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absolute-to-relative-urls.php
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<?php /* Absolute-to-Relative URLs 0.3.4 <http://www.svachon.com/blog/absolute-to-relative-urls/> A class for use in shortening URL links. */ class Absolute_to_Relative_URLs { //protected static $_instance; protected $custom_ports; protected $site_port_is_default; protected $site_url; /* $custom_site_url :: should be a valid URL, with scheme and host $custom_ports :: e.g., array('ssh'=>22) */ public function __construct($custom_site_url='', $custom_ports=array()) { $this->custom_ports = $custom_ports; $this->get_site_url($custom_site_url); if ($this->site_url === false) { trigger_error('Invalid site URL'); } } /* Initialize class for absolute_to_relative_url() Nice idea, BUT slower than using a global variable */ /*public static function instance() { if (self::$_instance === null) { self::$_instance = new Absolute_to_Relative_URLs(); } return self::$_instance; }*/ protected function build_url($url, $output_type) { $has_fragment = isset($url['fragment']); $has_resource = isset($url['resource']); $has_query = isset($url['query']); if ( isset($url['scheme']) ) { $first_half = $url['scheme'] . ':'; } else { $first_half = ''; } if ( isset($url['host']) ) { $first_half .= '//'; $user_or_pass = false; if ( isset($url['user']) ) { $first_half .= $url['user']; $user_or_pass = true; } if ( isset($url['pass']) ) { $first_half .= ':' . $url['pass']; $user_or_pass = true; } if ($user_or_pass) { $first_half .= '@'; } $first_half .= $url['host']; if ( isset($url['port']) ) { $first_half .= ':' . $url['port']; } $second_half = $url['path']; } else { if ($output_type===1 || $output_type===2) { $absolute_path = $url['path']; $relative_path = (isset($url['path_relative'])) ? $url['path_relative'] : false; if ($relative_path !== false) { if ($output_type === 2) { $second_half = (strlen($relative_path) <= strlen($absolute_path)) ? $relative_path : $absolute_path; } else { $second_half = $relative_path; } } else { $second_half = $absolute_path; } } else if ($output_type === 0) { $second_half = $url['path']; } if ($has_resource || $has_query || $has_fragment) { if ($second_half==='./' || ($second_half==='/' && $this->site_url['path']==='/')) { $second_half = ''; } } } if ($has_resource) { $second_half .= $url['resource']; } if ($has_query) { $second_half .= '?'. $url['query']; } if ($has_fragment) { $second_half .= '#'. $url['fragment']; } return $first_half . $second_half; } protected function get_default_port($scheme) { switch ($scheme) { case 'http' : return 80; case 'https' : return 443; case 'ftp' : return 21; } foreach ($this->custom_ports as $port_name => $port) { $port_name = strtolower($port_name); if ($port_name === $scheme) { return $port; } } // No listed match found return -1; } protected function get_site_url($custom_site_url) { if ($custom_site_url === '') { $this->custom_site_url = true; $url = ( !isset($_SERVER['HTTPS']) ) ? 'http://' : 'https://'; if ( isset($_SERVER['PHP_AUTH_USER']) ) { $url .= $_SERVER['PHP_AUTH_USER'] .':'. $_SERVER['PHP_AUTH_PW'] .'@'; } $url .= $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']; } else { $url = $custom_site_url; } $url = $this->parse_url($url, true); if ($url !== false) { if ( isset($url['port']) ) { $this->site_port_is_default = ($url['port'] === $this->get_default_port($url['scheme'])); } else { $url['port'] = $this->get_default_port($url['scheme']); $this->site_port_is_default = true; } $url['host_stripped'] = $this->remove_www($url['host']); } $this->site_url = $url; } /* Return an path string. */ protected function implode_path($path, $absolute_output) { if (!empty($path)) { $path = implode('/', $path) .'/'; if ($absolute_output) { $path = '/'.$path; } } else { $path = (!$absolute_output) ? './' : '/'; } return $path; } /* Return an absolute path. */ protected function parse_path($path) { if ($path !== '/') { $path = explode('/', $path); $absolute_path = array(); $first_dir = $path[0]; // Check if not absolute: '/dir/' becomes array('','dir','') if ($first_dir !== '') { if ($first_dir==='.' || $first_dir==='..') { $path = array_merge($this->site_url['path_array'], $path); } } foreach ($path as $dir) { if ($dir !== '') { if ($dir !== '..') { if ($dir !== '.') { array_push($absolute_path, $dir); } } else { $parent_index = count($absolute_path) - 1; if ($parent_index >= 0) { unset( $absolute_path[$parent_index] ); $absolute_path = array_values($absolute_path); } } } } return $absolute_path; } else { // Faster to skip the above block and just create an array return array(); } } /* Return the components of a URL. */ protected function parse_url($url, $init=false) { if ( stripos($url,'data:')===0 || stripos($url,'javascript:')===0 ) { // Nothing can be done with data/javascript URIs return false; } else if (strpos($url, '//') === 0) { // Cannot parse scheme-relative URLs with parse_url $url = $this->site_url['scheme'] . ':' . $url; } // With PHP versions earlier than 5.3.3, an E_WARNING is emitted when URL parsing fails // REMOVE when WordPress enforces a higher version as it will increase performance $url = @parse_url($url); if ($url !