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<?php
/**
* Plugin Name: Obfuscate Email
* Version: 3.8.1
* Plugin URI: https://coffee2code.com/wp-plugins/obfuscate-email/
* Author: Scott Reilly
* Author URI: https://coffee2code.com/
* Text Domain: obfuscate-email
* License: GPLv2 or later
* License URI: https://www.gnu.org/licenses/gpl-2.0.html
* Description: Obfuscate email addresses to deter email-harvesting spammers.
*
* Compatible with WordPress 4.9+ through 5.7+.
*
* =>> Read the accompanying readme.txt file for instructions and documentation.
* =>> Also, visit the plugin's homepage for additional information and updates.
* =>> Or visit: https://wordpress.org/plugins/obfuscate-email/
*
* @package Obfuscate_Email
* @author Scott Reilly
* @version 3.8.1
*/
/*
Copyright (c) 2005-2021 by Scott Reilly (aka coffee2code)
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
defined( 'ABSPATH' ) or die();
if ( ! class_exists( 'c2c_ObfuscateEmail' ) ) :
require_once( dirname( __FILE__ ) . DIRECTORY_SEPARATOR . 'c2c-plugin.php' );
final class c2c_ObfuscateEmail extends c2c_Plugin_061 {
/**
* Name of plugin's setting.
*
* @since 3.6
* @var string
*/
const SETTING_NAME = 'c2c_obfuscate_email';
/**
* The one true instance.
*
* @var c2c_ObfuscateEmail
*/
private static $instance;
/**
* Default CSS class to indicate text direction enabled (public until filter is added).
*
* @var string
*/
public $css_text_direction = 'oe_textdirection';
/**
* CSS class to indicate non-display (public until filter is added).
*
* @var string
*/
public $css_display_none = 'oe_displaynone';
/**
* Get singleton instance.
*
* @since 3.2
*/
public static function instance() {
if ( ! isset( self::$instance ) ) {
self::$instance = new self();
}
return self::$instance;
}
/**
* Constructor.
*/
protected function __construct() {
parent::__construct( '3.8.1', 'obfuscate-email', 'c2c', __FILE__, array() );
register_activation_hook( __FILE__, array( __CLASS__, 'activation' ) );
return self::$instance = $this;
}
/**
* Handles activation tasks, such as registering the uninstall hook.
*
* @since 3.0
*/
public static function activation() {
register_uninstall_hook( __FILE__, array( __CLASS__, 'uninstall' ) );
}
/**
* Handles uninstallation tasks, such as deleting plugin options.
*
* @since 3.0
*/
public static function uninstall() {
delete_option( self::SETTING_NAME );
}
/**
* Initializes the plugin's config data array.
*
*
* @since 3.0
*/
public function load_config() {
$this->name = __( 'Obfuscate Email', 'obfuscate-email' );
$this->menu_name = $this->name;
$this->config = array(
'encode_everything' => array(
'input' => 'checkbox',
'default' => true,
'label' => __( 'Obfuscate entire email address?', 'obfuscate-email' ),
'help' => __( 'All characters of the email address will be obfuscated using hexadecimal HTML entity substitution.', 'obfuscate-email' ),
),
'at_replace' => array(
'input' => 'text',
'default' => '',
'label' => __( 'Replacement for \'<code>@</code>\'', 'obfuscate-email' ),
'help' => __( 'Only applicable if \'Obfuscate entire email address?\' is not checked.<br />Ex. set this to \'[at]\' to get person[at]email.com<br />If applicable but not defined, then <code>&#064;</code> (which is the encoding for @) will be used.', 'obfuscate-email' ),
),
'dot_replace' => array(
'input' => 'text',
'default' => '',
'label' => __( 'Replacement for \'<code>.</code>\'', 'obfuscate-email' ),
'help' => __( 'Only applicable if \'Obfuscate entire email address?\' is not checked.<br />Ex. set this to \'[dot]\' to get person@email[dot]com<br />If applicable but not defined, then <code>&#046;</code> (which is the encoding for .) will be used.', 'obfuscate-email' ),
),
'use_text_direction' => array(
'input' => 'checkbox',
'default' => false,
'label' => __( 'Utilize CSS text direction technique?', 'obfuscate-email' ),
'help' => __( 'This reverses the email address strings as they appear in the markup and utilizes CSS to reverse the text back to the correct direction for visitors to see/use. Note that copying-and-pasting of unlinked text email addresses will result in the pasted text being reversed. Copying the email address (via right-click menu) will work properly.', 'obfuscate-email' ),
),
'use_display_none' => array(
'input' => 'checkbox',
'default' => true,
'label' => __( 'Utilize CSS display:none technique?', 'obfuscate-email' ),
'help' => __( 'This embeds extraneous text within email address strings and then utilizes CSS to hide them so they don\'t appear to visitors.', 'obfuscate-email' ),
),
);
}
/**
* Override the plugin framework's register_filters() to actually hook actions/filters.
