validation_error( $name );
$atts = '';
$id_att = '';
$class_att = '';
$size_att = '';
$maxlength_att = '';
if ( 'captchac' == $type )
$class_att .= ' wpcf7-captcha-' . $name;
foreach ( $options as $option ) {
if ( preg_match( '%^id:([-0-9a-zA-Z_]+)$%', $option, $matches ) ) {
$id_att = $matches[1];
} elseif ( preg_match( '%^class:([-0-9a-zA-Z_]+)$%', $option, $matches ) ) {
$class_att .= ' ' . $matches[1];
} elseif ( preg_match( '%^([0-9]*)[/x]([0-9]*)$%', $option, $matches ) ) {
$size_att = (int) $matches[1];
$maxlength_att = (int) $matches[2];
}
}
if ( $id_att )
$atts .= ' id="' . trim( $id_att ) . '"';
if ( $class_att )
$atts .= ' class="' . trim( $class_att ) . '"';
// Value.
if ( is_a( $wpcf7_contact_form, 'WPCF7_ContactForm' ) && $wpcf7_contact_form->is_posted() )
$value = '';
else
$value = $values[0];
if ( 'captchac' == $type ) {
if ( ! class_exists( 'ReallySimpleCaptcha' ) ) {
return '' . __( 'To use CAPTCHA, you need Really Simple CAPTCHA plugin installed.', 'wpcf7' ) . '';
}
$op = array();
// Default
$op['img_size'] = array( 72, 24 );
$op['base'] = array( 6, 18 );
$op['font_size'] = 14;
$op['font_char_width'] = 15;
$op = array_merge( $op, wpcf7_captchac_options( $options ) );
if ( ! $filename = wpcf7_generate_captcha( $op ) )
return '';
if ( is_array( $op['img_size'] ) )
$atts .= ' width="' . $op['img_size'][0] . '" height="' . $op['img_size'][1] . '"';
$captcha_url = trailingslashit( wpcf7_captcha_tmp_url() ) . $filename;
$html = '
';
$ref = substr( $filename, 0, strrpos( $filename, '.' ) );
$html = '' . $html;
return $html;
} elseif ( 'captchar' == $type ) {
if ( $size_att )
$atts .= ' size="' . $size_att . '"';
else
$atts .= ' size="40"'; // default size
if ( $maxlength_att )
$atts .= ' maxlength="' . $maxlength_att . '"';
$html = '';
$html = '' . $html . $validation_error . '';
return $html;
}
}
wpcf7_add_shortcode( 'captchac', 'wpcf7_captcha_shortcode_handler', true );
wpcf7_add_shortcode( 'captchar', 'wpcf7_captcha_shortcode_handler', true );
/* Validation filter */
function wpcf7_captcha_validation_filter( $result, $tag ) {
global $wpcf7_contact_form;
$type = $tag['type'];
$name = $tag['name'];
$_POST[$name] = (string) $_POST[$name];
$captchac = '_wpcf7_captcha_challenge_' . $name;
if ( ! wpcf7_check_captcha( $_POST[$captchac], $_POST[$name] ) ) {
$result['valid'] = false;
$result['reason'][$name] = $wpcf7_contact_form->message( 'captcha_not_match' );
}
wpcf7_remove_captcha( $_POST[$captchac] );
return $result;
}
add_filter( 'wpcf7_validate_captchar', 'wpcf7_captcha_validation_filter', 10, 2 );
/* Ajax echo filter */
function wpcf7_captcha_ajax_echo_filter( $items ) {
global $wpcf7_contact_form;
if ( ! is_a( $wpcf7_contact_form, 'WPCF7_ContactForm' ) )
return $items;
if ( ! is_array( $items ) )
return $items;
$fes = $wpcf7_contact_form->form_scan_shortcode(
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 = trailingslashit( wpcf7_captcha_tmp_url() ) . $filename;
$refill[$name] = $captcha_url;
}
}
if ( ! empty( $refill ) )
$items['captcha'] = $refill;
return $items;
}
add_filter( 'wpcf7_ajax_json_echo', 'wpcf7_captcha_ajax_echo_filter' );
/* CAPTCHA functions */
function wpcf7_init_captcha() {
global $wpcf7_captcha;
if ( ! class_exists( 'ReallySimpleCaptcha' ) )
return false;
if ( ! is_object( $wpcf7_captcha ) )
$wpcf7_captcha = new ReallySimpleCaptcha();
$captcha =& $wpcf7_captcha;
$captcha->tmp_dir = trailingslashit( wpcf7_captcha_tmp_dir() );
wp_mkdir_p( $captcha->tmp_dir );
return true;
}
function wpcf7_generate_captcha( $options = null ) {
global $wpcf7_captcha;
if ( ! wpcf7_init_captcha() )
return false;
$captcha =& $wpcf7_captcha;
if ( ! is_dir( $captcha->tmp_dir ) || ! 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 = mt_rand();
$captcha_word = $captcha->generate_random_word();
return $captcha->generate_image( $prefix, $captcha_word );
}
function wpcf7_check_captcha( $prefix, $response ) {
global $wpcf7_captcha;
if ( ! wpcf7_init_captcha() )
return false;
$captcha =& $wpcf7_captcha;
return $captcha->check( $prefix, $response );
}
function wpcf7_remove_captcha( $prefix ) {
global $wpcf7_captcha;
if ( ! wpcf7_init_captcha() )
return false;
$captcha =& $wpcf7_captcha;
$captcha->remove( $prefix );
}
function wpcf7_cleanup_captcha_files() {
$dir = trailingslashit( wpcf7_captcha_tmp_dir() );
if ( ! is_dir( $dir ) )
return false;
if ( ! is_readable( $dir ) )
return false;
if ( ! is_writable( $dir ) )
return false;
if ( $handle = @opendir( $dir ) ) {
while ( false !== ( $file = readdir( $handle ) ) ) {
if ( ! preg_match( '/^[0-9]+\.(php|png|gif|jpeg)$/', $file ) )
continue;
$stat = stat( $dir . $file );
if ( $stat['mtime'] + 21600 < time() ) // 21600 secs == 6 hours
@unlink( $dir . $file );
}
closedir( $handle );
}
}
if ( ! is_admin() && 'GET' == $_SERVER['REQUEST_METHOD'] )
wpcf7_cleanup_captcha_files();
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;
}
$wpcf7_captcha = null;
?>