Regular Expressions 101

^start of line

Group 1(([A-Z]{2}-\d{2}-(\d{2}|[A-Z]{2}))|(\d{2}-(\d{2}-[A-Z]{2}|[A-Z]{2}-\d{2})))

1st Alternative([A-Z]{2}-\d{2}-(\d{2}|[A-Z]{2}))

Group 2([A-Z]{2}-\d{2}-(\d{2}|[A-Z]{2}))

Character Class[A-Z]{2}

{2}matches exactly 2 characters from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{2}a digit, repeated exactly 2 times

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 3(\d{2}|[A-Z]{2})

1st Alternative\d{2}

\d{2}a digit, repeated exactly 2 times

2nd Alternative[A-Z]{2}

Character Class[A-Z]{2}

{2}matches exactly 2 characters from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

2nd Alternative(\d{2}-(\d{2}-[A-Z]{2}|[A-Z]{2}-\d{2}))

Group 4(\d{2}-(\d{2}-[A-Z]{2}|[A-Z]{2}-\d{2}))

\d{2}a digit, repeated exactly 2 times

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 5(\d{2}-[A-Z]{2}|[A-Z]{2}-\d{2})

1st Alternative\d{2}-[A-Z]{2}

\d{2}a digit, repeated exactly 2 times

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[A-Z]{2}

{2}matches exactly 2 characters from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

2nd Alternative[A-Z]{2}-\d{2}

Character Class[A-Z]{2}

{2}matches exactly 2 characters from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{2}a digit, repeated exactly 2 times

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

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Search reference

Regular Expression

^(([A-Z]{2}-\d{2}-(\d{2}|[A-Z]{2}))|(\d{2}-(\d{2}-[A-Z]{2}|[A-Z]{2}-\d{2})))$

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