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<?php |
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/** |
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* EEH_URL helper |
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* Helper class for URL-related PHP functions |
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* |
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* @package Event Espresso |
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* @subpackage /helper/EEH_URL.helper.php |
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* @author Brent Christensen, Michael Nelson |
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* ------------------------------------------------------------------------ |
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*/ |
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class EEH_URL |
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{ |
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/** |
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* _add_query_arg |
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* adds nonce to array of arguments then calls WP add_query_arg function |
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* |
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* @access public |
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* @param array $args |
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* @param string $url |
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* @param bool $exclude_nonce If true then the nonce will be excluded from the generated url. |
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* @return string |
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*/ |
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public static function add_query_args_and_nonce($args = array(), $url = '', $exclude_nonce = false) |
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{ |
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View Code Duplication |
if (empty($url)) { |
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$user_msg = esc_html__( |
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'An error occurred. A URL is a required parameter for the add_query_args_and_nonce method.', |
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'event_espresso' |
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); |
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$dev_msg = $user_msg . "\n" |
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. sprintf( |
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esc_html__( |
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'In order to dynamically generate nonces for your actions, you need to supply a valid URL as a second parameter for the %s method.', |
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'event_espresso' |
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), |
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__CLASS__ . '::add_query_args_and_nonce' |
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); |
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EE_Error::add_error($user_msg . '||' . $dev_msg, __FILE__, __FUNCTION__, __LINE__); |
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} |
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// check that an action exists and add nonce |
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if (! $exclude_nonce) { |
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if (isset($args['action']) && ! empty($args['action'])) { |
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$args = array_merge( |
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$args, |
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array( |
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$args['action'] . '_nonce' => wp_create_nonce($args['action'] . '_nonce') |
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) |
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); |
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} else { |
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$args = array_merge( |
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$args, |
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array( |
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'action' => 'default', 'default_nonce' => wp_create_nonce('default_nonce') |
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) |
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); |
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} |
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} |
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// finally, let's always add a return address (if present) :) |
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$args = ! empty($_REQUEST['action']) && ! isset($_REQUEST['return']) |
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? array_merge($args, array('return' => $_REQUEST['action'])) |
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: $args; |
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return add_query_arg($args, $url); |
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} |
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/** |
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* Returns whether not the remote file exists. |
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* Checking via GET because HEAD requests are blocked on some server configurations. |
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* |
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* @param string $url |
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* @param array $args the arguments that should be passed through to the wp_remote_request call. |
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* @return boolean |
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*/ |
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public static function remote_file_exists($url, $args = array()) |
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{ |
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$results = wp_remote_request( |
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$url, |
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array_merge( |
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array( |
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'method' => 'GET', |
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'redirection' => 1, |
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), |
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$args |
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) |
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); |
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if (! $results instanceof WP_Error && |
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isset($results['response']) && |
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isset($results['response']['code']) && |
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$results['response']['code'] == '200') { |
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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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* refactor_url |
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* primarily used for removing the query string from a URL |
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* |
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* @param string $url |
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* @param bool $remove_query - TRUE (default) will strip off any URL params, ie: ?this=1&that=2 |
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* @param bool $base_url_only - TRUE will only return the scheme and host with no other parameters |
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* @return string |
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*/ |
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public static function refactor_url($url = '', $remove_query = true, $base_url_only = false) |
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{ |
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// break apart incoming URL |
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$url_bits = parse_url($url); |
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// HTTP or HTTPS ? |
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$scheme = isset($url_bits['scheme']) ? $url_bits['scheme'] . '://' : 'http://'; |
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// domain |
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$host = isset($url_bits['host']) ? $url_bits['host'] : ''; |
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// if only the base URL is requested, then return that now |
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if ($base_url_only) { |
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return $scheme . $host; |
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} |
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$port = isset($url_bits['port']) ? ':' . $url_bits['port'] : ''; |
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$user = isset($url_bits['user']) ? $url_bits['user'] : ''; |
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$pass = isset($url_bits['pass']) ? ':' . $url_bits['pass'] : ''; |
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$pass = ($user || $pass) ? $pass . '@' : ''; |
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$path = isset($url_bits['path']) ? $url_bits['path'] : ''; |
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// if the query string is not required, then return what we have so far |
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if ($remove_query) { |
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return $scheme . $user . $pass . $host . $port . $path; |
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} |
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$query = isset($url_bits['query']) ? '?' . $url_bits['query'] : ''; |
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$fragment = isset($url_bits['fragment']) ? '#' . $url_bits['fragment'] : ''; |
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return $scheme . $user . $pass . $host . $port . $path . $query . $fragment; |
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} |
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/** |
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* get_query_string |
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* returns just the query string from a URL, formatted by default into an array of key value pairs |
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* |
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* @param string $url |
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* @param bool $as_array TRUE (default) will return query params as an array of key value pairs, FALSE will |
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* simply return the query string |
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* @return string|array |
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*/ |
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public static function get_query_string($url = '', $as_array = true) |
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{ |
