520 lines
16 KiB
PHP
520 lines
16 KiB
PHP
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<?php
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/**
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** A base module for [captchac] and [captchar]
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**/
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/* Shortcode handler */
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wpcf7_add_shortcode( 'captchac', 'wpcf7_captcha_shortcode_handler', true );
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wpcf7_add_shortcode( 'captchar', 'wpcf7_captcha_shortcode_handler', true );
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function wpcf7_captcha_shortcode_handler( $tag ) {
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if ( ! is_array( $tag ) )
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return '';
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$type = $tag['type'];
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$name = $tag['name'];
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$options = (array) $tag['options'];
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$values = (array) $tag['values'];
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if ( empty( $name ) )
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return '';
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$validation_error = wpcf7_get_validation_error( $name );
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$atts = $id_att = $size_att = $maxlength_att = $tabindex_att = $title_att = '';
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$class_att = wpcf7_form_controls_class( $type );
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if ( 'captchac' == $type )
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$class_att .= ' wpcf7-captcha-' . $name;
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if ( $validation_error && 'captchar' == $type )
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$class_att .= ' wpcf7-not-valid';
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foreach ( $options as $option ) {
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if ( preg_match( '%^id:([-0-9a-zA-Z_]+)$%', $option, $matches ) ) {
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$id_att = $matches[1];
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} elseif ( preg_match( '%^class:([-0-9a-zA-Z_]+)$%', $option, $matches ) ) {
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$class_att .= ' ' . $matches[1];
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} elseif ( preg_match( '%^([0-9]*)[/x]([0-9]*)$%', $option, $matches ) ) {
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$size_att = (int) $matches[1];
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$maxlength_att = (int) $matches[2];
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} elseif ( preg_match( '%^tabindex:(\d+)$%', $option, $matches ) ) {
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$tabindex_att = (int) $matches[1];
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}
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}
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// Value.
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$value = '';
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if ( 'captchar' == $type && ! wpcf7_is_posted() && isset( $values[0] ) ) {
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$value = $values[0];
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if ( wpcf7_script_is() && preg_grep( '%^watermark$%', $options ) ) {
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$class_att .= ' wpcf7-use-title-as-watermark';
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$title_att .= sprintf( ' %s', $value );
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$value = '';
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}
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}
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if ( $id_att )
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$atts .= ' id="' . trim( $id_att ) . '"';
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if ( $class_att )
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$atts .= ' class="' . trim( $class_att ) . '"';
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if ( 'captchac' == $type ) {
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if ( ! class_exists( 'ReallySimpleCaptcha' ) ) {
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return '<em>' . __( 'To use CAPTCHA, you need <a href="http://wordpress.org/extend/plugins/really-simple-captcha/">Really Simple CAPTCHA</a> plugin installed.', 'wpcf7' ) . '</em>';
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}
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$op = array();
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// Default
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$op['img_size'] = array( 72, 24 );
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$op['base'] = array( 6, 18 );
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$op['font_size'] = 14;
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$op['font_char_width'] = 15;
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$op = array_merge( $op, wpcf7_captchac_options( $options ) );
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if ( ! $filename = wpcf7_generate_captcha( $op ) )
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return '';
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if ( is_array( $op['img_size'] ) )
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$atts .= ' width="' . $op['img_size'][0] . '" height="' . $op['img_size'][1] . '"';
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$captcha_url = trailingslashit( wpcf7_captcha_tmp_url() ) . $filename;
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$html = '<img alt="captcha" src="' . $captcha_url . '"' . $atts . ' />';
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$ref = substr( $filename, 0, strrpos( $filename, '.' ) );
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$html = '<input type="hidden" name="_wpcf7_captcha_challenge_' . $name . '" value="' . $ref . '" />' . $html;
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return $html;
