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...

^[_a-zA-Z0-9]+$ how to make regex username with underscore. i'm using c# but this regex isn't working.

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

Matches the Content-Range response header format -[end]/[total|*]

Matches any telephone number with region parentesis, or separated by points or dash or spaces

Detect various possible HTML linebreak tags (eg. )