Regular Expressions 101

Explanation

Pro

^start of line

Non-Capturing Group(?:(?:(?:0[1-9]|[1-8]\d|9[0-5])(?:\d{3})?)|97[1-8]|98[4-9]|2[abAB])

1st Alternative(?:(?:0[1-9]|[1-8]\d|9[0-5])(?:\d{3})?)

Non-Capturing Group(?:(?:0[1-9]|[1-8]\d|9[0-5])(?:\d{3})?)

Non-Capturing Group(?:0[1-9]|[1-8]\d|9[0-5])

1st Alternative0[1-9]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[1-9]

1-9one character from 1 (49₁₀) to 9 (57₁₀)

2nd Alternative[1-8]\d

Character Class[1-8]

1-8one character from 1 (49₁₀) to 8 (56₁₀)

\da digit

3rd Alternative9[0-5]

9the literal 9 (57₁₀ / 71₈ / 39₁₆)

Character Class[0-5]

0-5one character from 0 (48₁₀) to 5 (53₁₀)

Non-Capturing Group(?:\d{3})?

?repeats the group contents below at most once:

\d{3}a digit, repeated exactly 3 times

2nd Alternative97[1-8]

97the literal text 97

Character Class[1-8]

1-8one character from 1 (49₁₀) to 8 (56₁₀)

3rd Alternative98[4-9]

98the literal text 98

Character Class[4-9]

4-9one character from 4 (52₁₀) to 9 (57₁₀)

4th Alternative2[abAB]

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[abAB]

athe literal a (97₁₀ / 141₈ / 61₁₆) (case sensitive)

bthe literal b (98₁₀ / 142₈ / 62₁₆) (case sensitive)

Athe literal A (65₁₀ / 101₈ / 41₁₆) (case sensitive)

Bthe literal B (66₁₀ / 102₈ / 42₁₆) (case sensitive)

$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[1-9]|[1-8]\d|9[0-5])(?:\d{3})?)|97[1-8]|98[4-9]|2[abAB])$

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