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} elseif ( 'captchar' == $type ) {
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if ( $size_att )
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$atts .= ' size="' . $size_att . '"';
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else
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$atts .= ' size="40"'; // default size
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if ( $maxlength_att )
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$atts .= ' maxlength="' . $maxlength_att . '"';
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if ( '' !== $tabindex_att )
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$atts .= sprintf( ' tabindex="%d"', $tabindex_att );
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if ( '' !== $title_att )
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$atts .= sprintf( ' title="%s"', trim( esc_attr( $title_att ) ) );
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$html = '<input type="text" name="' . $name . '" value="' . esc_attr( $value ) . '"' . $atts . ' />';
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$html = '<span class="wpcf7-form-control-wrap ' . $name . '">' . $html . $validation_error . '</span>';
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return $html;
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}
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}
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/* Validation filter */
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add_filter( 'wpcf7_validate_captchar', 'wpcf7_captcha_validation_filter', 10, 2 );
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function wpcf7_captcha_validation_filter( $result, $tag ) {
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$type = $tag['type'];
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$name = $tag['name'];
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$_POST[$name] = (string) $_POST[$name];
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$captchac = '_wpcf7_captcha_challenge_' . $name;
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if ( ! wpcf7_check_captcha( $_POST[$captchac], $_POST[$name] ) ) {
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$result['valid'] = false;
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$result['reason'][$name] = wpcf7_get_message( 'captcha_not_match' );
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}
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wpcf7_remove_captcha( $_POST[$captchac] );
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return $result;
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}
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/* Ajax echo filter */
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add_filter( 'wpcf7_ajax_onload', 'wpcf7_captcha_ajax_refill' );
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add_filter( 'wpcf7_ajax_json_echo', 'wpcf7_captcha_ajax_refill' );
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function wpcf7_captcha_ajax_refill( $items ) {
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if ( ! is_array( $items ) )
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return $items;
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$fes = wpcf7_scan_shortcode( array( 'type' => 'captchac' ) );
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if ( empty( $fes ) )
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return $items;
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$refill = array();
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foreach ( $fes as $fe ) {
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$name = $fe['name'];
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$options = $fe['options'];
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if ( empty( $name ) )
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continue;
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$op = wpcf7_captchac_options( $options );
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if ( $filename = wpcf7_generate_captcha( $op ) ) {
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$captcha_url = trailingslashit( wpcf7_captcha_tmp_url() ) . $filename;
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$refill[$name] = $captcha_url;
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}
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}
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if ( ! empty( $refill ) )
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$items['captcha'] = $refill;
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return $items;
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}
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/* Messages */
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add_filter( 'wpcf7_messages', 'wpcf7_captcha_messages' );
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function wpcf7_captcha_messages( $messages ) {
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return array_merge( $messages, array( 'captcha_not_match' => array(
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'description' => __( "The code that sender entered does not match the CAPTCHA", 'wpcf7' ),
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'default' => __( 'Your entered code is incorrect.', 'wpcf7' )
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) ) );
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}
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/* Tag generator */
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add_action( 'admin_init', 'wpcf7_add_tag_generator_captcha', 45 );
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function wpcf7_add_tag_generator_captcha() {
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if ( ! function_exists( 'wpcf7_add_tag_generator' ) )
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return;
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wpcf7_add_tag_generator( 'captcha', __( 'CAPTCHA', 'wpcf7' ),
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'wpcf7-tg-pane-captcha', 'wpcf7_tg_pane_captcha' );
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}
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function wpcf7_tg_pane_captcha( &$contact_form ) {
