Regular Expressions 101

Explanation

Pro

^start of line

Positive Lookahead(?=[^\\\/]*(?:[\\\/][^\\\/]*){0,2}$)

Negated Character Class[^\\\/]*

*matches any number of characters outside the set below:

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Non-Capturing Group(?:[\\\/][^\\\/]*){0,2}

{0,2}repeats the group contents below between 0 and 2 times:

Character Class[\\\/]

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Negated Character Class[^\\\/]*

*matches any number of characters outside the set below:

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

$end of line

Character Class[\d\\\/]{5,10}

{5,10}matches between 5 and 10 characters from the set below:

\da digit

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

$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

^(?=[^\\\/]*(?:[\\\/][^\\\/]*){0,2}$)[\d\\\/]{5,10}$

New

121123/\3465346
5/\3465346
3/\\\01777
3\017773\

121123/\3465346
5/\3465346
3/\\\01777
3\017773\