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<?php

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/**

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* Returns path to a plugin file.

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* @param string $path File path relative to the plugin root directory.

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* @return string Absolute file path.

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function wpcf7_plugin_path( $path = '' ) {

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return path_join( WPCF7_PLUGIN_DIR, trim( $path, '/' ) );

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}

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/**

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* Returns the URL to a plugin file.

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* @param string $path File path relative to the plugin root directory.

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* @return string URL.

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function wpcf7_plugin_url( $path = '' ) {

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$url = plugins_url( $path, WPCF7_PLUGIN );

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if ( is_ssl()

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

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

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}

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return $url;

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}

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/**

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* Include a file under WPCF7_PLUGIN_MODULES_DIR.

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* @param string $path File path relative to the module dir.

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* @return bool True on success, false on failure.

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function wpcf7_include_module_file( $path ) {

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$dir = WPCF7_PLUGIN_MODULES_DIR;

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if ( empty( $dir ) or ! is_dir( $dir ) ) {

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return false;

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}

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$path = path_join( $dir, ltrim( $path, '/' ) );

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if ( file_exists( $path ) ) {

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include_once $path;

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return true;

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}

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return false;

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}

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/**

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* Retrieves uploads directory information.

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* @param string|bool $type Optional. Type of output. Default false.

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* @return array|string Information about the upload directory.

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function wpcf7_upload_dir( $type = false ) {

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$uploads = wp_get_upload_dir();

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$uploads = apply_filters( 'wpcf7_upload_dir', array(

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'dir' => $uploads['basedir'],

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'url' => $uploads['baseurl'],

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) );

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if ( 'dir' == $type ) {

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return $uploads['dir'];

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} if ( 'url' == $type ) {

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return $uploads['url'];

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}

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return $uploads;

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}

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/**

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* Verifies that a correct security nonce was used with time limit.

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* @param string $nonce Nonce value that was used for verification.

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* @param string $action Optional. Context to what is taking place.

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* Default 'wp_rest'.

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* @return int|bool 1 if the nonce is generated between 0-12 hours ago,

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* 2 if the nonce is generated between 12-24 hours ago.

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* False if the nonce is invalid.

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function wpcf7_verify_nonce( $nonce, $action = 'wp_rest' ) {

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return wp_verify_nonce( $nonce, $action );

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}

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/**

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* Creates a cryptographic token tied to a specific action, user, user session,

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* and window of time.

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* @param string $action Optional. Context to what is taking place.

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* Default 'wp_rest'.

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* @return string The token.

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function wpcf7_create_nonce( $action = 'wp_rest' ) {

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return wp_create_nonce( $action );

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}

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/**

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* Converts multi-dimensional array to a flat array.

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* @param mixed $input Array or item of array.

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* @return array Flatten array.

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function wpcf7_array_flatten( $input ) {

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if ( ! is_array( $input ) ) {

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return array( $input );

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}

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$output = array();

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foreach ( $input as $value ) {

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$output = array_merge( $output, wpcf7_array_flatten( $value ) );

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}

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return $output;

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}

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/**

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* Excludes unset or blank text values from the given array.

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* @param array $input The array.

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* @return array Array without blank text values.

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function wpcf7_exclude_blank( $input ) {

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$output = array_filter( $input,

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static function ( $i ) {

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return isset( $i ) && '' !== $i;

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}

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);

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return array_values( $output );

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}

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/**

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* Creates a comma-separated list from a multi-dimensional array.

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* @param mixed $input Array or item of array.

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* @param string|array $options Optional. Output options.

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* @return string Comma-separated list.

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function wpcf7_flat_join( $input, $options = '' ) {

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$options = wp_parse_args( $options, array(

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'separator' => ', ',

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) );

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$input = wpcf7_array_flatten( $input );

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$output = array();

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foreach ( (array) $input as $value ) {

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if ( is_scalar( $value ) ) {

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$output[] = trim( (string) $value );

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}

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}

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return implode( $options['separator'], $output );

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}

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/**

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* Returns true if HTML5 is supported.

