rettifico... ho errori


[Wed Aug 09 10:32:02.004700 2017] [:error] [pid 9065] [client 192.168.1.20:43108] PHP Warning: preg_match(): No ending delimiter '^' found in /srv/http/upgrade3.php on line 48
[Wed Aug 09 10:32:02.004711 2017] [:error] [pid 9065] [client 192.168.1.20:43108] PHP Warning: preg_match(): Delimiter must not be alphanumeric or backslash in /srv/http/upgrade3.php on line 48



p.s.
c'e' la possibilita' di eseguire php in versione 5 ?