Nested groups

regex

^(?:https?|ftp)://([^/\s]+)

Explanation

Captures the host while allowing several schemes.

Learn the surrounding workflow

Compare similar commands or jump into common fixes when this command is part of a bigger troubleshooting path.

Same sheet · prioritizing Groups and Alternation

Capture a submatch for reuse or extraction.

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Group without creating a numbered capture.

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Match one branch or another.

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Make an entire grouped piece optional.

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Reset group numbers per alternation branch.

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Match only at the beginning of the input.