Regular Expressions 101

Community Patterns

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Regular Expression
PCRE (PHP <7.3)

/
(?(DEFINE) (?<unreserved> [-._~[:alnum:]] ) (?<sub_delims> [!$&'()*+,;=] ) (?<pct_encoded> %[[:xdigit:]][[:xdigit:]] ) (?<pchar> @|(?&unreserved)|(?&pct_encoded)|(?&sub_delims) ) (?<seg_nz_nc> (?&pchar)+ ) (?<seg_nz> (?::|(?&pchar))+ ) (?<seg> (?::|(?&pchar))* ) (?<rootless> (?&seg_nz)(?:\/(?&seg))* ) (?<noscheme> (?&seg_nz_nc)(?:\/(?&seg)*) ) (?<absolute> \/(?:(?&seg_nz)(?:\/(?&seg))*)? ) (?<abempty> (?:\/(?&seg))* ) ) ^(?:(?&rootless)|(?&noscheme)|(?&absolute)|(?&abempty))$
/
gix

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Submitted by anonymous - 6 years ago