Core File (route) Router. php

The URI routing mode of CI is clear to everyone. It also supports powerful route redirection:/*** Router ** @ linkhttp: // www.phpddt.com */classCI_Ro

The URI routing mode of CI is clear to everyone. It also supports powerful route redirection:

/*** Router ** @ link http://www.phpddt.com */Class CI_Router {// configuration class var $ config; // route information, routes. var $ routes = array ();/*** List of error routes *** @ var array * @ access public */var $ error_routes = array (); // Current controller name or class name var $ class = ''; // Current controller method var $ method = 'index'; // directory name var $ directory = ''; // Default controller var $ default_controller;/*** Constructor ** Runs the route mapping function. */function _ construct () {$ this-> config = & load_class ('config', 'core '); $ This-> uri = & load_class ('uri', 'core'); log_message ('debug', "Router Class Initialized ");} // ----------------------------------------------------------------------/*** set route ing */function _ set_routing () {$ segments = array (); // if the URL is enable_query_stringsif ($ this-> config-> item ('enable _ query_strings ') === true and isset ($ _ GET [$ this-> config-> item ('Controller _ trigger')]) {// Obtain the directory name if (isset ($ _ GET [$ this-> Config-> item ('directory _ trigger')]) {$ this-> set_directory (trim ($ this-> uri-> _ filter_uri ($ _ GET [$ this-> config-> item ('directory _ trigger')]) )); $ segments [] = $ this-> fetch_directory ();} // Obtain the controller name if (isset ($ _ GET [$ this-> config-> item ('Controller _ trigger')]) {$ this-> set_class (trim ($ this-> uri-> _ filter_uri ($ _ GET [$ this-> config-> item ('Controller _ trigger')]) )); $ segments [] = $ this-> fetch_class ();} // Obtain the method name if (isset ($ _ GET [$ this-> config-> item ('function _ trigger')]) {$ this-> set_method (trim ($ this-> uri-> _ filter_uri ($ _ GET [$ this-> config-> item ('function _ trigger ')]) )); $ segments [] = $ this-> fetch_method () ;}// load routes. php, introduce the route configuration information if (defined ('environment ') AND is_file (APPPATH. 'config /'. ENVIRONMENT. '/routes. php ') {include (APPPATH. 'config /'. ENVIRONMENT. '/routes. php ');} elseif (is_file (APPPATH. 'config/routes. php ') {includ E (APPPATH. 'config/routes. php');} // Obtain route configuration information $ this-> routes = (! Isset ($ route) OR! Is_array ($ route ))? Array (): $ route; unset ($ route); // Get the configuration information to get the default controller $ this-> default_controller = (! Isset ($ this-> routes ['default _ controller']) OR $ this-> routes ['default _ controller'] = '')? FALSE: strtolower ($ this-> routes ['default _ controller']); // if $ segments is obtained, the route is determined directly, after the execution of the function if (count ($ segments)> 0) {// _ validate_request (), return $ this-> _ validate_request ($ segments );} // Obtain and confirm uri_string =. php $ this-> uri-> _ fetch_uri_string (); // if uri_string is empty, only if ($ this-> uri-> uri_string = '') is routed by default '') {return $ this-> _ set_default_controller ();} // CI allows the suffix url_suffix to be added to the uri, but it is useless for routing analysis. remove $ this-> uri-> _ Remove_url_suffix (); // use/to separate uri_string and save the result to segments $ this-> uri-> _ explode_segments (); // Parse the route (check the redirection and set the route) $ this-> _ parse_routes (); // this is to re-index the array from subscript 1, this is for your usage habits. for example, $ this-> uri-> segment (1) is to get the first section $ this-> uri-> _ reindex_segments ();} // Configure/*** set the default route */function _ set_default_controller () {// if no default controller exists, show errorif ($ this-> default_controller = FALSE) {show_error ("Unable to determine what shoshould be displayed. A default route has not been specified in the routing file. ");} // Oh, originally, routes. in php, $ route ['default _ controller'] = "welcome"; you can also set the default method $ route ['default _ controller'] = "welcome/index "; if (strpos ($ this-> default_controller ,'/')! = FALSE) {$ x = explode ('/', $ this-> default_controller); $ this-> set_class ($ x [0]); $ this-> set_method ($ x [1]); $ this-> _ set_request ($ x);} else {$ this-> set_class ($ this-> default_controller ); $ this-> set_method ('index'); $ this-> _ set_request (array ($ this-> default_controller, 'index');} // re-create the segments index, start with $ this-> uri-> _ reindex_segments (); log_message ('debug', "No URI present. default controller set. ");}//------------ ----------------------------------------------------/*** Set routing */function _ set_request ($ segments = array () {// _ validate_request () returns array (controller, method, xxx, xxx ...) $ segments = $ this-> _ validate_request ($ segments); if (count ($ segments) = 0) {// _ set_default_controller () also calls _ set_request () return $ this-> _ set_default_controller () ;}$ this-> set_class ($ segments [0]); if (isset ($ segments [1]) {// A sta Ndard method request $ this-> set_method ($ segments [1]);} else {// If method is not set, then index is the URI in the default method $ segments [1] = 'index';} // URI: $ rsegments is the route after processing and confirmation, segment Information of the actually called Route $ this-> uri-> rsegments = $ segments;} // parts/*** verify the segments array */function _ validate_request ($ segments) {if (count ($ segments) = 0) {return $ segments;} // whether the requested controller exists if (f Ile_exists (APPPATH. 'controllers /'. $ segments [0]. '. php ') {return $ segments;} // if the controller file does not exist, whether it is in the if (is_dir (APPPATH. 'controllers /'. $ segments [0]) {// sets the directory and removes it from the segment array $ this-> set_directory ($ segments [0]); $ segments = array_slice ($ segments, 1); if (count ($ segments)> 0) {// if the current controller file does not exist, show 404if (! File_exists (APPPATH. 'controllers/'. $ this-> fetch_directory (). $ segments [0].'. php') {if (! Empty ($ this-> routes ['1970 _ override']) {$ x = explode ('/', $ this-> routes ['1970 _ override']); $ this-> set_directory (''); $ this-> set_class ($ x [0]); $ this-> set_method (isset ($ x [1])? $ X [1]: 'index'); return $ x;} else {show_404 ($ this-> fetch_directory (). $ segments [0]) ;}} else {// if the $ segments array is empty, use the default route if (strpos ($ this-> default_controller ,'/')! = FALSE) {$ x = explode ('/', $ this-> default_controller); $ this-> set_class ($ x [0]); $ this-> set_method ($ x [1]);} else {$ this-> set_class ($ this-> default_controller ); $ this-> set_method ('index');} // if the default controller file does not exist, an empty array if (! File_exists (APPPATH. 'controllers /'. $ this-> fetch_directory (). $ this-> default_controller. '. php ') {$ this-> directory = ''; return array () ;}// if the controller file is in a subdirectory, return the segments array that does not contain the directory return $ segments;} // This step shows that the controller file does not exist and the 404 page is reported. if (! Empty ($ this-> routes ['1970 _ override']) {$ x = explode ('/', $ this-> routes ['1970 _ override']); $ this-> set_class ($ x [0]); $ this-> set_method (isset ($ x [1])? $ X [1]: 'index'); return $ x;} // Nothing else to do at this point but show a 404show_404 ($ segments [0]);} // ----------------------------------------------------------------------/*** config/routes. php route redirection */function _ parse_routes () {// Convert the uri setment array to uri_string $ uri = implode ('/', $ this-> uri-> segments); // routes. php whether to reset the route if (isset ($ this-> routes [$ uri]) {return $ this-> _ set_request (explode ('/', $ this -> Routes [$ uri]);} // Loop through the route array looking for wild-cardsforeach ($ this-> routes as $ key => $ val) {// CI custom: num and: any wildcard $ key = str_replace (': any ','. + ', str_replace (': num', '[0-9] +', $ key); // Does the RegEx match? If (preg_match ('# ^ '. $ key. '$ #', $ uri) {// regular expressions support reverse applications such as: $ route ['products/([a-z] +)/(\ d +) '] = "$1/id _ $2"; if (strpos ($ val,' $ ')! = False and strpos ($ key ,'(')! = FALSE) {$ val = preg_replace ('# ^ '. $ key. '$ #', $ val, $ uri);} // return $ this-> _ set_request (explode ('/', $ val) ;}}// this step indicates that the redirection route $ this-> _ set_request ($ this-> uri-> segments) is not matched );} function set_class ($ class) {$ this-> class = str_replace (array ('/','. '), '', $ class);} function fetch_class () {return $ this-> class;} function set_method ($ method) {$ this-> method = $ method;} function fetch_method () {if ($ this-> me Thod = $ this-> fetch_class () {return 'index';} return $ this-> method;} function set_directory ($ dir) {$ this-> directory = str_replace (array ('/','. '), '', $ dir ). '/';} function fetch_directory () {return $ this-> directory;} function _ set_overrides ($ routing) {if (! Is_array ($ routing) {return;} if (isset ($ routing ['Directory']) {$ this-> set_directory ($ routing ['Directory']);} if (isset ($ routing ['controller']) AND $ routing ['controller']! = '') {$ This-> set_class ($ routing ['controller']);} if (isset ($ routing ['function']) {$ routing ['function'] = ($ routing ['function'] = '')? 'Index': $ routing ['function']; $ this-> set_method ($ routing ['function']); }}}