CI framework source code-URI. php

Source: Internet
Author: User
CI framework source code reading --------- URI. php & lt ;? Phpif (! Defined ('basepath') exit ('nodirectscriptaccessallowed');/*** CodeIgniter ** Anopen CI framework source code reading --------- URI. php
 Config = & load_class ('config', 'core'); log_message ('debug', "URI Class Initialized ");} // ------------------------------/*** Get the URI String ** @ accessprivate * @ returnstring */function _ fetch_uri_string () {// the uri_protocol below is in config. A configuration item in php, // In fact, is to ask you which method to detect the uri information, // The default is AUTO, automatic detection, that is, through various methods of detection, it is detected until it is detected, or all methods are detected .. If (strtoupper ($ this-> config-> item ('uri _ Protocol') = 'auto') {// Is the request coming from the command line? // Start to try the following methods: command line, REQUEST_URI, PATH_INFO, QUERY_STRING. // The $ this-> _ set_uri_string ($ str) method appears multiple times below. this method has nothing to do with it, the value of $ str is filtered and trimmed by // to the $ this-> uri_string attribute. it can be understood as a value for the moment. // If the script is run in command line mode, the parameter is passed through $ _ SERVER ['argv. The following // $ this-> _ parse_cli_args (); obtains some routing parameters that meet our needs. // If you do not use the command line to execute the script, you can skip the following if statement. // At this time, we found that the URI class uses the php_sapi_name () function to test different environments. // The output result in the apache environment is "apache2handler "; // the output result in cgi mode is "cgi-fcgi" // if it is run in command line mode, the output result is: "cli" if (php_sapi_name () = 'cli 'or defined ('stdin') {$ this-> _ set_uri_string ($ this-> _ parse_cli_args (); return ;} // Let's try the REQUEST_URI first, this will work in most situations // find uriif ($ uri = $ this-> _ detect_uri ()) {// If you find uri settings $ this-> uri_string $ this-> _ set_uri _ String ($ uri); return;} // Is there a PATH_INFO variable? // Note: some servers seem seems to be troublesome to have trouble with getenv () so we'll test it two ways // get path $ _ SERVER ['path _ info'] is not available for every request. so when there is no, use getenv ('path _ INFO ') $ path = (isset ($ _ SERVER ['path _ info'])? $ _ SERVER ['path _ info']: @ getenv ('path _ info'); if (trim ($ PATH ,'/')! = ''& $ Path! = "/". SELF) {$ this-> _ set_uri_string ($ path); return;} // No PATH_INFO ?... What about QUERY_STRING? // If $ _ SERVER ['path _ info'] is not found, use QUERY_STRING $ PATH = (isset ($ _ SERVER ['query _ string'])? $ _ SERVER ['query _ string']: @ getenv ('query _ string'); if (trim ($ path ,'/')! = '') {$ This-> _ set_uri_string ($ path); return ;} // As a last ditch effort lets try using the $ _ GET array // if neither PATH_INFO nor QUERY_STRING are found, we can only use $ _ GETif (is_array ($ _ GET) & count ($ _ GET) = 1 & trim (key ($ _ GET ),'/')! = '') {$ This-> _ set_uri_string (key ($ _ GET); return;} // We 've exhausted all our options... // after the above efforts, we have not found the uri, so we really cannot find $ this-> uri_string = ''; return ;} // here, I wrote it again to get uri_protocol. actually, I think it can be obtained only once... $ Uri = strtoupper ($ this-> config-> item ('uri _ Protocol ')); // The following describes how to obtain a uri using different methods. if ($ uri = 'Request _ URI ') {$ this-> _ set_uri_string ($ this-> _ detect_uri (); return;} elseif ($ uri = 'cli ') {$ this-> _ set_uri_string ($ this-> _ parse_cli_args (); return ;} // if the uri_protocol you define is beyond the three methods of AUTO REQUEST_URI CLI, execute the following section. $ Path = (isset ($ _ SERVER [$ uri])? $ _ SERVER [$ uri]: @ getenv ($ uri); $ this-> _ set_uri_string ($ path );} // ------------------------------/*** Set the URI String ** @ accesspublic * @ param string * @ returnstring */function _ set_uri_string ($ str) {// Filter out control characters // Filter string remove_invisible_characters function in common. $ str = remove_invisible_characters ($ str, FALSE) in php; // If the URI contains only a slash we'll kill it // If the string contains only one/ Clear $ this-> uri_string = ($ str = '/')? '': $ Str;} // --------------------------------/*** Detects the URI * find uri * This function will detect the URI automatically and fix the query string * if necessary. necessity * if necessary, this function will automatically search for the uri and fix the query string. ** @ Accessprivate * @ returnstring */private function _ detect_uri () {// returns if either of the two values does not exist (the two variables come from the web server, some special server programs may be empty .) if (! Isset ($ _ SERVER ['request _ URI ']) OR! Isset ($ _ SERVER ['script _ name']) {return '';} // get uri $ uri = $ _ SERVER ['request _ URI ']; // if the first occurrence of SCRIPT_NAME in $ uri is 0 if (strpos ($ uri, $ _ SERVER ['script _ name']) === 0) {// remove the section with the same uri and SCRIPT_NAME $ uri = substr ($ uri, strlen ($ _ SERVER ['script _ name']);} // the above function is only used to replace $ _ SERVER ['script _ name'] with // dirname ($ _ SERVER ['script _ name']). elseif (strpos ($ uri, dirname ($ _ SERVER ['script _ name']) ===0) {$ uri = substr ($ u Ri, strlen (dirname ($ _ SERVER ['script _ name']);} // This section ensures ensure that even on servers that require the URI // to be in the query string (Nginx) a correct is correct // URI is found, and also fixes repairs the QUERY_STRING server var and $ _ GET array. // This part ensures that the uri can be correctly found, even on the Nginx server, and the QUERY_STRING server and $ _ GET array are also fixed. // Determine the first two characters of $ uri, right? /If (strncmp ($ uri ,'? /', 2) = 0) {// remove the first two characters $ uri = substr ($ uri, 2 );} // use the main book to split the string $ parts = preg_split ('#\? # I ', $ uri, 2); $ uri = $ parts [0]; // if the preceding regular expression can be used to split two segments, then the query string is used? If (isset ($ parts [1]) {$ _ SERVER ['query _ string'] = $ parts [1]; // The function parses the query string to the $ _ GET variable. Parse_str ($ _ SERVER ['query _ string'], $ _ GET);} else {$ _ SERVER ['query _ string'] = ''; $ _ GET = array ();} // if it is/or null, either the query_string or? In this case, $ parts [0] is equal to the following two possibilities. at the same time, we have obtained the desired information through $ parts [1, you can return. // Either it is in the form of a segment, but the segment information is blank, that is, directly access the entry file without // any route information transmission, you can also directly return. If ($ uri = '/' | empty ($ uri) {return '/';} // return the path part of the url. $ Uri = parse_url ($ uri, PHP_URL_PATH); // Do some final cleaning of the URI and return it // Convert //.. /replace with/And return str_replace (array ('//','.. /'),'/', trim ($ uri ,'/'));} // --------------------------------/*** Parse cli arguments * parses the cli parameter * Take each command line argument and assume it is a URI segment. * If you perform this operation in the command line * php d:/wamp/www/CodeIgniter/index. php welcome index * _ parse_cli_args () returns /Welcome/index strings ** @ accessprivate * @ returnstring */private function _ parse_cli_args () {// return the parameters passed during running in command line mode. // Because the first parameter is the current file name, we need to obtain it from the second one. $ Args = array_slice ($ _ SERVER ['argv'], 1); // returns a string concatenated by a '/' string because $ this-> uri_string is a string. Return $ args? '/'. Implode ('/', $ args ):'';} // --------------------------------/*** Filter segments segment for malicious characters * Filter invalid characters * @ accessprivate * @ paramstring * @ returnstring */function _ filter_uri ($ str) {if ($ str! = ''& $ This-> config-> item ('permitted _ uri_chars ')! = ''& $ This-> config-> item ('enable _ query_strings ') = FALSE) {// preg_quote () in PHP 5.3 escapes -, so the str_replace () and addition of-to preg_quote () is to maintain backwards backward // compatibility as unknown are unknown unaware unknown of how characters in the permitted_uri_chars will be parsed as a regex pattern // probably means that the php5.3.0 character-is added to escape. So here we use str_replace () to add preg_quote () to escape-if (! Preg_match ("| ^ [". str_replace (array ('\-', '\-'), '-', preg_quote ($ this-> config-> item ('permitted _ uri_chars '), '-')). "] + $ | I", $ str) {show_error ('The URI you submitted has disallowed characters. ', 400) ;}// Convert programatic characters to entities // Convert character entities $ bad = array (' $ ','(',')', '% 28',' % 29'); $ good = array ('$ ','(',')','(',')'); return str_replace ($ bad, $ good, $ str );}//-------------------------------- /*** Remove the suffix from the URL if needed * // Remove the custom suffix of the url. * @ Accessprivate * @ returnvoid */function _ remove_url_suffix () {if ($ this-> config-> item ('URL _ suffix ')! = "") {$ This-> uri_string = preg_replace ("| ". preg_quote ($ this-> config-> item ('URL _ suffix ')). "$ |", "", $ this-> uri_string) ;}// ------------------------------/*** Explode the URI Segments. the individual segments will * be stored in the $ this-> segments array. * split the uri into a forward segment and filter each segment at the same time, and store it in $ this-> segments [] * @ accessprivate * @ returnvoid */function _ explode_segments () {foreach (explode ("/", preg_replace ("|/ * (. + ?) /* $ | "," \ 1 ", $ this-> uri_string) as $ val) {// Filter segments for security $ val = trim ($ this-> _ filter_uri ($ val); if ($ val! = '') {$ This-> segments [] = $ val ;}}} // --------------------------------/*** Re-index Segments Re-index the SEGMENT * to save the following marked 1. This method is easier to use because the segment array has a relationship with the actual segment. * this function re-indexes the $ This-> segment array so that it * starts at 1 rather than 0. doing so makes it simpler to * use functions like $ this-> uri-> segment (n) since there is * a 1:1 relationship between the segment array and the actual real segments. ** @ accessprivate * @ returnvoid */function _ reindex_segments () {array_unshift ($ this-> segments, NULL); array_uns Hift ($ this-> rsegments, NULL); unset ($ this-> segments [0]); unset ($ this-> rsegments [0]);} // ------------------------------/*** Fetch a URI Segment * get a uri segment * This function returns the URI Segment based on the number provided. provide * This function returns a provided-based numeric uri segment * @ accesspublic * @ paraminteger * @ parambool * @ returnstring */function segment ($ n, $ no_result = FALSE) {return (! Isset ($ this-> segments [$ n])? $ No_result: $ this-> segments [$ n];} // --------------------------------/*** Fetch a URI "routed" Segment * returns a segment after the route is determined. * This function returns the re-routed URI Segment (assuming assumes that the routing rules are used) * based on the number provided. if there is no routing this function returns the * same result as $ this-> segment () * this function returns a provided number-based uri segment (assuming that the routing rule is already in use). * If this function is not used with routing, it will be associated with $ this-> segment () is the same ** @ Accesspublic * @ paraminteger * @ parambool * @ returnstring */function rsegment ($ n, $ no_result = FALSE) {return (! Isset ($ this-> rsegments [$ n])? $ No_result: $ this-> rsegments [$ n];} // --------------------------------/*** Generate a key value pair from the URI string * Generate an array of key-value pairs based on the uri string ** This function generates and associative associated array URI data starting * at the supplied... Provide segment. for example, if this is your URI: ** example.com/user/search/name/joe/location/UK/gender/male ** You can use this function to generate an array with this prototype: ** array (* name => joe * location => UK * gender => male *) * this function generates an associated array from the uri segment * example: if your uri is like this * example.com/user/search/name/joe/location/UK/gender/male *, a prototype such as * array (* name => joe * location => UK * gender => m Ale *) * @ accesspublic * @ paramintegerthe starting segment number * @ paramarrayan array of default values * @ returnarray */function uri_to_assoc ($ n = 3, $ default = array ()) {return $ this-> _ uri_to_assoc ($ n, $ default, 'segment ');} /*** the Identical thing to the above only it uses the re-routed segment array * is exactly the same as the last function, except that it flushes the route segment array (note that the third parameters) * @ access public * @ param integerthe starting segment number * @ Param arrayan array of default values * @ return array **/function ruri_to_assoc ($ n = 3, $ default = array ()) {return $ this-> _ uri_to_assoc ($ n, $ default, 'rsegment ');} // --------------------------------/*** Generate a key value pair from the URI string or Re-routed URI string * Generate an array of key-value pairs based on the uri string or the Re-routed uri string *@ accessprivate * @ paramintegerthe starting segment number start segment number * @ paramarrayan array Default values * @ paramstringwhich array we shocould use * @ returnarray */function _ uri_to_assoc ($ n = 3, $ default = array (), $ which = 'segment ') {// whether the segmented array is rerouted. If ($ which = 'segment') {$ total_segments = 'total _ segments '; $ segment_array = 'segment _ array ';} else {$ total_segments = 'total _ rsegments '; $ segment_array = 'rsegment _ array';} // $ n is not a number if (! Is_numeric ($ n) {return $ default;} // The cache uri segment list contains the $ n keyif (isset ($ this-> keyval [$ n]) {return $ this-> keyval [$ n];} // The total number of segments is less than $ n if ($ this-> $ total_segments () <$ n) {if (count ($ default) = 0) {return array () ;}$ retval = array (); foreach ($ default as $ val) {$ retval [$ val] = FALSE;} return $ retval;} $ segments = array_slice ($ this-> $ segment_array (), ($ n-1 )); $ I = 0; $ lastval = ''; $ retval = array (); foreach ($ segments As $ seg) {if ($ I % 2) {$ retval [$ lastval] = $ seg;} else {$ retval [$ seg] = FALSE; $ lastval = $ seg;} $ I ++;} if (count ($ default)> 0) {foreach ($ default as $ val) {if (! Array_key_exists ($ val, $ retval) {$ retval [$ val] = FALSE ;}}} // Cache the array for reuse // Cache array reuse once $ this-> keyval [$ n] = $ retval; return $ retval ;} // --------------------------------/*** Generate a URI string from an associative associated array * Generate a uri string based on an associated array ** @ accesspublic * @ paramarrayan associative array of key/values * @ returnarray */function assoc_to_uri ($ array) {$ temp = array (); foreach (array) $ array as $ key => $ val) {$ temp [] = $ key; $ temp [] = $ val;} return implode ('/', $ temp);} // after --------------------------------/*** Fetch a URI Segment and add a trailing, trailing slash * gets a uri segment and adds a/** @ accesspublic * @ paraminteger * @ paramstring * @ returnstring */function slash_segment ($ n, $ where = 'trailing ') {return $ this-> _ slash_segment ($ n, $ where, 'segment ');} // --------------------------------/*** Fetch a URI Segment and add a trailing slash * get the uri Segment of the route and add/* @ accesspublic * @ paraminteger * @ paramstring * @ returnstring * /function slash_rsegment ($ n, $ where = 'trailing') {return $ this-> _ slash_segment ($ n, $ where, 'rsegment ');} // Configure/*** Fetch a URI Segment and add a trailing slash-helper function ** @ accessprivate * @ paraminteger * @ paramstring * @ returnstring */function _ slash_segment ($ n, $ where = 'trailing', $ which = 'segment') {$ leading = '/'; $ trailing = '/'; if ($ where = 'trailing ') {$ leading = '';} elseif ($ where = 'leading') {$ trailing ='';} return $ leading. $ this-> $ which ($ n ). $ trailing;} // ------------------------------/*** Segment Array * obtain the Segment Array * @ accesspublic * @ returnarray */function segment_array () {return $ this-> segments ;} // --------------------------------/*** Routed Segment Array * obtain the Segment Array that has been Routed * @ accesspublic * @ returnarray */function rsegment_array () {return $ this-> rsegments ;} // ------------------------------/*** Total number of segments * obtain the Total number of segments * @ accesspublic * @ returninteger */function total_segments () {return count ($ this-> segments );} // --------------------------------/*** Total number of routed segments * obtain the Total number of segments already routed * @ accesspublic * @ returninteger */function total_rsegments () {return count ($ this-> rsegments);} // ------------------------------/*** Fetch the entire URI string ** @ accesspublic * @ returnstring */function uri_string () {return $ this-> uri_string;} // --------------------------------/*** Fetch the entire Re-routed URI string ** @ accesspublic * @ returnstring */function ruri_string () {return '/'. implode ('/', $ this-> rsegment_array () ;}// end uri Class/* End of file URI. php * // * Location :. /system/core/URI. php */


Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.