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http_build_url.php
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http_build_url.php
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<?php
/**
* PHP fallback function http_build_url().
* For servers without pecl_http package installed.
*
* Based on the original C code from pecl_http-1.7.6
* @link http://svn.php.net/viewvc/pecl/http/tags/RELEASE_1_7_6/php_http_url_api.h?view=markup
* @link http://svn.php.net/viewvc/pecl/http/tags/RELEASE_1_7_6/http_url_api.c?view=markup
*
* Some snippets by Sébastien Corne have been used.
* @link https://github.com/Seebz/Snippets/blob/master/php/http_build_url.php
*
* @version 1.7.6.3
* @author Ivan Tcholakov <ivantcholakov@gmail.com>, 2014-2015
* @license The MIT License, http://opensource.org/licenses/MIT
*
* Code repository:
* @link https://github.com/ivantcholakov/http_build_url
*
* Usage:
* Place this file on a suitable directory of your PHP system.
* Inside a common bootstrap file within your system insert the following piece of code:
*
* if (!function_exists('http_build_str') || !function_exists('http_build_url')) {
* require dirname(__FILE__).'/write/your/relative/path/here/http_build_url.php';
* }
*
* After that, the functions http_build_url() and http_build_str() would be callable.
* A quick test:
*
* echo http_build_url();
*
* An important note: Don't use host autodetection (or more generally base url autodetection)
* implemented by this function, it relies first on $_SERVER['HTTP_HOST'].
* See http://carlos.bueno.org/2008/06/host-header-injection.html
*/
if (!function_exists('http_build_url')) {
/**
* Based on the original C code from pecl_http-1.7.6:
* @link http://svn.php.net/viewvc/pecl/http/tags/RELEASE_1_7_6/php_http_url_api.h?view=markup
* @link http://svn.php.net/viewvc/pecl/http/tags/RELEASE_1_7_6/http_url_api.c?view=markup
*/
define('HTTP_URL_REPLACE', 0); // Replace every part of the first URL when there is one of the second URL.
define('HTTP_URL_JOIN_PATH', 1); // Join relative paths.
define('HTTP_URL_JOIN_QUERY', 2); // Join query strings.
define('HTTP_URL_STRIP_USER', 4); // Strip any user authentication information.
define('HTTP_URL_STRIP_PASS', 8); // Strip any password authentication information.
define('HTTP_URL_STRIP_AUTH', 12); // Strip any authentication information.
define('HTTP_URL_STRIP_PORT', 32); // Strip explicit port numbers.
define('HTTP_URL_STRIP_PATH', 64); // Strip complete path.
define('HTTP_URL_STRIP_QUERY', 128); // Strip query string.
define('HTTP_URL_STRIP_FRAGMENT', 256); // Strip any fragments (#identifier).
define('HTTP_URL_STRIP_ALL', 492); // Strip anything but scheme and host.
/**
* Build a URL (PECL pecl_http >= 0.21.0)
* @link http://php.net/manual/en/function.http-build-url.php
* @param mixed $url (Part(s) of) An URL in form of a string or associative array like parse_url() returns.
* @param mixed $parts Same as the first argument.
* @param integer $flags A bitmask of binary or'ed HTTP_URL constants; HTTP_URL_REPLACE is the default.
* @param array $new_url If set, it will be filled with the parts of the composed url like parse_url() would return.
* @return string Returns the new URL as string on success or FALSE on failure.
*/
function http_build_url($url = array(), $parts = array(), $flags = HTTP_URL_REPLACE, &$new_url = null) {
// Initialization
static $all_keys = array('scheme', 'user', 'pass', 'host', 'port', 'path', 'query', 'fragment');
static $all_keys_flipped;
static $server_https;
static $default_host;
static $request_uri;
static $request_uri_no_query;
static $request_uri_path;
if (!isset($all_keys_flipped)) {
$all_keys_flipped = array_flip($all_keys);
}
if (!isset($server_https)) {
$server_https = !empty($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) == 'on';
}
if (!isset($default_host)) {
// Avoid this autodetection, it is copy-exact from C code, but $_SERVER['HTTP_HOST'] is vulnerable.
$default_host =
isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST']
: (isset($_SERVER['SERVER_NAME']) ? $_SERVER['SERVER_NAME']: '');
if ($default_host == '') {
$default_host = function_exists('gethostname') ? gethostname() : php_uname('n');
}
}
if (!isset($request_uri)) {
if (isset($_SERVER['REQUEST_URI'])) {
$request_uri = $_SERVER['REQUEST_URI'];
} else {
$request_uri = '/';
}
}
if (!isset($request_uri_no_query)) {
$request_uri_no_query = preg_replace('~^([^\?]*).*$~', '$1', $request_uri);
}
if (!isset($request_uri_path)) {
$request_uri_path = substr($request_uri_no_query, 0, strrpos($request_uri_no_query, '/') + 1);
}
// Translate the flags from the single input parameter.
