Regular Expressions 101

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Group 1([^_\n]*)

Negated Character Class[^_\n]*

*matches any number of characters outside the set below:

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

\na line-feed (newline) character (ASCII 10)

Non-Capturing Group(?:_([^_\n]*)(?:_([^_\n]*))?)?

?repeats the group contents below at most once:

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Group 2([^_\n]*)

Negated Character Class[^_\n]*

*matches any number of characters outside the set below:

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

\na line-feed (newline) character (ASCII 10)

Non-Capturing Group(?:_([^_\n]*))?

?repeats the group contents below at most once:

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Group 3([^_\n]*)

Negated Character Class[^_\n]*

*matches any number of characters outside the set below:

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

\na line-feed (newline) character (ASCII 10)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 4(\w+)

\w+any word character, repeated at least once

$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

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

_([^_\n]*)(?:_([^_\n]*)(?:_([^_\n]*))?)?\.(\w+)$

New

_ParameterA_ParameterB_ParameterC.mp4

Parameter1_Parameter3_Parameter4_ParamaterA_ParameterB_ParamaterC.mp4

_ParamaterA_ParameterB_ParamaterC.mp4

_ParameterB_ParamaterC.mp4

_ParamaterC.mp4

.mp4