Oops, it's better to use \Z than that final (\s|$) I had suggested (see post above).

The MkII Match valid IPv4 at start of line (drum-roll please): 

/^((\d{1,2}|1\d{2}|2[0-4]\d|25[0-5])\.){3}\2\Z/

LaurenceHunter => "Life is loud, life is 60p/min."

In reply to Re: Clarify this Regular Expression by Anonymous Monk
in thread Clarify this Regular Expression by dru145

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