$JOIN_PATH = (($flags | HTTP_URL_JOIN_PATH) == $flags);
$JOIN_QUERY = (($flags | HTTP_URL_JOIN_QUERY) == $flags);
$STRIP_USER = (($flags | HTTP_URL_STRIP_USER) == $flags);
$STRIP_PASS = (($flags | HTTP_URL_STRIP_PASS) == $flags);
$STRIP_PORT = (($flags | HTTP_URL_STRIP_PORT) == $flags);
$STRIP_PATH = (($flags | HTTP_URL_STRIP_PATH) == $flags);
$STRIP_QUERY = (($flags | HTTP_URL_STRIP_QUERY) == $flags);
$STRIP_FRAGMENT = (($flags | HTTP_URL_STRIP_FRAGMENT) == $flags);
// Parse and validate the input URLs.
if (!is_array($url)) {
$url = parse_url($url);
}
if (!is_array($parts)) {
$parts = parse_url($parts);
}
$url = array_intersect_key($url, $all_keys_flipped);
$parts = array_intersect_key($parts, $all_keys_flipped);
// Unfortunately the 'query' part can not be an array or object type.
if (isset($url['query']) && !is_string($url['query'])) {
unset($url['query']);
}
// Unfortunately the 'query' part can not be an array or object type.
if (isset($parts['query']) && !is_string($parts['query'])) {
unset($parts['query']);
}
foreach ($all_keys as $key) {
if ($key == 'port') {
if (isset($url[$key])) {
$url[$key] = (int) $url[$key];
if ($url[$key] <= 0 || $url[$key] >= 65535) {
unset($url[$key]);
}
}
if (isset($parts[$key])) {
$parts[$key] = (int) $parts[$key];
if ($parts[$key] <= 0 || $parts[$key] >= 65535) {
unset($parts[$key]);
}
}
} else {
if (isset($url[$key])) {
if (is_array($url[$key])) {
if (empty($url[$key])) {
unset($url[$key]);
}
} else {
$url[$key] = (string) $url[$key];
if ($url[$key] == '') {
unset($url[$key]);
}
}
}
if (isset($parts[$key])) {
if (is_array($parts[$key])) {
if (empty($parts[$key])) {
unset($parts[$key]);
}
} else {
$parts[$key] = (string) $parts[$key];
if ($parts[$key] == '') {
unset($parts[$key]);
}
}
}
}
}
// Start building the result.
// Port
if ($STRIP_PORT) {
if (isset($url['port'])) {
unset($url['port']);
}
} else {
if (isset($parts['port'])) {
$url['port'] = $parts['port'];
}
}
// User
if ($STRIP_USER) {
if (isset($url['user'])) {
unset($url['user']);
}
} else {
if (isset($parts['user'])) {
$url['user'] = $parts['user'];
}
}
// Password
if ($STRIP_PASS || !isset($url['user'])) {
if (isset($url['pass'])) {
unset($url['pass']);
}
} else {
if (isset($parts['pass'])) {
$url['pass'] = $parts['pass'];
}
}
// Scheme
if (isset($parts['scheme'])) {
$url['scheme'] = $parts['scheme'];
}
// Host
if (isset($parts['host'])) {
$url['host'] = $parts['host'];
}
// Path
if ($STRIP_PATH) {
if (isset($url['path'])) {
unset($url['path']);
}
} else {
if ($JOIN_PATH && isset($parts['path']) && isset($url['path']) && substr($parts['path'], 0, 1) != '/') {
if (substr($url['path'], -1, 1) != '/') {
$base_path = str_replace('\\', '/', dirname($url['path']));
} else {
$base_path = $url['path'];
}
if (substr($base_path, -1, 1) != '/') {
$base_path .= '/';
}
$url['path'] = $base_path.$parts['path'];
} else {
if (isset($parts['path'])) {
$url['path'] = $parts['path'];
}
}
}
// Query
if ($STRIP_QUERY) {
if (isset($url['query'])) {
unset($url['query']);
}
} else {
if ($JOIN_QUERY && isset($url['query']) && isset($parts['query'])) {
// From an original snippet by Sébastien Corne.