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?>
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<div id="wpcf7-tg-pane-captcha" class="hidden">
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<form action="">
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<table>
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<?php if ( ! class_exists( 'ReallySimpleCaptcha' ) ) : ?>
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<tr><td colspan="2"><strong style="color: #e6255b"><?php echo esc_html( __( "Note: To use CAPTCHA, you need Really Simple CAPTCHA plugin installed.", 'wpcf7' ) ); ?></strong><br /><a href="http://wordpress.org/extend/plugins/really-simple-captcha/">http://wordpress.org/extend/plugins/really-simple-captcha/</a></td></tr>
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<?php endif; ?>
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<tr><td><?php echo esc_html( __( 'Name', 'wpcf7' ) ); ?><br /><input type="text" name="name" class="tg-name oneline" /></td><td></td></tr>
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</table>
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<table class="scope captchac">
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<caption><?php echo esc_html( __( "Image settings", 'wpcf7' ) ); ?></caption>
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<tr>
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<td><code>id</code> (<?php echo esc_html( __( 'optional', 'wpcf7' ) ); ?>)<br />
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<input type="text" name="id" class="idvalue oneline option" /></td>
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<td><code>class</code> (<?php echo esc_html( __( 'optional', 'wpcf7' ) ); ?>)<br />
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<input type="text" name="class" class="classvalue oneline option" /></td>
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</tr>
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<tr>
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<td><?php echo esc_html( __( "Foreground color", 'wpcf7' ) ); ?> (<?php echo esc_html( __( 'optional', 'wpcf7' ) ); ?>)<br />
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<input type="text" name="fg" class="color oneline option" /></td>
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<td><?php echo esc_html( __( "Background color", 'wpcf7' ) ); ?> (<?php echo esc_html( __( 'optional', 'wpcf7' ) ); ?>)<br />
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<input type="text" name="bg" class="color oneline option" /></td>
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</tr>
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<tr><td colspan="2"><?php echo esc_html( __( "Image size", 'wpcf7' ) ); ?> (<?php echo esc_html( __( 'optional', 'wpcf7' ) ); ?>)<br />
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<input type="checkbox" name="size:s" class="exclusive option" /> <?php echo esc_html( __( "Small", 'wpcf7' ) ); ?> 
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<input type="checkbox" name="size:m" class="exclusive option" /> <?php echo esc_html( __( "Medium", 'wpcf7' ) ); ?> 
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<input type="checkbox" name="size:l" class="exclusive option" /> <?php echo esc_html( __( "Large", 'wpcf7' ) ); ?>
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</td></tr>
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</table>
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<table class="scope captchar">
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<caption><?php echo esc_html( __( "Input field settings", 'wpcf7' ) ); ?></caption>
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<tr>
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<td><code>id</code> (<?php echo esc_html( __( 'optional', 'wpcf7' ) ); ?>)<br />
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<input type="text" name="id" class="idvalue oneline option" /></td>
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<td><code>class</code> (<?php echo esc_html( __( 'optional', 'wpcf7' ) ); ?>)<br />
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<input type="text" name="class" class="classvalue oneline option" /></td>
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</tr>
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<tr>
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<td><code>size</code> (<?php echo esc_html( __( 'optional', 'wpcf7' ) ); ?>)<br />
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<input type="text" name="size" class="numeric oneline option" /></td>
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<td><code>maxlength</code> (<?php echo esc_html( __( 'optional', 'wpcf7' ) ); ?>)<br />
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<input type="text" name="maxlength" class="numeric oneline option" /></td>
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</tr>
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</table>
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<div class="tg-tag"><?php echo esc_html( __( "Copy this code and paste it into the form left.", 'wpcf7' ) ); ?>
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<br />1) <?php echo esc_html( __( "For image", 'wpcf7' ) ); ?>
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<input type="text" name="captchac" class="tag" readonly="readonly" onfocus="this.select()" />
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<br />2) <?php echo esc_html( __( "For input field", 'wpcf7' ) ); ?>
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<input type="text" name="captchar" class="tag" readonly="readonly" onfocus="this.select()" />
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</div>
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</form>
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</div>
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<?php
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}
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/* Warning message */
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add_action( 'wpcf7_admin_notices', 'wpcf7_captcha_display_warning_message' );
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function wpcf7_captcha_display_warning_message() {