== false) { if ($init) { // Checks for host to catch "host:80" if ( !isset($url['scheme']) || !isset($url['host']) ) { // Invalid site url return false; } } if ( isset($url['path']) ) { $path = str_replace(' ', '%20', $url['path']); $last_slash = strrpos($path, '/'); if ($last_slash !== false) { $last_slash++; if ($last_slash < strlen($path)) { // Isolate resource from path $url['resource'] = substr($path, $last_slash); $path = substr($path, 0, $last_slash); } $url['path_array'] = $this->parse_path($path); $url['path'] = $this->implode_path($url['path_array'], true); } else { // No slashes found $url['resource'] = $path; $url['path'] = $this->site_url['path']; $url['path_array'] = $this->site_url['path_array']; } } else if ( isset($url['host']) ) { $url['path'] = '/'; $url['path_array'] = array(); } else { $url['path'] = $this->site_url['path']; $url['path_array'] = $this->site_url['path_array']; } } return $url; } /* Return a path relative to the site path. */ protected function relate_path($absolute_path) { $relative_path = array(); $site_path = $this->site_url['path_array']; // At this point, it's related to the host $related = true; $parent_index = -1; // Find parents foreach ($site_path as $i => $dir) { if ($related) { $absolute_dir = (isset($absolute_path[$i])) ? $absolute_path[$i] : null; if ($dir !== $absolute_dir) { $related = false; } else { $parent_index = $i; } } if (!$related) { // Up one level array_push($relative_path, '..'); } } // Form path foreach ($absolute_path as $i => $dir) { if ($i > $parent_index) { array_push($relative_path, $dir); } } return $relative_path; } /* Return a URL relative to the site URL. $ignore_www :: optionally, ignore "www" subdomain $output_type :: optionally, return either a: 0: root-relative URL (/child-of-root/etc/) 1: path-relative URL (../child-of-parent/etc/) 2: shortest possible URL (root- or path-relative) */ public function relate_url($url, $ignore_www=false, $output_type=2) { if ($this->site_url !== false) { if ($url==='' || $url==='.' || $url==='./') { if ($this->site_url['path'] !== '/') { if ($output_type===1 || $output_type===2) { return './'; } else if ($output_type === 0) { return $this->site_url['path']; } } else { return '/'; } } else if ($url === '/') { return '/'; } else if ($url === '#') { return '#'; } $original_url = $url; $url = $this->parse_url($url); if ($url === false) { // Unusable format return $original_url; } } else { // Invalid site url return $url; } $related = false; if ( isset($url['scheme']) ) { $scheme = $url['scheme']; if ($scheme === $this->site_url['scheme']) { unset($url['scheme']); if ($ignore_www) { $url['host'] = $this->remove_www($url['host']); $site_host = $this->site_url['host_stripped']; } else { $site_host = $this->site_url['host']; } if ($url['host'] === $site_host) { $related = true; if ( isset($url['port']) ) { if ($url['port'] === $this->site_url['port']) { unset($url['port']); } else { $related = false; } } else if (!$this->site_port_is_default) { $related = false; } if ( isset($url['user']) ) { if (!isset($this->site_url['user']) || $url['user'] !== $this->site_url['user']) { $related = false; } } /*else if ( isset($this->site_url['user']) ) { $related = false; }*/ if ( isset($url['pass']) ) { if (!isset($this->site_url['pass']) || $url['pass'] !== $this->site_url['pass']) { $related = false; } } /*else if ( isset($this->site_url['pass']) ) { $related = false; }*/ if ($related) { unset($url['host'], $url['user'], $url['pass']); } } else if ( isset($url['port']) ) { if ($url['port'] === $this->get_default_port($scheme)) { unset($url['port']); } } } else if ( isset($url['port']) ) { if ($url['port'] === $this->get_default_port($scheme)) { unset($url['port']); } } } if ( !isset($url['host']) ) { $url['path_relative_array'] = $this->relate_path($url['path_array']); $url['path_relative'] = $this->implode_path($url['path_relative_array'], false); } return $this->build_url($url, $output_type); } protected function remove_www($host) { if (strpos($host, 'www.') === 0) { $host = substr($host, 4); } return $host; } } /*function absolute_to_relative_url($url, $ignore_www=true, $choose_shortest=true) { return Absolute_to_Relative_URLs::instance()->relate_url($url, $ignore_www, $choose_shortest); }*/ /* Return a URL relative to the current site URL. $ignore_www :: optionally, ignore "www" subdomain $output_type :: optionally, return either a: 0: root-relative URL (/child-of-root/etc/) 1: path-relative URL (../child-of-parent/etc/) 2: shortest possible URL (root- or path-relative) */ function absolute_to_relative_url($url, $ignore_www=false, $output_type=2) { global $absolute_to_relative_url_instance; if (!isset($absolute_to_relative_url_instance)) { $absolute_to_relative_url_instance = new Absolute_to_Relative_URLs(); } return $absolute_to_relative_url_instance->relate_url($url, $ignore_www, $output_type); } ?>
/home/sudancam/public_html/0d544/../ph/../wp-content/plugins/jannah-optimization/inc/libs/absolute-to-relative-urls.php