<?php

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/**

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** A base module for [captchac] and [captchar]

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**/

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/* form_tag handler */

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add_action( 'wpcf7_init', 'wpcf7_add_form_tag_captcha', 10, 0 );

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function wpcf7_add_form_tag_captcha() {

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// CAPTCHA-Challenge (image)

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wpcf7_add_form_tag( 'captchac',

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'wpcf7_captchac_form_tag_handler',

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array(

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'name-attr' => true,

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'zero-controls-container' => true,

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'not-for-mail' => true,

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)

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);

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// CAPTCHA-Response (input)

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wpcf7_add_form_tag( 'captchar',

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'wpcf7_captchar_form_tag_handler',

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array(

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'name-attr' => true,

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'do-not-store' => true,

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'not-for-mail' => true,

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)

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);

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}

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function wpcf7_captchac_form_tag_handler( $tag ) {

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if ( ! class_exists( 'ReallySimpleCaptcha' ) ) {

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$error = sprintf(

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/* translators: %s: link labeled 'Really Simple CAPTCHA' */

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esc_html( __( "To use CAPTCHA, you need %s plugin installed.", 'contact-form-7' ) ),

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wpcf7_link( 'https://wordpress.org/plugins/really-simple-captcha/', 'Really Simple CAPTCHA' )

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);

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return sprintf( '<em>%s</em>', $error );

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}

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if ( empty( $tag->name ) ) {

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return '';

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}

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$class = wpcf7_form_controls_class( $tag->type );

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$class .= ' wpcf7-captcha-' . str_replace( ':', '', $tag->name );

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$atts = array();

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$atts['class'] = $tag->get_class_option( $class );

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$atts['id'] = $tag->get_id_option();

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$op = array( // Default

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'img_size' => array( 72, 24 ),

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'base' => array( 6, 18 ),

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'font_size' => 14,

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'font_char_width' => 15,

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);

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$op = array_merge( $op, wpcf7_captchac_options( $tag->options ) );

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if ( ! $filename = wpcf7_generate_captcha( $op ) ) {

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return '';

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}

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if ( ! empty( $op['img_size'] ) ) {

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if ( isset( $op['img_size'][0] ) ) {

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$atts['width'] = $op['img_size'][0];

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}

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if ( isset( $op['img_size'][1] ) ) {

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$atts['height'] = $op['img_size'][1];

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}

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}

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$atts['alt'] = 'captcha';

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$atts['src'] = wpcf7_captcha_url( $filename );

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$atts = wpcf7_format_atts( $atts );

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$prefix = substr( $filename, 0, strrpos( $filename, '.' ) );

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$html = sprintf(

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'<input type="hidden" name="%1$s" value="%2$s" /><img %3$s />',

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esc_attr( sprintf( '_wpcf7_captcha_challenge_%s', $tag->name ) ),

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esc_attr( $prefix ),

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$atts

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);

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return $html;

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}

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function wpcf7_captchar_form_tag_handler( $tag ) {

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if ( empty( $tag->name ) ) {

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return '';

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}

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$validation_error = wpcf7_get_validation_error( $tag->name );

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$class = wpcf7_form_controls_class( $tag->type );

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if ( $validation_error ) {

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$class .= ' wpcf7-not-valid';

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}

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$atts = array();

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$atts['size'] = $tag->get_size_option( '40' );

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$atts['maxlength'] = $tag->get_maxlength_option();

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$atts['minlength'] = $tag->get_minlength_option();

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if ( $atts['maxlength'] and $atts['minlength']

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and $atts['maxlength'] < $atts['minlength'] ) {

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unset( $atts['maxlength'], $atts['minlength'] );

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}

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$atts['class'] = $tag->get_class_option( $class );

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$atts['id'] = $tag->get_id_option();

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$atts['tabindex'] = $tag->get_option( 'tabindex', 'signed_int', true );

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$atts['autocomplete'] = 'off';

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if ( $validation_error ) {

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$atts['aria-invalid'] = 'true';

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$atts['aria-describedby'] = wpcf7_get_validation_error_reference(

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$tag->name

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);

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} else {

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$atts['aria-invalid'] = 'false';

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}

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$value = (string) reset( $tag->values );

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if ( wpcf7_is_posted() ) {

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$value = '';

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}

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if ( $tag->has_option( 'placeholder' )

