Regular Expressions 101

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IP v4 format validation

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Regular Expression
pcre

/
^([01][0-9][0-9]\.|2[0-4][0-9]\.|[0-9][0-9]\.|25[0-5]\.|[0-9]\.)([01][0-9][0-9]\.|2[0-4][0-9]\.|[0-9][0-9]\.|25[0-5]\.|[0-9]\.)([01][0-9][0-9]\.|2[0-4][0-9]\.|[0-9][0-9]\.|25[0-5]\.|[0-9]\.)([01][0-9][0-9]|2[0-4][0-9]|25[0-5]|[0-9][0-9]|[0-9])$
/
gm

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Submitted by NexRezzo - 6 years ago