A pcre that capture a 4-digit numeric that does not allow a leading zero and no repeat digits.

This regular expression splits an address line like for example "1117 Franklin Blvd" into the street name and house number. It also supports addresses where street name and house number are the other way around (e.g. "Mustermannstr. 1"). Furthermore, this regular expression also supports address lin...

This can be used to find all zone files that contain authoritative nameservers - e.g. perl -ne 'print if /^([\w.]+\.)\s+.+\sNS\s.+\1/' /var/named/*.db | awk '{print $1}' | sort | uniq

Get the content of a DIV HTML Tag.

Visa, MasterCard, American Express, Diners Club, Discover, JCB

allows for all legal IPv4 addresses

Pattern that matches all expression that not include a subexpression. The subexpression could be replaced by a string.

should start with letter follow by letters and numbers and (-) - zero or more can't start or finish with (-) can't have two or more consecutive (-) char