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or $tag->has_option( 'watermark' ) ) {

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$atts['placeholder'] = $value;

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$value = '';

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}

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$atts['value'] = $value;

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$atts['type'] = 'text';

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$atts['name'] = $tag->name;

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$html = sprintf(

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'<span class="wpcf7-form-control-wrap" data-name="%1$s"><input %2$s />%3$s</span>',

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esc_attr( $tag->name ),

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wpcf7_format_atts( $atts ),

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$validation_error

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);

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return $html;

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}

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/* Validation filter */

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add_filter( 'wpcf7_validate_captchar',

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'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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$captchac = '_wpcf7_captcha_challenge_' . $name;

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$prefix = (string) ( $_POST[$captchac] ?? '' );

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$response = (string) ( $_POST[$name] ?? '' );

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$response = wpcf7_canonicalize( $response );

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if ( 0 === strlen( $prefix )

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or ! wpcf7_check_captcha( $prefix, $response ) ) {

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$result->invalidate( $tag, wpcf7_get_message( 'captcha_not_match' ) );

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}

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if ( 0 !== strlen( $prefix ) ) {

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wpcf7_remove_captcha( $prefix );

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}

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return $result;

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}

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/* Ajax echo filter */

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add_filter( 'wpcf7_refill_response', 'wpcf7_captcha_ajax_refill', 10, 1 );

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add_filter( 'wpcf7_feedback_response', 'wpcf7_captcha_ajax_refill', 10, 1 );

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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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}

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$tags = wpcf7_scan_form_tags( array( 'type' => 'captchac' ) );

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if ( empty( $tags ) ) {

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return $items;

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}

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$refill = array();

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foreach ( $tags as $tag ) {

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$name = $tag->name;

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$options = $tag->options;

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if ( empty( $name ) ) {

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continue;

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}

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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 = wpcf7_captcha_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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}

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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', 10, 1 );

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function wpcf7_captcha_messages( $messages ) {

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$messages = array_merge( $messages, array(

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'captcha_not_match' => array(

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'description' =>

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__( "The code that sender entered does not match the CAPTCHA", 'contact-form-7' ),

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'default' =>

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__( 'Your entered code is incorrect.', 'contact-form-7' ),

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),

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) );

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return $messages;

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}

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/* Tag generator */

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add_action( 'wpcf7_admin_init', 'wpcf7_add_tag_generator_captcha', 46, 0 );

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function wpcf7_add_tag_generator_captcha() {

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if ( ! wpcf7_use_really_simple_captcha() ) {

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return;

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}

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$tag_generator = WPCF7_TagGenerator::get_instance();

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$tag_generator->add( 'captcha',

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__( 'CAPTCHA (Really Simple CAPTCHA)', 'contact-form-7' ),

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'wpcf7_tag_generator_captcha' );

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}

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function wpcf7_tag_generator_captcha( $contact_form, $args = '' ) {

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$args = wp_parse_args( $args, array() );

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if ( ! class_exists( 'ReallySimpleCaptcha' ) ) {

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?>

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<div class="control-box">

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<fieldset>

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<legend><?php

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echo sprintf(

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/* translators: %s: link labeled 'Really Simple CAPTCHA' */

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esc_html( __( "To use CAPTCHA, you first need to install and activate %s plugin.", 'contact-form-7' ) ),

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wpcf7_link( 'https://wordpress.org/plugins/really-simple-captcha/', 'Really Simple CAPTCHA' )

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);

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?></legend>

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</fieldset>

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</div>

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<?php

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return;

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}

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$description = __( "Generate form-tags for a CAPTCHA image and corresponding response input field. For more details, see %s.", 'contact-form-7' );

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$desc_link = wpcf7_link( __( 'https://contactform7.com/captcha/', 'contact-form-7' ), __( 'CAPTCHA', 'contact-form-7' ) );

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?>

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<div class="control-box">

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<fieldset>

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<legend><?php echo sprintf( esc_html( $description ), $desc_link ); ?></legend>

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<table class="form-table">

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<tbody>

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<tr>

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<th scope="row"><label for="<?php echo esc_attr( $args['content'] . '-name' ); ?>"><?php echo esc_html( __( 'Name', 'contact-form-7' ) ); ?></label></th>

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<td><input type="text" name="name" class="tg-name oneline" id="<?php echo esc_attr( $args['content'] . '-name' ); ?>" /></td>

