note 104958 added to function.parse-url

From rfc3986: As the "first-match-wins" algorithm is identical to the "greedy" disambiguation method used by POSIX regular expressions, it is natural and commonplace to use a regular expression for parsing the potential five components of a URI reference. The following line is the regular expression for breaking-down a well-formed URI reference into its components. ^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))? 12 3 4 5 6 7 8 9 The numbers in the second line above are only to assist readability; they indicate the reference points for each subexpression (i.e., each paired parenthesis). We refer to the value matched for subexpression <n> as $<n>. For example, matching the above expression to http://www.ics.uci.edu/pub/ietf/uri/#Related results in the following subexpression matches: $1 = http: $2 = http $3 = //www.ics.uci.edu $4 = www.ics.uci.edu $5 = /pub/ietf/uri/ $6 = <undefined> $7 = <undefined> $8 = #Related $9 = Related where <undefined> indicates that the component is not present, as is the case for the query component in the above example. Therefore, we can determine the value of the five components as scheme = $2 authority = $4 path = $5 query = $7 fragment = $9 Going in the opposite direction, we can recreate a URI reference from its components by using the algorithm of Section 5.3. ---- Server IP: 69.147.83.197 Probable Submitter: 69.124.113.72 ---- Manual Page -- http://www.php.net/manual/en/function.parse-url.php Edit -- https://master.php.net/note/edit/104958 Del: integrated -- https://master.php.net/note/delete/104958/integrated Del: useless -- https://master.php.net/note/delete/104958/useless Del: bad code -- https://master.php.net/note/delete/104958/bad+code Del: spam -- https://master.php.net/note/delete/104958/spam Del: non-english -- https://master.php.net/note/delete/104958/non-english Del: in docs -- https://master.php.net/note/delete/104958/in+docs Del: other reasons-- https://master.php.net/note/delete/104958 Reject -- https://master.php.net/note/reject/104958 Search -- https://master.php.net/manage/user-notes.php