 'font_char_width' => 15 ); $op = array_merge( $op, wpcf7_captchac_options( $tag->options ) ); if ( ! $filename = wpcf7_generate_captcha( $op ) ) { return ''; } if ( ! empty( $op['img_size'] ) ) { if ( isset( $op['img_size'][0] ) ) { $atts['width'] = $op['img_size'][0]; } if ( isset( $op['img_size'][1] ) ) { $atts['height'] = $op['img_size'][1]; } } $atts['alt'] = 'captcha'; $atts['src'] = wpcf7_captcha_url( $filename ); $atts = wpcf7_format_atts( $atts ); $prefix = substr( $filename, 0, strrpos( $filename, '.' ) ); $html = sprintf( '', $tag->name, $prefix, $atts ); return $html; } elseif ( 'captchar' == $tag->type ) { // CAPTCHA-Response (input) if ( $validation_error ) { $class .= ' wpcf7-not-valid'; } $atts = array(); $atts['size'] = $tag->get_size_option( '40' ); $atts['maxlength'] = $tag->get_maxlength_option(); $atts['minlength'] = $tag->get_minlength_option(); if ( $atts['maxlength'] && $atts['minlength'] && $atts['maxlength'] < $atts['minlength'] ) { unset( $atts['maxlength'], $atts['minlength'] ); } $atts['class'] = $tag->get_class_option( $class ); $atts['id'] = $tag->get_id_option(); $atts['tabindex'] = $tag->get_option( 'tabindex', 'int', true ); $atts['autocomplete'] = 'off'; $atts['aria-invalid'] = $validation_error ? 'true' : 'false'; $value = (string) reset( $tag->values ); if ( wpcf7_is_posted() ) { $value = ''; } if ( $tag->has_option( 'placeholder' ) || $tag->has_option( 'watermark' ) ) { $atts['placeholder'] = $value; $value = ''; } $atts['value'] = $value; $atts['type'] = 'text'; $atts['name'] = $tag->name; $atts = wpcf7_format_atts( $atts ); $html = sprintf( '%3$s', sanitize_html_class( $tag->name ), $atts, $validation_error ); return $html; } } /* Validation filter */ add_filter( 'wpcf7_validate_captchar', 'wpcf7_captcha_validation_filter', 10, 2 ); function wpcf7_captcha_validation_filter( $result, $tag ) { $tag = new WPCF7_FormTag( $tag ); $type = $tag->type; $name = $tag->name; $captchac = '_wpcf7_captcha_challenge_' . $name; $prefix = isset( $_POST[$captchac] ) ? (string) $_POST[$captchac] : ''; $response = isset( $_POST[$name] ) ? (string) $_POST[$name] : ''; $response = wpcf7_canonicalize( $response ); if ( 0 == strlen( $prefix ) || ! wpcf7_check_captcha( $prefix, $response ) ) { $result->invalidate( $tag, wpcf7_get_message( 'captcha_not_match' ) ); } if ( 0 != strlen( $prefix ) ) { wpcf7_remove_captcha( $prefix ); } return $result; } /* Ajax echo filter */ add_filter( 'wpcf7_ajax_onload', 'wpcf7_captcha_ajax_refill' ); add_filter( 'wpcf7_ajax_json_echo', 'wpcf7_captcha_ajax_refill' ); function wpcf7_captcha_ajax_refill( $items ) { if ( ! is_array( $items ) ) return $items; $fes = wpcf7_scan_form_tags( array( 'type' => 'captchac' ) ); if ( empty( $fes ) ) return $items; $refill = array(); foreach ( $fes as $fe ) { $name = $fe['name']; $options = $fe['options']; if ( empty( $name ) ) continue; $op = wpcf7_captchac_options( $options ); if ( $filename = wpcf7_generate_captcha( $op ) ) { $captcha_url = wpcf7_captcha_url( $filename ); $refill[$name] = $captcha_url; } } if ( ! empty( $refill ) ) $items['captcha'] = $refill; return $items; } /* Messages */ add_filter( 'wpcf7_messages', 'wpcf7_captcha_messages' ); function wpcf7_captcha_messages( $messages ) { return array_merge( $messages, array( 'captcha_not_match' => array( 'description' => __( "The code that sender entered does not match the CAPTCHA", 'contact-form-7' ), 'default' => __( 'Your entered code is incorrect.', 'contact-form-7' ) ) ) ); } /* Tag generator */ add_action( 'wpcf7_admin_init', 'wpcf7_add_tag_generator_captcha', 46 ); function wpcf7_add_tag_generator_captcha() { if ( ! wpcf7_use_really_simple_captcha() ) { return; } $tag_generator = WPCF7_TagGenerator::get_instance(); $tag_generator->add( 'captcha', __( 'CAPTCHA (Really Simple CAPTCHA)', 'contact-form-7' ), 'wpcf7_tag_generator_captcha' ); } function wpcf7_tag_generator_captcha( $contact_form, $args = '' ) { $args = wp_parse_args( $args, array() ); if ( ! class_exists( 'ReallySimpleCaptcha' ) ) { ?>
