Regular Expressions 101

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Regular Expression
Created·2020-03-17 13:28
Flavor·PCRE (Legacy)

/
^(2[0-4]\d|25[0-5]|1\d\d|\d\d?)\.(?1)\.(?1)\.(?1)(\/[3][0-2]|\/[0-2][0-9]|\/[0])?$
/
gm
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Submitted by anonymous