Regular Expressions 101

Group 1([0-9]{7}[xX0-9]{1})

Character Class[0-9]{7}

{7}matches exactly 7 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Character Class[xX0-9]{1}

{1}matches one character from the set below:

xthe literal x (120₁₀ / 170₈ / 78₁₆) (case sensitive)

Xthe literal X (88₁₀ / 130₈ / 58₁₆) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

\_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Group 2([0-9]{3}|[0-9]{3}\-[0-9]{3})

1st Alternative[0-9]{3}

Character Class[0-9]{3}

{3}matches exactly 3 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

2nd Alternative[0-9]{3}\-[0-9]{3}

Character Class[0-9]{3}

{3}matches exactly 3 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[0-9]{3}

{3}matches exactly 3 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

\_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Group 3([0-9]{2}|[0-9]{2}\-[0-9]{2})

1st Alternative[0-9]{2}

Character Class[0-9]{2}

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

0-9one character from 0 (48₁₀) to 9 (57₁₀)

2nd Alternative[0-9]{2}\-[0-9]{2}

Character Class[0-9]{2}

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

0-9one character from 0 (48₁₀) to 9 (57₁₀)

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[0-9]{2}

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

0-9one character from 0 (48₁₀) to 9 (57₁₀)

\_the literal _ (95₁₀ / 137₈ / 5F₁₆)

.*any character (except for line terminators), repeated any number of times

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

.*any character (except for line terminators), repeated any number of times

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

([0-9]{7}[xX0-9]{1})\_([0-9]{3}|[0-9]{3}\-[0-9]{3})\_([0-9]{2}|[0-9]{2}\-[0-9]{2})\_.*\..*

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