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function wpcf7_support_html5() {

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return (bool) wpcf7_apply_filters_deprecated(

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'wpcf7_support_html5',

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array( true ),

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'5.6',

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);

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}

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/**

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* Returns true if HTML5 fallback is active.

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function wpcf7_support_html5_fallback() {

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return (bool) apply_filters( 'wpcf7_support_html5_fallback', false );

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}

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/**

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* Returns true if the Really Simple CAPTCHA plugin is used for contact forms.

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function wpcf7_use_really_simple_captcha() {

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return apply_filters( 'wpcf7_use_really_simple_captcha',

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WPCF7_USE_REALLY_SIMPLE_CAPTCHA

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);

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}

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/**

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* Returns true if config validation is active.

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function wpcf7_validate_configuration() {

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return apply_filters( 'wpcf7_validate_configuration',

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WPCF7_VALIDATE_CONFIGURATION

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);

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}

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/**

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* Returns true if wpcf7_autop() is applied.

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function wpcf7_autop_or_not( $options = '' ) {

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$options = wp_parse_args( $options, array(

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'for' => 'form',

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) );

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return (bool) apply_filters( 'wpcf7_autop_or_not', WPCF7_AUTOP, $options );

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}

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/**

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* Returns true if JavaScript for this plugin is loaded.

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function wpcf7_load_js() {

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return apply_filters( 'wpcf7_load_js', WPCF7_LOAD_JS );

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}

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/**

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* Returns true if CSS for this plugin is loaded.

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function wpcf7_load_css() {

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return apply_filters( 'wpcf7_load_css', WPCF7_LOAD_CSS );

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}

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/**

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* Builds an HTML anchor element.

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* @param string $url Link URL.

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* @param string $anchor_text Anchor label text.

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* @param string|array $atts Optional. HTML attributes.

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* @return string Formatted anchor element.

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function wpcf7_link( $url, $anchor_text, $atts = '' ) {

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$atts = wp_parse_args( $atts, array(

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'id' => null,

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'class' => null,

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) );

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$atts = array_merge( $atts, array(

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'href' => esc_url( $url ),

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) );

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return sprintf(

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'<a %1$s>%2$s</a>',

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wpcf7_format_atts( $atts ),

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esc_html( $anchor_text )

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);

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}

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/**

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* Returns the current request URL.

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function wpcf7_get_request_uri() {

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static $request_uri = '';

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if ( empty( $request_uri ) ) {

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$request_uri = add_query_arg( array() );

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$request_uri = '/' . ltrim( $request_uri, '/' );

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}

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return sanitize_url( $request_uri );

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}

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/**

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* Registers post types used for this plugin.

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function wpcf7_register_post_types() {

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if ( class_exists( 'WPCF7_ContactForm' ) ) {

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WPCF7_ContactForm::register_post_type();

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return true;

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} else {

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return false;

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}

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}

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/**

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* Returns the version string of this plugin.

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* @param string|array $options Optional. Output options.

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* @return string Version string.

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function wpcf7_version( $options = '' ) {

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$options = wp_parse_args( $options, array(

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'limit' => -1,

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'only_major' => false,

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) );

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if ( $options['only_major'] ) {

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$options['limit'] = 2;

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}

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$options['limit'] = (int) $options['limit'];

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$ver = WPCF7_VERSION;

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$ver = strtr( $ver, '_-+', '...' );

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$ver = preg_replace( '/[^0-9.]+/', ".$0.", $ver );

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$ver = preg_replace( '/[.]+/', ".", $ver );

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$ver = trim( $ver, '.' );

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$ver = explode( '.', $ver );

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if ( -1 < $options['limit'] ) {

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$ver = array_slice( $ver, 0, $options['limit'] );

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}

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$ver = implode( '.', $ver );

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return $ver;

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}

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/**

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* Returns array entries that match the given version.

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* @param string $version The version to search for.

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* @param array $input Search target array.

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* @return array|bool Array of matched entries. False on failure.

