Regular Expressions 101

Pro

^start of string

Group 1(_img_cache/([[:xdigit:]])/([[:xdigit:]])/\2\3[[:xdigit:]]{38})

_img_cache/the literal text _img_cache/ (case sensitive)

Group 2([[:xdigit:]])

Character Class[[:xdigit:]]

[:xdigit:]a hexadecimal digit [A-Fa-f0-9]

/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 3([[:xdigit:]])

Character Class[[:xdigit:]]

[:xdigit:]a hexadecimal digit [A-Fa-f0-9]

/the literal / (47₁₀ / 57₈ / 2F₁₆)

\2the text saved by group 2

\3the text saved by group 3

Character Class[[:xdigit:]]{38}

{38}matches exactly 38 characters from the set below:

[:xdigit:]a hexadecimal digit [A-Fa-f0-9]

/the literal / (47₁₀ / 57₈ / 2F₁₆)

.+any character (except for line terminators), repeated at least once

Detailed match information will be displayed here automatically.

25 tokens

^(_img_cache/([[:xdigit:]])/([[:xdigit:]])/\2\3[[:xdigit:]]{38})/.+

New

_img_cache/a/3/a3a37b602a1df1addfc8f2ff5a9824e1c9bd5273/OriginalFilename.jpg

_img_cache/a/3/a3a37b602a1df1addfc8f2ff5a9824e1c9bd5273/OriginalFilename.jpg