*
* @since 3.0
* @since 3.4 Don't do anything if in the admin area.
*/
public function register_filters() {
// Don't obfuscate email addresses in the admin area.
if ( is_admin() ) {
return;
}
/**
* Filters the list of filters processed by the plugin.
*
* @since 3.0
*
* @param array $filters The array of filters.
*/
$filters = (array) apply_filters(
'c2c_obfuscate_email_filters',
array(
'link_description', 'link_notes', 'bloginfo', 'nav_menu_description',
'term_description', 'the_title', 'the_content', 'get_the_excerpt', 'comment_text', 'list_cats', 'widget_text',
'the_author_email', 'get_comment_author_email',
)
);
foreach( $filters as $filter ) {
add_filter( $filter, array( $this, 'obfuscate_email' ), 15 );
}
add_action( 'wp_head', array( $this, 'add_css' ) );
}
/**
* Returns translated strings used by c2c_Plugin parent class.
*
* @since 3.8
*
* @param string $string Optional. The string whose translation should be
* returned, or an empty string to return all strings.
* Default ''.
* @return string|string[] The translated string, or if a string was provided
* but a translation was not found then the original
* string, or an array of all strings if $string is ''.
*/
public function get_c2c_string( $string = '' ) {
$strings = array(
'A value is required for: "%s"'
/* translators: %s: Label for setting. */
=> __( 'A value is required for: "%s"', 'obfuscate-email' ),
'Click for more help on this plugin'
=> __( 'Click for more help on this plugin', 'obfuscate-email' ),
' (especially check out the "Other Notes" tab, if present)'
=> __( ' (especially check out the "Other Notes" tab, if present)', 'obfuscate-email' ),
'Coffee fuels my coding.'
=> __( 'Coffee fuels my coding.', 'obfuscate-email' ),
'Did you find this plugin useful?'
=> __( 'Did you find this plugin useful?', 'obfuscate-email' ),
'Donate'
=> __( 'Donate', 'obfuscate-email' ),
'Expected integer value for: %s'
=> __( 'Expected integer value for: %s', 'obfuscate-email' ),
'Invalid file specified for C2C_Plugin: %s'
/* translators: %s: Path to the plugin file. */
=> __( 'Invalid file specified for C2C_Plugin: %s', 'obfuscate-email' ),
'More information about %1$s %2$s'
/* translators: 1: plugin name 2: plugin version */
=> __( 'More information about %1$s %2$s', 'obfuscate-email' ),
'More Help'
=> __( 'More Help', 'obfuscate-email' ),
'More Plugin Help'
=> __( 'More Plugin Help', 'obfuscate-email' ),
'Please consider a donation'
=> __( 'Please consider a donation', 'obfuscate-email' ),
'Reset Settings'
=> __( 'Reset Settings', 'obfuscate-email' ),
'Save Changes'
=> __( 'Save Changes', 'obfuscate-email' ),
'See the "Help" link to the top-right of the page for more help.'
=> __( 'See the "Help" link to the top-right of the page for more help.', 'obfuscate-email' ),
'Settings'
=> __( 'Settings', 'obfuscate-email' ),
'Settings reset.'
=> __( 'Settings reset.', 'obfuscate-email' ),
'Something went wrong.'
=> __( 'Something went wrong.', 'obfuscate-email' ),
'The plugin author homepage.'
=> __( 'The plugin author homepage.', 'obfuscate-email' ),
"The plugin configuration option '%s' must be supplied."
/* translators: %s: The setting configuration key name. */
=>__( "The plugin configuration option '%s' must be supplied.", 'obfuscate-email' ),
'This plugin brought to you by %s.'
/* translators: %s: Link to plugin author's homepage. */
=> __( 'This plugin brought to you by %s.', 'obfuscate-email' ),
);
if ( ! $string ) {
return array_values( $strings );
}
return ! empty( $strings[ $string ] ) ? $strings[ $string ] : $string;
}
/**
* Output CSS.
*/
public function add_css() {
$type_attr = current_theme_supports( 'html5' ) ? '' : ' type="text/css"';
echo <<<HTML
<style{$type_attr}>
span.{$this->css_text_direction} { unicode-bidi: bidi-override; direction: rtl; }
span.{$this->css_display_none} { display: none; }
</style>
HTML;
}
/**
* Obfuscate plaintext emails.
*
* @param string $text The text containing emails to obfuscate.
* @param array $args An array of configuration options, each element of which will override the plugin's corresponding default setting.
* @return string The text with emails obfuscated.
*/
public function obfuscate_email( $text, $args = array() ) {
$options = $this->get_options();
if ( $args ) {
$options = $this->options = wp_parse_args( $args, $options );
}
$text = ' ' . $text . ' ';
$cb = array( $this, 'obfuscate_email_cb' );
$cb_for_attribute = array( $this, 'obfuscate_email_in_attribute_cb' );
// pre-3.0 regex : "#(([a-z0-9\-_\.]+?)@([^\s,{}\(\)\[\]]+\.[^\s.,{}\(\)\[\]]+))#iesU"
// This isn't making any attempts to only recognize valid email address
// syntax. Basically anything roughly like x@y.zz looks like an email address.