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</tr>

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</tbody>

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</table>

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<table class="form-table scope captchac">

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<caption><?php echo esc_html( __( "Image settings", 'contact-form-7' ) ); ?></caption>

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<tbody>

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<tr>

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<th scope="row"><label for="<?php echo esc_attr( $args['content'] . '-captchac-id' ); ?>"><?php echo esc_html( __( 'Id attribute', 'contact-form-7' ) ); ?></label></th>

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<td><input type="text" name="id" class="idvalue oneline option" id="<?php echo esc_attr( $args['content'] . '-captchac-id' ); ?>" /></td>

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</tr>

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<tr>

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<th scope="row"><label for="<?php echo esc_attr( $args['content'] . '-captchac-class' ); ?>"><?php echo esc_html( __( 'Class attribute', 'contact-form-7' ) ); ?></label></th>

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<td><input type="text" name="class" class="classvalue oneline option" id="<?php echo esc_attr( $args['content'] . '-captchac-class' ); ?>" /></td>

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</tr>

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</tbody>

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</table>

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<table class="form-table scope captchar">

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<caption><?php echo esc_html( __( "Input field settings", 'contact-form-7' ) ); ?></caption>

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<tbody>

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<tr>

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<th scope="row"><label for="<?php echo esc_attr( $args['content'] . '-captchar-id' ); ?>"><?php echo esc_html( __( 'Id attribute', 'contact-form-7' ) ); ?></label></th>

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<td><input type="text" name="id" class="idvalue oneline option" id="<?php echo esc_attr( $args['content'] . '-captchar-id' ); ?>" /></td>

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</tr>

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<tr>

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<th scope="row"><label for="<?php echo esc_attr( $args['content'] . '-captchar-class' ); ?>"><?php echo esc_html( __( 'Class attribute', 'contact-form-7' ) ); ?></label></th>

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<td><input type="text" name="class" class="classvalue oneline option" id="<?php echo esc_attr( $args['content'] . '-captchar-class' ); ?>" /></td>

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</tr>

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</tbody>

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</table>

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</fieldset>

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</div>

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<div class="insert-box">

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<input type="text" name="captcha" class="tag code" readonly="readonly" onfocus="this.select()" />

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<div class="submitbox">

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<input type="button" class="button button-primary insert-tag" value="<?php echo esc_attr( __( 'Insert Tag', 'contact-form-7' ) ); ?>" />

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</div>

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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_warnings',

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'wpcf7_captcha_display_warning_message', 10, 3 );

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function wpcf7_captcha_display_warning_message( $page, $action, $object ) {

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if ( $object instanceof WPCF7_ContactForm ) {

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$contact_form = $object;

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} else {

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return;

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}

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$has_tags = (bool) $contact_form->scan_form_tags(

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array( 'type' => array( 'captchac' ) ) );

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if ( ! $has_tags ) {

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return;

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}

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if ( ! class_exists( 'ReallySimpleCaptcha' ) ) {

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return;

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}

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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 )

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or ! wp_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.', 'contact-form-7' ), $uploads_dir );

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echo '<div class="notice notice-warning"><p>' . esc_html( $message ) . '</p></div>';

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}

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if ( ! function_exists( 'imagecreatetruecolor' )

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or ! 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.", 'contact-form-7' );

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echo '<div class="notice notice-warning"><p>' . esc_html( $message ) . '</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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static $captcha = null;

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if ( $captcha ) {

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return $captcha;

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}

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if ( class_exists( 'ReallySimpleCaptcha' ) ) {

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$captcha = new ReallySimpleCaptcha();

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} else {

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return false;

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}

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$dir = trailingslashit( wpcf7_captcha_tmp_dir() );

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$captcha->tmp_dir = $dir;

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if ( is_callable( array( $captcha, 'make_tmp_dir' ) ) ) {

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$result = $captcha->make_tmp_dir();

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if ( ! $result ) {

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return false;

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}

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return $captcha;

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}

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$result = wp_mkdir_p( $dir );

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if ( ! $result ) {

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return false;

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}

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$htaccess_file = path_join( $dir, '.htaccess' );

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if ( file_exists( $htaccess_file ) ) {

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list( $first_line_comment ) = (array) file(

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$htaccess_file,

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FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES

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);

