Regular Expressions 101

Pro

^start of string

Group 1([0-9]{9}[0-9X]|[A-Za-z][\dA-Za-z]{9})

1st Alternative[0-9]{9}[0-9X]

Character Class[0-9]{9}

{9}matches exactly 9 characters from the set below:

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

Character Class[0-9X]

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

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

2nd Alternative[A-Za-z][\dA-Za-z]{9}

Character Class[A-Za-z]

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

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

Character Class[\dA-Za-z]{9}

{9}matches exactly 9 characters from the set below:

\da digit

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

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 2([A-Z0-9]{4})

Character Class[A-Z0-9]{4}

{4}matches exactly 4 characters from the set below:

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

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

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

PC_the literal text PC_ (case sensitive)

Group 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 . (46₁₀ / 56₈ / 2E₁₆)

jpgthe literal text jpg (case sensitive)

$end of string, or before its final line terminator

Detailed match information will be displayed here automatically.

25 tokens

^([0-9]{9}[0-9X]|[A-Za-z][\dA-Za-z]{9})\.([A-Z0-9]{4})\.PC_([0-9]{3})\.jpg$

New

B12345678X.MAIN.PC_042.jpg

B12345678X.MAIN.PC_042.jpg