<?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 (".").
*
* @see 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( $string ) {
return preg_match( '/^[A-Za-z][-A-Za-z0-9_:.]*$/', $string );
}
function wpcf7_is_email( $email ) {
$result = is_email( $email );
return apply_filters( 'wpcf7_is_email', $result, $email );
}
function wpcf7_is_url( $url ) {
$result = ( false !== filter_var( $url, FILTER_VALIDATE_URL ) );
return apply_filters( 'wpcf7_is_url', $result, $url );
}
function wpcf7_is_tel( $tel ) {
$pattern = '%^[+]?' // + sign
. '(?:\([0-9]+\)|[0-9]+)' // (1234) or 1234
. '(?:[/ -]*' // delimiter
. '(?:\([0-9]+\)|[0-9]+)' // (1234) or 1234
. ')*$%';
$result = preg_match( $pattern, trim( $tel ) );
return apply_filters( 'wpcf7_is_tel', $result, $tel );
}
function wpcf7_is_number( $number ) {
$result = is_numeric( $number );
return apply_filters( 'wpcf7_is_number', $result, $number );
}
function wpcf7_is_date( $date ) {
$result = preg_match( '/^([0-9]{4,})-([0-9]{2})-([0-9]{2})$/', $date, $matches );
if ( $result ) {
$result = checkdate( $matches[2], $matches[3], $matches[1] );
}
return apply_filters( 'wpcf7_is_date', $result, $date );
}
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;
}
function wpcf7_is_email_in_domain( $email, $domain ) {
$email_list = wpcf7_is_mailbox_list( $email );
$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;
}
function wpcf7_is_email_in_site_domain( $email ) {
if ( wpcf7_is_localhost() ) {
return true;
}
$site_domain = strtolower( $_SERVER['SERVER_NAME'] );
if ( preg_match( '/^[0-9.]+$/', $site_domain ) ) { // 123.456.789.012
return true;
}
if ( wpcf7_is_email_in_domain( $email, $site_domain ) ) {
return true;
}
$home_url = home_url();
// for interoperability with WordPress MU Domain Mapping plugin
if ( is_multisite()
and function_exists( 'domain_mapping_siteurl' ) ) {
$domain_mapping_siteurl = domain_mapping_siteurl( false );
if ( $domain_mapping_siteurl ) {
$home_url = $domain_mapping_siteurl;
}
}
if ( preg_match( '%^https?://([^/]+)%', $home_url, $matches ) ) {
$site_domain = strtolower( $matches[1] );
if ( $site_domain != strtolower( $_SERVER['SERVER_NAME'] )
and wpcf7_is_email_in_domain( $email, $site_domain ) ) {
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 doesn't 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 ( $real_path = realpath( $path ) ) {
$path = $real_path;
} else {
return false;
}
if ( 0 === strpos( $path, realpath( WP_CONTENT_DIR ) ) ) {
return true;
}
if ( defined( 'UPLOADS' )
and 0 === strpos( $path, realpath( ABSPATH . UPLOADS ) ) ) {
return true;
}
return false;
}