//---------------------------------------------------------------------
$u_query = $url['query'];
$p_query = $parts['query'];
if (!is_array($u_query)) parse_str($u_query, $u_query);
if (!is_array($p_query)) parse_str($p_query, $p_query);
$u_query = http_build_str($u_query);
$p_query = http_build_str($p_query);
$u_query = str_replace(array('[', '%5B'), '{{{', $u_query);
$u_query = str_replace(array(']', '%5D'), '}}}', $u_query);
$p_query = str_replace(array('[', '%5B'), '{{{', $p_query);
$p_query = str_replace(array(']', '%5D'), '}}}', $p_query);
parse_str($u_query, $u_query);
parse_str($p_query, $p_query);
$query = http_build_str(array_merge($u_query, $p_query));
$query = str_replace(array('{{{', '%7B%7B%7B'), '%5B', $query);
$query = str_replace(array('}}}', '%7D%7D%7D'), '%5D', $query);
parse_str($query, $query);
//---------------------------------------------------------------------
} else {
if (isset($parts['query'])) {
$query = $parts['query'];
}
}
if (isset($query)) {
if (is_array($query)) {
$query = http_build_str($query);
}
$url['query'] = $query;
}
}
if (isset($url['query']) && is_array($url['query'])) {
$url['query'] = http_build_str($url['query']);
}
// Fragment
if ($STRIP_FRAGMENT) {
if (isset($url['fragment'])) {
unset($url['fragment']);
}
} else {
if (isset($parts['fragment'])) {
$url['fragment'] = $parts['fragment'];
}
}
// Ensure scheme presence.
if (!isset($url['scheme'])) {
if ($server_https) {
$url['scheme'] = 'https';
} elseif (isset($url['port'])) {
if ($scheme = getservbyport($url['port'], 'tcp')) {
$url['scheme'] = $scheme;
} else {
$url['scheme'] = 'http';
}
} else {
$url['scheme'] = 'http';
}
}
// Ensure host presence.
if (!isset($url['host'])) {
$url['host'] = $default_host;
}
// Hide standard ports.
// http://www.iana.org/assignments/port-numbers
if (isset($url['port'])) {
if ((int) getservbyname($url['scheme'], 'tcp') == $url['port']) {
unset($url['port']);
}
}
// Ensure path presence.
if ($STRIP_PATH) {
$url['path'] = '';
} else {
if (!isset($url['path'])) {
$url['path'] = $request_uri_no_query;
} elseif (substr($url['path'], 0, 1) != '/') {
// A relative path, deal with it.
$url['path'] = $request_uri_path.$url['path'];
}
}
// Canonize the result path.
if (strpos($url['path'], './') !== false) {
// From an original snippet by Sébastien Corne.
//---------------------------------------------------------------------
$path = explode('/', $url['path']);
$k_stack = array();
foreach ($path as $k => $v) {
if ($v == '..') { // /../
if ($k_stack) {
$k_parent = array_pop($k_stack);
unset($path[$k_parent]);
}
unset($path[$k]);
} elseif ($v == '.') { // /./
unset($path[$k]);
} else {
$k_stack[] = $k;
}
}
$url['path'] = implode('/', $path);
//---------------------------------------------------------------------
}
$url['path'] = '/'.ltrim($url['path'], '/');
// The result as an array type is ready.
$new_url = $url;
// Build the result string.
$result = $url['scheme'].'://';
if (isset($url['user'])) {
$result .= $url['user'].(isset($url['pass']) ? ':'.$url['pass'] : '').'@';
}
$result .= $url['host'];
if (isset($url['port'])) {
$result .= ':'.$url['port'];
}
$result .= $url['path'];
if (isset($url['query'])) {
$result .= '?'.$url['query'];
}
if (isset($new_url['fragment'])) {
$result .= '#'.$url['fragment'];
}
return $result;
}
}
if (!function_exists('http_build_str')) {
/**
* Build query string (PECL pecl_http >= 0.23.0)
* @link http://php.net/manual/en/function.http-build-str.php
* @param array $query Associative array of query string parameters.
* @param string $prefix Top level prefix.
* @param string $arg_separator Argument separator to use (by default the INI setting arg_separator.output will be used, or "&" if neither is set.
* @return string Returns the built query as string on success or FALSE on failure.
* A snippet from Sébastien Corne.
*/
function http_build_str(array $query, $prefix = '', $arg_separator = null) {
if (is_null($arg_separator)) {
$arg_separator = ini_get('arg_separator.output');
}
$result = array();
foreach ($query as $k => $v) {
$key = $prefix ? "{$prefix}%5B{$k}%5D" : $k;
if (is_array($v)) {
$result[] = call_user_func(__FUNCTION__, $v, $key, $arg_separator);
} else {
$result[] = $key.'='.urlencode($v);
}
}
return implode($arg_separator, $result);
}
}