Re: [PHP] please help with regular expression in preg_replace
Many thanx to Jim and andy for their replies, with Jim`s changes its now working like in sed. Excuse me for my stupid question, but im old unix/linux system engineer coding with C , perl and bash, php gave me unpredictable results in this task. ;-) so, in final, may be this help some other roundcube users who need one universal site for many domain access. this is test page: ?php $host = host.1stdom.com ; //$host = host.2nddom.1stdom.com ; $pattern1 = '/[^.]*\./U' ; $pattern2 = '/^[^.]+\./' ; exec( echo $host | sed s/[^.]*\.//, $dom_sed ) ; $p1_1 = preg_replace( '/[^.]*\./U' , '', $host ) ; $p1_2 = preg_replace( $pattern1 , '', $host ) ; $p2_1 = preg_replace( '/^[^.]+\./' , '', $host ) ; $p2_2 = preg_replace( $pattern2 , '', $host ) ; echo $host br ; echo dom_sed = $dom_sed[0]br ; echo p1_1 = $p1_1 br ; echo p1_2 = $p1_2 br ; echo p2_1 = $p2_1 br ; echo p2_2 = $p2_2 br ; ? with result: host.1stdom.com dom_sed = 1stdom.com p1_1 = com p1_2 = com p2_1 = 1stdom.com p2_2 = 1stdom.com and this is line which i need in roundcube setup: $rcmail_config['username_domain'] = preg_replace( '/^[^.]+\./' , '', $_SERVER['HTTP_HOST'] ) ; many thanks again Rene - Original Message - From: Jim Lucas li...@cmsws.com To: Red r...@you.sk Cc: php-general@lists.php.net Sent: Friday, October 30, 2009 12:33 AM Subject: Re: [PHP] please help with regular expression in preg_replace Red wrote: hello, im not a php developer, i just need to rewrite one php file but having problem with understanding syntax of regexp in php. i need to get domain name from fqdn (for example from $_SERVER['HTTP_HOST'] ) in sed its working well with s/[^.]*\.// , but preg_replace behaves weird. http_host is for example hostname.domain.com ?php $host = $_SERVER['HTTP_HOST']; exec( echo $host | sed s/[^.]*\.//, $domain ) ; echo $domain[0] ? return domain.com, but ?php $host = $_SERVER['HTTP_HOST']; $domain = preg_replace( '/[^.]*\./' , '', $host) ; echo $domain; ? return only com i think when this php page get many hits, its not so wise to call sed everytime, i would like to ask someone for help how to write preg_replace pattern. thanx Rene I would add one thing and change another. ?php $host = $_SERVER['HTTP_HOST']; $domain = preg_replace( '/^[^.]+\./' , '', $host) ; echo $domain; ? Adding an additional '^' to the start tells it to start at the beginning. And changing '*' to a '+' Jim -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] please help with regular expression in preg_replace
hello, im not a php developer, i just need to rewrite one php file but having problem with understanding syntax of regexp in php. i need to get domain name from fqdn (for example from $_SERVER['HTTP_HOST'] ) in sed its working well with s/[^.]*\.// , but preg_replace behaves weird. http_host is for example hostname.domain.com ?php $host = $_SERVER['HTTP_HOST']; exec( echo $host | sed s/[^.]*\.//, $domain ) ; echo $domain[0] ? return domain.com, but ?php $host = $_SERVER['HTTP_HOST']; $domain = preg_replace( '/[^.]*\./' , '', $host) ; echo $domain; ? return only com i think when this php page get many hits, its not so wise to call sed everytime, i would like to ask someone for help how to write preg_replace pattern. thanx Rene
Re: [PHP] please help with regular expression in preg_replace
Hi Rene, This looks suspiciously like regex's greedy behaviour - it will gobble up everything that matches until you tell it otherwise. For example, your regex is matching any character that isn't a dot, followed by a dot. In host.domain.com, both host. and domain. match this regex - and because your regex is greedy it's grabbing both, leaving you with com. Try adding the ungreedy modifier to your regex, like so: $domain = preg_replace( '/[^.]*\./U' , '', $host); (note the additional U in your regex.) HTH, Andy On 29 October2009, at 20:33, Red wrote: hello, im not a php developer, i just need to rewrite one php file but having problem with understanding syntax of regexp in php. i need to get domain name from fqdn (for example from $_SERVER ['HTTP_HOST'] ) in sed its working well with s/[^.]*\.// , but preg_replace behaves weird. http_host is for example hostname.domain.com ?php $host = $_SERVER['HTTP_HOST']; exec( echo $host | sed s/[^.]*\.//, $domain ) ; echo $domain[0] ? return domain.com, but ?php $host = $_SERVER['HTTP_HOST']; $domain = preg_replace( '/[^.]*\./' , '', $host) ; echo $domain; ? return only com i think when this php page get many hits, its not so wise to call sed everytime, i would like to ask someone for help how to write preg_replace pattern. thanx Rene -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] please help with regular expression in preg_replace
Red wrote: hello, im not a php developer, i just need to rewrite one php file but having problem with understanding syntax of regexp in php. i need to get domain name from fqdn (for example from $_SERVER['HTTP_HOST'] ) in sed its working well with s/[^.]*\.// , but preg_replace behaves weird. http_host is for example hostname.domain.com ?php $host = $_SERVER['HTTP_HOST']; exec( echo $host | sed s/[^.]*\.//, $domain ) ; echo $domain[0] ? return domain.com, but ?php $host = $_SERVER['HTTP_HOST']; $domain = preg_replace( '/[^.]*\./' , '', $host) ; echo $domain; ? return only com i think when this php page get many hits, its not so wise to call sed everytime, i would like to ask someone for help how to write preg_replace pattern. thanx Rene I would add one thing and change another. ?php $host = $_SERVER['HTTP_HOST']; $domain = preg_replace( '/^[^.]+\./' , '', $host) ; echo $domain; ? Adding an additional '^' to the start tells it to start at the beginning. And changing '*' to a '+' Jim -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
