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<?php /** * Checks whether a string is a valid NAME token. * * ID and NAME tokens must begin with a letter ([A-Za-z]) * and may be followed by any number of letters, digits ([0-9]), * hyphens ("-"), underscores ("_"), colons (":"), and periods ("."). * * @link http://www.w3.org/TR/html401/types.html#h-6.2 * * @return bool True if it is a valid name, false if not. */ function wpcf7_is_name( $text ) { return preg_match( '/^[A-Za-z][-A-Za-z0-9_:.]*$/', $text ); } /** * Checks whether the given text is a well-formed email address. */ function wpcf7_is_email( $text ) { $result = is_email( $text ); return apply_filters( 'wpcf7_is_email', $result, $text ); } /** * Checks whether the given text is a well-formed URL. */ function wpcf7_is_url( $text ) { $scheme = wp_parse_url( $text, PHP_URL_SCHEME ); $result = $scheme && in_array( $scheme, wp_allowed_protocols(), true ); return apply_filters( 'wpcf7_is_url', $result, $text ); } /** * Checks whether the given text is a well-formed telephone number. */ function wpcf7_is_tel( $text ) { $text = preg_replace( '/[#*].*$/', '', $text ); // Remove extension $text = preg_replace( '%[()/.*#\s-]+%', '', $text ); $is_international = false || str_starts_with( $text, '+' ) || str_starts_with( $text, '00' ); if ( $is_international ) { $text = '+' . preg_replace( '/^[+0]+/', '', $text ); } $result = true; if ( ! preg_match( '/^[+]?[0-9]+$/', $text ) ) { $result = false; } if ( ! ( 6 < strlen( $text ) and strlen( $text ) < 16 ) ) { $result = false; } return apply_filters( 'wpcf7_is_tel', $result, $text ); } /** * Checks whether the given text is a well-formed number. * * @link https://html.spec.whatwg.org/multipage/input.html#number-state-(type=number) */ function wpcf7_is_number( $text ) { $result = false; $patterns = array( '/^[-]?[0-9]+(?:[eE][+-]?[0-9]+)?$/', '/^[-]?(?:[0-9]+)?[.][0-9]+(?:[eE][+-]?[0-9]+)?$/', ); foreach ( $patterns as $pattern ) { if ( preg_match( $pattern, $text ) ) { $result = true; break; } } return apply_filters( 'wpcf7_is_number', $result, $text ); } /** * Checks whether the given text is a valid date. * * @link https://html.spec.whatwg.org/multipage/input.html#date-state-(type=date) */ function wpcf7_is_date( $text ) { $result = preg_match( '/^([0-9]{4,})-([0-9]{2})-([0-9]{2})$/', $text, $matches ); if ( $result ) { $result = checkdate( $matches[2], $matches[3], $matches[1] ); } return apply_filters( 'wpcf7_is_date', $result, $text ); } /** * Checks whether the given text is a valid time. * * @link https://html.spec.whatwg.org/multipage/input.html#time-state-(type=time) */ function wpcf7_is_time( $text ) { $result = preg_match( '/^([0-9]{2})\:([0-9]{2})(?:\:([0-9]{2}))?$/', $text, $matches ); if ( $result ) { $hour = (int) $matches[1]; $minute = (int) $matches[2]; $second = empty( $matches[3] ) ? 0 : (int) $matches[3]; $result = 0 <= $hour && $hour <= 23 && 0 <= $minute && $minute <= 59 && 0 <= $second && $second <= 59; } return apply_filters( 'wpcf7_is_time', $result, $text ); } /** * Checks whether the given text is a well-formed mailbox list. * * @param string|array $mailbox_list The subject to be checked. * Comma-separated string or an array of mailboxes. * @return array|bool Array of email addresses if all items are well-formed * mailbox, false if not. */ function wpcf7_is_mailbox_list( $mailbox_list ) { if ( ! is_array( $mailbox_list ) ) { $mailbox_text = (string) $mailbox_list; $mailbox_text = preg_replace( '/\\\\(?:\"|\')/', 'esc-quote', $mailbox_text ); $mailbox_text = preg_replace( '/(?:\".*?\"|\'.*?\')/', 'quoted-string', $mailbox_text ); $mailbox_list = explode( ',', $mailbox_text ); } $addresses = array(); foreach ( $mailbox_list as $mailbox ) { if ( ! is_string( $mailbox ) ) { return false; } $mailbox = trim( $mailbox ); if ( '' === $mailbox ) { continue; } if ( preg_match( '/<(.+)>$/', $mailbox, $matches ) ) { $addr_spec = $matches[1]; } else { $addr_spec = $mailbox; } if ( ! wpcf7_is_email( $addr_spec ) ) { return false; } $addresses[] = $addr_spec; } return $addresses; } /** * Checks whether an email address belongs to a domain. * * @param string $email A mailbox or a comma-separated list of mailboxes. * @param string $domain Internet domain name. * @return bool True if all of the email addresses belong to the domain, * false if not. */ function wpcf7_is_email_in_domain( $email, $domain ) { $email_list = wpcf7_is_mailbox_list( $email ); if ( false === $email_list ) { return false; } $domain = strtolower( $domain ); foreach ( $email_list as $email ) { $email_domain = substr( $email, strrpos( $email, '@' ) + 1 ); $email_domain = strtolower( $email_domain ); $domain_parts = explode( '.', $domain ); do { $site_domain = implode( '.', $domain_parts ); if ( $site_domain == $email_domain ) { continue 2; } array_shift( $domain_parts ); } while ( $domain_parts ); return false; } return true; } /** * Checks whether an email address belongs to the site domain. */ function wpcf7_is_email_in_site_domain( $email ) { if ( wpcf7_is_localhost() ) { return true; } $homes = array( home_url(), network_home_url(), ); $homes = array_unique( $homes ); foreach ( $homes as $home ) { $sitename = wp_parse_url( $home, PHP_URL_HOST ); if ( WP_Http::is_ip_address( $sitename ) ) { return true; } if ( wpcf7_is_email_in_domain( $email, $sitename ) ) { return true; } } return false; } /** * Verifies that a given file path is under the directories that WordPress * manages for user contents. * * Returns false if the file at the given path does not exist yet. * * @param string $path A file path. * @return bool True if the path is under the content directories, * false otherwise. */ function wpcf7_is_file_path_in_content_dir( $path ) { if ( ! is_string( $path ) or '' === $path ) { return false; } $callback = static function ( $path, $dir ) { if ( $real_path = realpath( $path ) ) { $path = $real_path; } else { return false; } if ( $real_dir = realpath( $dir ) ) { $dir = trailingslashit( $real_dir ); } else { return false; } return str_starts_with( wp_normalize_path( $path ), wp_normalize_path( $dir ) ); }; if ( call_user_func( $callback, $path, WP_CONTENT_DIR ) ) { return true; } if ( defined( 'UPLOADS' ) and call_user_func( $callback, $path, ABSPATH . UPLOADS ) ) { return true; } if ( defined( 'WP_TEMP_DIR' ) and call_user_func( $callback, $path, WP_TEMP_DIR ) ) { return true; } return false; }
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