scan_form_tags( array( 'type' => array( 'captchac' ) ) ); if ( ! $has_tags ) { return; } if ( ! class_exists( 'ReallySimpleCaptcha' ) ) { return; } $uploads_dir = wpcf7_captcha_tmp_dir(); wpcf7_init_captcha(); if ( ! is_dir( $uploads_dir ) || ! wp_is_writable( $uploads_dir ) ) { $message = sprintf( __( 'This contact form contains CAPTCHA fields, but the temporary folder for the files (%s) does not exist or is not writable. You can create the folder or change its permission manually.', 'contact-form-7' ), $uploads_dir ); echo '

' . esc_html( $message ) . '

'; } if ( ! function_exists( 'imagecreatetruecolor' ) || ! function_exists( 'imagettftext' ) ) { $message = __( 'This contact form contains CAPTCHA fields, but the necessary libraries (GD and FreeType) are not available on your server.', 'contact-form-7' ); echo '

' . esc_html( $message ) . '

'; } } /* CAPTCHA functions */ function wpcf7_init_captcha() { static $captcha = null; if ( $captcha ) { return $captcha; } if ( class_exists( 'ReallySimpleCaptcha' ) ) { $captcha = new ReallySimpleCaptcha(); } else { return false; } $dir = trailingslashit( wpcf7_captcha_tmp_dir() ); $captcha->tmp_dir = $dir; if ( is_callable( array( $captcha, 'make_tmp_dir' ) ) ) { $result = $captcha->make_tmp_dir(); if ( ! $result ) { return false; } return $captcha; } if ( wp_mkdir_p( $dir ) ) { $htaccess_file = $dir . '.htaccess'; if ( file_exists( $htaccess_file ) ) { return $captcha; } if ( $handle = @fopen( $htaccess_file, 'w' ) ) { fwrite( $handle, 'Order deny,allow' . "\n" ); fwrite( $handle, 'Deny from all' . "\n" ); fwrite( $handle, '' . "\n" ); fwrite( $handle, ' Allow from all' . "\n" ); fwrite( $handle, '' . "\n" ); fclose( $handle ); } } else { return false; } return $captcha; } function wpcf7_captcha_tmp_dir() { if ( defined( 'WPCF7_CAPTCHA_TMP_DIR' ) ) return WPCF7_CAPTCHA_TMP_DIR; else return wpcf7_upload_dir( 'dir' ) . '/wpcf7_captcha'; } function wpcf7_captcha_tmp_url() { if ( defined( 'WPCF7_CAPTCHA_TMP_URL' ) ) return WPCF7_CAPTCHA_TMP_URL; else return wpcf7_upload_dir( 'url' ) . '/wpcf7_captcha'; } function wpcf7_captcha_url( $filename ) { $url = trailingslashit( wpcf7_captcha_tmp_url() ) . $filename; if ( is_ssl() && 'http:' == substr( $url, 0, 5 ) ) { $url = 'https:' . substr( $url, 5 ); } return apply_filters( 'wpcf7_captcha_url', esc_url_raw( $url ) ); } function wpcf7_generate_captcha( $options = null ) { if ( ! $captcha = wpcf7_init_captcha() ) { return false; } if ( ! is_dir( $captcha->tmp_dir ) || ! wp_is_writable( $captcha->tmp_dir ) ) return false; $img_type = imagetypes(); if ( $img_type & IMG_PNG ) $captcha->img_type = 'png'; elseif ( $img_type & IMG_GIF ) $captcha->img_type = 'gif'; elseif ( $img_type & IMG_JPG ) $captcha->img_type = 'jpeg'; else return false; if ( is_array( $options ) ) { if ( isset( $options['img_size'] ) ) $captcha->img_size = $options['img_size']; if ( isset( $options['base'] ) ) $captcha->base = $options['base']; if ( isset( $options['font_size'] ) ) $captcha->font_size = $options['font_size']; if ( isset( $options['font_char_width'] ) ) $captcha->font_char_width = $options['font_char_width']; if ( isset( $options['fg'] ) ) $captcha->fg = $options['fg']; if ( isset( $options['bg'] ) ) $captcha->bg = $options['bg']; } $prefix = wp_rand(); $captcha_word = $captcha->generate_random_word(); return $captcha->generate_image( $prefix, $captcha_word ); } function wpcf7_check_captcha( $prefix, $response ) { if ( ! $captcha = wpcf7_init_captcha() ) { return false; } return $captcha->check( $prefix, $response ); } function wpcf7_remove_captcha( $prefix ) { if ( ! $captcha = wpcf7_init_captcha() ) { return false; } if ( preg_match( '/[^0-9]/', $prefix ) ) // Contact Form 7 generates $prefix with wp_rand() return false; $captcha->remove( $prefix ); } add_action( 'template_redirect', 'wpcf7_cleanup_captcha_files', 20 ); function wpcf7_cleanup_captcha_files() { if ( ! $captcha = wpcf7_init_captcha() ) { return false; } if ( is_callable( array( $captcha, 'cleanup' ) ) ) return $captcha->cleanup(); $dir = trailingslashit( wpcf7_captcha_tmp_dir() ); if ( ! is_dir( $dir ) || ! is_readable( $dir ) || ! wp_is_writable( $dir ) ) return false; if ( $handle = @opendir( $dir ) ) { while ( false !== ( $file = readdir( $handle ) ) ) { if ( ! preg_match( '/^[0-9]+\.(php|txt|png|gif|jpeg)$/', $file ) ) continue; $stat = @stat( $dir . $file ); if ( $stat['mtime'] + 3600 < time() ) // 3600 secs == 1 hour @unlink( $dir . $file ); } closedir( $handle ); } } function wpcf7_captchac_options( $options ) { if ( ! is_array( $options ) ) return array(); $op = array(); $image_size_array = preg_grep( '%^size:[smlSML]$%', $options ); if ( $image_size = array_shift( $image_size_array ) ) { preg_match( '%^size:([smlSML])$%', $image_size, $is_matches ); switch ( strtolower( $is_matches[1] ) ) { case 's': $op['img_size'] = array( 60, 20 ); $op['base'] = array( 6, 15 ); $op['font_size'] = 11; $op['font_char_width'] = 13; break; case 'l': $op['img_size'] = array( 84, 28 ); $op['base'] = array( 6, 20 ); $op['font_size'] = 17; $op['font_char_width'] = 19; break; case 'm': default: $op['img_size'] = array( 72, 24 ); $op['base'] = array( 6, 18 ); $op['font_size'] = 14; $op['font_char_width'] = 15; } } $fg_color_array = preg_grep( '%^fg:#([0-9a-fA-F]{3}|[0-9a-fA-F]{6})$%', $options ); if ( $fg_color = array_shift( $fg_color_array ) ) { preg_match( '%^fg:#([0-9a-fA-F]{3}|[0-9a-fA-F]{6})$%', $fg_color, $fc_matches ); if ( 3 == strlen( $fc_matches[1] ) ) { $r = substr( $fc_matches[1], 0, 1 ); $g = substr( $fc_matches[1], 1, 1 ); $b = substr( $fc_matches[1], 2, 1 ); $op['fg'] = array( hexdec( $r . $r ), hexdec( $g . $g ), hexdec( $b . $b ) ); } elseif ( 6 == strlen( $fc_matches[1] ) ) { $r = substr( $fc_matches[1], 0, 2 ); $g = substr( $fc_matches[1], 2, 2 ); $b = substr( $fc_matches[1], 4, 2 ); $op['fg'] = array( hexdec( $r ), hexdec( $g ), hexdec( $b ) ); } } $bg_color_array = preg_grep( '%^bg:#([0-9a-fA-F]{3}|[0-9a-fA-F]{6})$%', $options ); if ( $bg_color = array_shift( $bg_color_array ) ) { preg_match( '%^bg:#([0-9a-fA-F]{3}|[0-9a-fA-F]{6})$%', $bg_color, $bc_matches ); if ( 3 == strlen( $bc_matches[1] ) ) { $r = substr( $bc_matches[1], 0, 1 ); $g = substr( $bc_matches[1], 1, 1 ); $b = substr( $bc_matches[1], 2, 1 ); $op['bg'] = array( hexdec( $r . $r ), hexdec( $g . $g ), hexdec( $b . $b ) ); } elseif ( 6 == strlen( $bc_matches[1] ) ) { $r = substr( $bc_matches[1], 0, 2 ); $g = substr( $bc_matches[1], 2, 2 ); $b = substr( $bc_matches[1], 4, 2 ); $op['bg'] = array( hexdec( $r ), hexdec( $g ), hexdec( $b ) ); } } return $op; }