$email_regex = '([.0-9a-z_+-]+)@(([0-9a-z-]+\.)+[0-9a-z]{2,})';
// This matches emails except for those appearing in tag attributes.
// (only need that refinement if wrapping text in tags)
if ( $options['use_text_direction'] || $options['use_display_none'] ) {
$text = preg_replace_callback( "#(?!<.*?)$email_regex(?![^<>]*?>)#i", $cb, $text );
}
// If checking again, then the only emails that are left are those in
// attributes. Is the first check if use_text_direction is false.
$text = preg_replace_callback( "#$email_regex#i", $cb_for_attribute, $text );
return trim( $text );
}
/**
* Obfuscate plaintext emails callback for email address appearing in tag
* attribute.
*
* @since 3.1
*
* @param string $email The email to obfuscate.
* @return string The obfuscated email.
*/
public function obfuscate_email_in_attribute_cb( $matches ) {
return $this->obfuscate_email_cb( $matches, false );
}
/**
* Obfuscate plaintext emails callback.
*
* @param string $email The email to obfuscate.
* @return string The obfuscated email.
*/
public function obfuscate_email_cb( $matches, $allow_markup = true ) {
$options = $this->get_options();
$email_name = $matches[1];
$email_host = $matches[2];
if ( $allow_markup && $options['use_text_direction'] ) {
$email_name = strrev( $email_name );
$email_host = strrev( $email_host );
}
if ( $options['encode_everything'] ) {
$email_name = substr( chunk_split( bin2hex( " $email_name" ), 2, ";&#x" ), 3, -3 );
$email_host = substr( chunk_split( bin2hex( " $email_host" ), 2, ";&#x" ), 3, -3 );
$at = '@';
} else {
$at = empty( $options['at_replace'] ) ? '@' : $options['at_replace'];
$dot = empty( $options['dot_replace'] ) ? '.' : $options['dot_replace'];
if ( ! $allow_markup ) {
$at = esc_attr( trim( $at ) );
$dot = esc_attr( trim( $dot ) );
}
// If reversing text, also reverse the AT and DOT replacements unless they
// look like they are HTML encoded entities. Very crude.
if ( $options['use_text_direction'] ) {
if ( false === strpos( $at, '&' ) ) {
$at = strrev( $at );
}
if ( false === strpos( $dot, '&' ) ) {
$dot = strrev( $dot );
}
}
$email_host = str_replace( '.', $dot, $email_host );
}
if ( $allow_markup && $options['use_display_none'] ) {
$none = '<span class="' . esc_attr( $this->css_display_none ) . '">null</span>';
if ( $options['use_text_direction'] ) {
$at = $none . $at;
} else {
$at .= $none;
}
}
if ( $allow_markup && $options['use_text_direction'] ) {
$email = $email_host . $at . $email_name;
} else {
$email = $email_name . $at . $email_host;
}
if ( $allow_markup && $options['use_text_direction'] ) {
$email = '<span class="' . esc_attr( $this->css_text_direction ) . '">' . $email . '</span>';
}
return $email;
}
} // end c2c_ObfuscateEmail
add_action( 'plugins_loaded', array( 'c2c_ObfuscateEmail', 'instance' ) );
endif; // end if !class_exists()
if ( ! function_exists( 'c2c_obfuscate_email' ) ) :
/**
* Text to parse for plaintext emails to be obfuscated.
*
* @param string $text The text to parse for email addresses to obfuscate.
* @param array $args An array of configuration options, each element of which will override the plugin's corresponding default setting.
* @return string The text with email addresses obfuscated.
*/
function c2c_obfuscate_email( $text, $args = array(), $deprecated_1 = null, $deprecated_2 = null, $deprecated_3 = null ) {
if ( ! is_array( $args ) || $deprecated_1 || $deprecated_2 || $deprecated_3 ) {
_deprecated_argument( __FUNCTION__, '3.0', 'Use $args array argument to override default settings.' );
}
return c2c_ObfuscateEmail::instance()->obfuscate_email( $text, $args );
}
endif;
/**
* *******************
* DEPRECATED FUNCTIONS
* *******************
*/
// To be removed in v3.1 of plugin
if ( ! function_exists( 'c2c_email_obfuscator' ) ) :
/**
* Obfuscate plaintext emails.
*
* @deprecated since 3.0 Use c2c_obfuscate_email()
*
* @param string $email The email to obfuscate.
* @return string The obfuscated email.
*/
function c2c_email_obfuscator( $email, $encode_everything = true, $at_replace = '@', $dot_replace = '.' ) {
_deprecated_function( __FUNCTION__, '3.0', 'c2c_obfuscate_email' );
return c2c_obfuscate_email( $email );
}
endif;