true )
);
// CAPTCHA-Response (input)
wpcf7_add_form_tag( 'captchar',
'wpcf7_captchar_form_tag_handler',
array(
'name-attr' => true,
'do-not-store' => true,
)
);
}
function wpcf7_captchac_form_tag_handler( $tag ) {
if ( ! class_exists( 'ReallySimpleCaptcha' ) ) {
$error = sprintf(
esc_html( __( "To use CAPTCHA, you need %s plugin installed.", 'contact-form-7' ) ),
wpcf7_link( 'https://wordpress.org/plugins/really-simple-captcha/', 'Really Simple CAPTCHA' ) );
return sprintf( '%s ', $error );
}
if ( empty( $tag->name ) ) {
return '';
}
$class = wpcf7_form_controls_class( $tag->type );
$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(
'
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 ) . '
' . esc_html( $message ) . '
' . "\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;
}
// Contact Form 7 generates $prefix with wp_rand()
if ( preg_match( '/[^0-9]/', $prefix ) ) {
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;
}