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if ( '# Apache 2.4+' === $first_line_comment ) {

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return $captcha;

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}

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}

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if ( $handle = @fopen( $htaccess_file, 'w' ) ) {

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fwrite( $handle, "# Apache 2.4+\n" );

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fwrite( $handle, "<IfModule authz_core_module>\n" );

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fwrite( $handle, " Require all denied\n" );

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fwrite( $handle, ' <FilesMatch "^\w+\.(jpe?g|gif|png)$">' . "\n" );

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fwrite( $handle, " Require all granted\n" );

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fwrite( $handle, " </FilesMatch>\n" );

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fwrite( $handle, "</IfModule>\n" );

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fwrite( $handle, "\n" );

[441] Fix | Delete

fwrite( $handle, "# Apache 2.2\n" );

[442] Fix | Delete

fwrite( $handle, "<IfModule !authz_core_module>\n" );

[443] Fix | Delete

fwrite( $handle, " Order deny,allow\n" );

[444] Fix | Delete

fwrite( $handle, " Deny from all\n" );

[445] Fix | Delete

fwrite( $handle, ' <FilesMatch "^\w+\.(jpe?g|gif|png)$">' . "\n" );

[446] Fix | Delete

fwrite( $handle, " Allow from all\n" );

[447] Fix | Delete

fwrite( $handle, " </FilesMatch>\n" );

[448] Fix | Delete

fwrite( $handle, "</IfModule>\n" );

[449] Fix | Delete

[450] Fix | Delete

fclose( $handle );

[451] Fix | Delete

}

[452] Fix | Delete

[453] Fix | Delete

return $captcha;

[454] Fix | Delete

}

[455] Fix | Delete

[456] Fix | Delete

[457] Fix | Delete

/**

[458] Fix | Delete

* Returns the directory path for Really Simple CAPTCHA files.

[459] Fix | Delete

*

[460] Fix | Delete

* @return string Directory path.

[461] Fix | Delete

*/

[462] Fix | Delete

function wpcf7_captcha_tmp_dir() {

[463] Fix | Delete

if ( defined( 'WPCF7_CAPTCHA_TMP_DIR' ) ) {

[464] Fix | Delete

$dir = path_join( WP_CONTENT_DIR, WPCF7_CAPTCHA_TMP_DIR );

[465] Fix | Delete

wp_mkdir_p( $dir );

[466] Fix | Delete

[467] Fix | Delete

if ( wpcf7_is_file_path_in_content_dir( $dir ) ) {

[468] Fix | Delete

return $dir;

[469] Fix | Delete

}

[470] Fix | Delete

}

[471] Fix | Delete

[472] Fix | Delete

$dir = path_join( wpcf7_upload_dir( 'dir' ), 'wpcf7_captcha' );

[473] Fix | Delete

wp_mkdir_p( $dir );

[474] Fix | Delete

return $dir;

[475] Fix | Delete

}

[476] Fix | Delete

[477] Fix | Delete

[478] Fix | Delete

function wpcf7_captcha_tmp_url() {

[479] Fix | Delete

if ( defined( 'WPCF7_CAPTCHA_TMP_URL' ) ) {

[480] Fix | Delete

return WPCF7_CAPTCHA_TMP_URL;

[481] Fix | Delete

} else {

[482] Fix | Delete

return path_join( wpcf7_upload_dir( 'url' ), 'wpcf7_captcha' );

[483] Fix | Delete

}

[484] Fix | Delete

}

[485] Fix | Delete

[486] Fix | Delete

function wpcf7_captcha_url( $filename ) {

[487] Fix | Delete

$url = path_join( wpcf7_captcha_tmp_url(), $filename );

[488] Fix | Delete

[489] Fix | Delete

if ( is_ssl()

[490] Fix | Delete

and 'http:' == substr( $url, 0, 5 ) ) {

[491] Fix | Delete

$url = 'https:' . substr( $url, 5 );

[492] Fix | Delete

}

[493] Fix | Delete

[494] Fix | Delete

return apply_filters( 'wpcf7_captcha_url', sanitize_url( $url ) );

[495] Fix | Delete

}

[496] Fix | Delete

[497] Fix | Delete

function wpcf7_generate_captcha( $options = null ) {

[498] Fix | Delete

if ( ! $captcha = wpcf7_init_captcha() ) {

[499] Fix | Delete