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// decode, then break apart incoming URL |
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$url_bits = parse_url(html_entity_decode($url)); |
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// grab query string from URL |
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$query = isset($url_bits['query']) ? $url_bits['query'] : ''; |
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// if we don't want the query string formatted into an array of key => value pairs, then just return it as is |
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if (! $as_array) { |
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return $query; |
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} |
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// if no query string exists then just return an empty array now |
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if (empty($query)) { |
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return array(); |
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} |
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// empty array to hold results |
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$query_params = array(); |
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// now break apart the query string into separate params |
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$query = explode('&', $query); |
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// loop thru our query params |
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foreach ($query as $query_args) { |
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// break apart the key value pairs |
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$query_args = explode('=', $query_args); |
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// and add to our results array |
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$query_params[ $query_args[0] ] = $query_args[1]; |
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} |
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return $query_params; |
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} |
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/** |
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* prevent_prefetching |
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* |
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* @return void |
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*/ |
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public static function prevent_prefetching() |
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{ |
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// prevent browsers from prefetching of the rel='next' link, because it may contain content that interferes |
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// with the registration process |
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remove_action('wp_head', 'adjacent_posts_rel_link_wp_head'); |
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} |
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/** |
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* This generates a unique site-specific string. |
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* An example usage for this string would be to save as a unique identifier for a record in the db for usage in |
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* urls. |
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* |
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* @param string $prefix Use this to prefix the string with something. |
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* @return string |
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*/ |
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public static function generate_unique_token($prefix = '') |
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{ |
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$token = md5(uniqid() . mt_rand()); |
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return $prefix ? $prefix . '_' . $token : $token; |
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} |
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/** |
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* filter_input_server_url |
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* uses filter_input() to sanitize one of the INPUT_SERVER URL values |
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* but adds a backup in case filter_input() returns nothing, which can erringly happen on some servers |
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* |
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* @param string $server_variable |
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* @return string |
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*/ |
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public static function filter_input_server_url($server_variable = 'REQUEST_URI') |
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{ |
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$URL = ''; |
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$server_variables = array( |
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'REQUEST_URI' => 1, |
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'HTTP_HOST' => 1, |
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'PHP_SELF' => 1, |
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); |
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$server_variable = strtoupper($server_variable); |
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// whitelist INPUT_SERVER var |
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if (isset($server_variables[ $server_variable ])) { |
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$URL = filter_input(INPUT_SERVER, $server_variable, FILTER_SANITIZE_URL, FILTER_NULL_ON_FAILURE); |
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if (empty($URL)) { |
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// fallback sanitization if the above fails |
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$URL = wp_sanitize_redirect($_SERVER[ $server_variable ]); |
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} |
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} |
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return $URL; |
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} |
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/** |
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* Gets the current page's full URL. |
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* |
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* @return string |
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*/ |
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View Code Duplication |
public static function current_url() |
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{ |
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$url = ''; |
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if (isset($_SERVER['HTTP_HOST'], $_SERVER['REQUEST_URI'])) { |
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$url = is_ssl() ? 'https://' : 'http://'; |
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$url .= \EEH_URL::filter_input_server_url('HTTP_HOST'); |
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$url .= \EEH_URL::filter_input_server_url('REQUEST_URI'); |
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} |
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return $url; |
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} |
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/** |
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* Identical in functionality to EEH_current_url except it removes any provided query_parameters from it. |
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* |
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* @param array $query_parameters An array of query_parameters to remove from the current url. |
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* @since 4.9.46.rc.029 |
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* @return string |
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*/ |
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public static function current_url_without_query_paramaters(array $query_parameters) |
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{ |
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return remove_query_arg($query_parameters, EEH_URL::current_url()); |
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} |
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/** |
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* @param string $location |
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* @param int $status |
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* @param string $exit_notice |
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*/ |
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public static function safeRedirectAndExit($location, $status = 302, $exit_notice = '') |
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{ |
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EE_Error::get_notices(false, true); |
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wp_safe_redirect($location, $status); |
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exit($exit_notice); |
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} |
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/** |
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* Slugifies text for usage in a URL. |
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* |
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* Currently, this isn't just calling `sanitize_title()` on it, because that percent-encodes unicode characters, |
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* and WordPress chokes on them when used as CPT and custom taxonomy slugs. |
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* |
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* @since $VID:$ |
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* @param string $text |
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* @param string $fallback |
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* @return string which can be used in a URL |
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*/ |
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public static function slugify($text, $fallback) |
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{ |
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// url decode after sanitizing title to restore unicode characters, |
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// see https://github.com/eventespresso/event-espresso-core/issues/575 |
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return urldecode( |
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sanitize_title( |
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$text, |
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$fallback |
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) |
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); |
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} |
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} |
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