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function wpcf7_version_grep( $version, array $input ) {

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$pattern = '/^' . preg_quote( (string) $version, '/' ) . '(?:\.|$)/';

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return preg_grep( $pattern, $input );

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}

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/**

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* Returns an enctype attribute value.

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* @param string $enctype Enctype value.

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* @return string Enctype value. Empty if not a valid enctype.

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function wpcf7_enctype_value( $enctype ) {

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$enctype = trim( $enctype );

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if ( empty( $enctype ) ) {

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return '';

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}

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$valid_enctypes = array(

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'application/x-www-form-urlencoded',

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'multipart/form-data',

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'text/plain',

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);

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if ( in_array( $enctype, $valid_enctypes ) ) {

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return $enctype;

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}

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$pattern = '%^enctype="(' . implode( '|', $valid_enctypes ) . ')"$%';

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if ( preg_match( $pattern, $enctype, $matches ) ) {

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return $matches[1]; // for back-compat

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}

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return '';

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}

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/**

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* Removes directory recursively.

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* @param string $dir Directory path.

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* @return bool True on success, false on failure.

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function wpcf7_rmdir_p( $dir ) {

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if ( is_file( $dir ) ) {

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$file = $dir;

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if ( @unlink( $file ) ) {

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return true;

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}

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$stat = stat( $file );

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if ( @chmod( $file, $stat['mode'] | 0200 ) ) { // add write for owner

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if ( @unlink( $file ) ) {

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return true;

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}

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@chmod( $file, $stat['mode'] );

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}

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return false;

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}

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if ( ! is_dir( $dir ) ) {

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return false;

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}

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if ( $handle = opendir( $dir ) ) {

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while ( false !== ( $file = readdir( $handle ) ) ) {

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if ( $file == "."

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or $file == ".." ) {

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continue;

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}

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wpcf7_rmdir_p( path_join( $dir, $file ) );

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}

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closedir( $handle );

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}

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if ( false !== ( $files = scandir( $dir ) )

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and ! array_diff( $files, array( '.', '..' ) ) ) {

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return rmdir( $dir );

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}

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return false;

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}

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/**

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* Builds a URL-encoded query string.

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* @link https://developer.wordpress.org/reference/functions/_http_build_query/

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* @param array $data URL query parameters.

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* @param string $key Optional. If specified, used to prefix key name.

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* @return string Query string.

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function wpcf7_build_query( $data, $key = '' ) {

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$sep = '&';

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$ret = array();

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foreach ( (array) $data as $k => $v ) {

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$k = urlencode( $k );

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if ( ! empty( $key ) ) {

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$k = $key . '%5B' . $k . '%5D';

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}

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if ( null === $v ) {

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continue;

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} elseif ( false === $v ) {

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$v = '0';

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}

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if ( is_array( $v ) or is_object( $v ) ) {

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array_push( $ret, wpcf7_build_query( $v, $k ) );

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} else {

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array_push( $ret, $k . '=' . urlencode( $v ) );

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}

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}

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return implode( $sep, $ret );

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}

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/**

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* Returns the number of code units in a string.

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* @link http://www.w3.org/TR/html5/infrastructure.html#code-unit-length

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* @param string $text Input string.

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* @return int|bool The number of code units, or false if

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* mb_convert_encoding is not available.

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function wpcf7_count_code_units( $text ) {

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static $use_mb = null;

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if ( is_null( $use_mb ) ) {

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$use_mb = function_exists( 'mb_convert_encoding' );

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}

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if ( ! $use_mb ) {

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return false;

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}

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$text = (string) $text;

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$text = str_replace( "\r\n", "\n", $text );

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$encoding = mb_detect_encoding( $text, mb_detect_order(), true );

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if ( $encoding ) {

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$text = mb_convert_encoding( $text, 'UTF-16', $encoding );

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} else {

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$text = mb_convert_encoding( $text, 'UTF-16', 'UTF-8' );

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}

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$byte_count = mb_strlen( $text, '8bit' );

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return floor( $byte_count / 2 );

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}

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