Verifies YouTube video links AND pulls the video ID from them in a matching group. Works with all capitalizations. It also matches the WHOLE link but sorts the video ID into a group. Works with JavaScript, PHP and Python. (Not tested with any other Regex engine) ...

For python regex, substiution not working properly. It is not replcing matched content of $1... and so on. Please take a look.

Matches ranges from 0-255 for all four octets. Extra leading or trailing '.' invalidate the match, as do values > 255.

This regex can be used to parse the "general", "video" or "audio" stream metadata returned by the mediainfo.dll inform() call.

find leading zeros in ipv4 adresses

Matches current mobile telephone numbers in Spain.

Matches current mobile phone numbers in Portugal

Find li tag with "word"

Matches PHP define("CONSTANT", "VALUE)

Get an specific html tag and return his content

Match french telephones numbers. Allows space, dot and dash between pairs of numbers.