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if ( empty( $_GET['post'] ) || ! $contact_form = wpcf7_contact_form( $_GET['post'] ) )
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return;
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$has_tags = (bool) $contact_form->form_scan_shortcode(
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array( 'type' => array( 'captchac' ) ) );
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if ( ! $has_tags )
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return;
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if ( ! class_exists( 'ReallySimpleCaptcha' ) )
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return;
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$uploads_dir = wpcf7_captcha_tmp_dir();
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wpcf7_init_captcha();
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if ( ! is_dir( $uploads_dir ) || ! is_writable( $uploads_dir ) ) {
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$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.', 'wpcf7' ), $uploads_dir );
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echo '<div class="error"><p><strong>' . esc_html( $message ) . '</strong></p></div>';
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}
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if ( ! function_exists( 'imagecreatetruecolor' ) || ! function_exists( 'imagettftext' ) ) {
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$message = __( 'This contact form contains CAPTCHA fields, but the necessary libraries (GD and FreeType) are not available on your server.', 'wpcf7' );
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echo '<div class="error"><p><strong>' . esc_html( $message ) . '</strong></p></div>';
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}
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}
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/* CAPTCHA functions */
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function wpcf7_init_captcha() {
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global $wpcf7_captcha;
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if ( ! class_exists( 'ReallySimpleCaptcha' ) )
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return false;
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if ( ! is_object( $wpcf7_captcha ) )
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$wpcf7_captcha = new ReallySimpleCaptcha();
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$dir = trailingslashit( wpcf7_captcha_tmp_dir() );
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$wpcf7_captcha->tmp_dir = $dir;
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if ( is_callable( array( $wpcf7_captcha, 'make_tmp_dir' ) ) )
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return $wpcf7_captcha->make_tmp_dir();
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if ( ! wp_mkdir_p( $dir ) )
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return false;
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$htaccess_file = $dir . '.htaccess';
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if ( file_exists( $htaccess_file ) )
|
||
|
|
return true;
|
||
|
|
|
||
|
|
if ( $handle = @fopen( $htaccess_file, 'w' ) ) {
|
||
|
|
fwrite( $handle, 'Order deny,allow' . "\n" );
|
||
|
|
fwrite( $handle, 'Deny from all' . "\n" );
|
||
|
|
fwrite( $handle, '<Files ~ "^[0-9A-Za-z]+\\.(jpeg|gif|png)$">' . "\n" );
|
||
|
|
fwrite( $handle, ' Allow from all' . "\n" );
|
||
|
|
fwrite( $handle, '</Files>' . "\n" );
|
||
|
|
fclose( $handle );
|
||
|
|
}
|
||
|
|
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
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_generate_captcha( $options = null ) {
|
||
|
|
global $wpcf7_captcha;
|
||
|
|
|
||
|
|
if ( ! wpcf7_init_captcha() )
|
||
|
|
return false;
|
||
|
|
|
||
|
|
if ( ! is_dir( $wpcf7_captcha->tmp_dir ) || ! is_writable( $wpcf7_captcha->tmp_dir ) )
|
||
|
|
return false;
|
||
|
|
|
||
|
|
$img_type = imagetypes();
|
||
|
|
if ( $img_type & IMG_PNG )
|
||
|
|
$wpcf7_captcha->img_type = 'png';
|
||
|
|
elseif ( $img_type & IMG_GIF )
|
||
|
|
$wpcf7_captcha->img_type = 'gif';
|
||
|
|
elseif ( $img_type & IMG_JPG )
|
||
|
|
$wpcf7_captcha->img_type = 'jpeg';
|
||
|
|
else
|
||
|
|
return false;
|
||
|
|
|
||
|
|
if ( is_array( $options ) ) {
|
||
|
|
if ( isset( $options['img_size'] ) )
|
||
|
|
$wpcf7_captcha->img_size = $options['img_size'];
|
||
|
|
if ( isset( $options['base'] ) )
|
||
|
|
$wpcf7_captcha->base = $options['base'];
|
||
|
|
if ( isset( $options['font_size'] ) )
|
||
|
|
$wpcf7_captcha->font_size = $options['font_size'];
|
||
|
|
if ( isset( $options['font_char_width'] ) )
|
||
|
|
$wpcf7_captcha->font_char_width = $options['font_char_width'];
|
||
|
|
if ( isset( $options['fg'] ) )
|
||
|
|
$wpcf7_captcha->fg = $options['fg'];
|
||
|
|
if ( isset( $options['bg'] ) )
|
||
|
|
$wpcf7_captcha->bg = $options['bg'];
|
||
|
|
}
|
||
|
|
|
||
|
|
$prefix = mt_rand();
|
||
|
|
$captcha_word = $wpcf7_captcha->generate_random_word();
|
||
|
|
return $wpcf7_captcha->generate_image( $prefix, $captcha_word );
|
||
|
|
}
|
||
|
|
|
||
|
|
function wpcf7_check_captcha( $prefix, $response ) {
|
||
|
|
global $wpcf7_captcha;
|
||
|
|
|
||
|
|
if ( ! wpcf7_init_captcha() )
|
||
|
|
return false;
|
||
|
|
|
||
|
|
return $wpcf7_captcha->check( $prefix, $response );
|
||
|
|
}
|
||
|
|
|
||
|
|
function wpcf7_remove_captcha( $prefix ) {
|
||
|
|
global $wpcf7_captcha;
|
||
|
|
|
||
|
|
if ( ! wpcf7_init_captcha() )
|
||
|
|
return false;
|
||
|
|
|
||
|
|
if ( preg_match( '/[^0-9]/', $prefix ) ) // Contact Form 7 generates $prefix with mt_rand()
|
||
|
|
return false;
|
||
|
|
|
||
|
|
$wpcf7_captcha->remove( $prefix );
|
||
|
|
}
|
||
|
|
|
||
|
|
function wpcf7_cleanup_captcha_files() {
|
||
|
|
global $wpcf7_captcha;
|
||
|
|
|
||
|
|
if ( ! wpcf7_init_captcha() )
|
||
|
|
return false;
|
||
|
|
|
||
|
|
if ( is_callable( array( $wpcf7_captcha, 'cleanup' ) ) )
|
||
|
|
return $wpcf7_captcha->cleanup();
|
||
|
|
|
||
|
|
$dir = trailingslashit( wpcf7_captcha_tmp_dir() );
|
||
|
|
|
||
|
|
if ( ! is_dir( $dir ) || ! is_readable( $dir ) || ! 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 );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
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;
|
||
|
|
|
||
|
|
?>
|