Regular Expressions 101

Pro

(?si)applies the following effective flags to the remainder of the pattern: si

s modifier: single line. Allows a dot to match line terminators

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

^start of string

Group 1((\s?pol)|(\s?polegadas)|"|''|\x60|'|´|”)?

?repeats the group contents below at most once:

1st Alternative(\s?pol)

Group 2(\s?pol)

\s?optionally matches any whitespace character

polthe literal text pol (case insensitive)

2nd Alternative(\s?polegadas)

Group 3(\s?polegadas)

\s?optionally matches any whitespace character

polegadasthe literal text polegadas (case insensitive)

3rd Alternative"

"the literal " (34₁₀ / 42₈ / 22₁₆)

4th Alternative''

''the literal text ''

5th Alternative\x60

\x60the literal ` (60₁₆ / 140₈ / 96₁₀)

6th Alternative'

'the literal ' (39₁₀ / 47₈ / 27₁₆)

7th Alternative´

´the literal ´ (180₁₀ / 264₈ / B4₁₆)

8th Alternative”

”the literal ” (8221₁₀ / 20035₈ / 201D₁₆)

\s?optionally matches any whitespace character

Group 4(([4-5])((\.|\,)([0-9])+)?)

Group 5([4-5])

Character Class[4-5]

4-5one character from 4 (52₁₀) to 5 (53₁₀)

Group 6((\.|\,)([0-9])+)?

?repeats the group contents below at most once:

Group 7(\.|\,)

1st Alternative\.

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

2nd Alternative\,

\,the literal , (44₁₀ / 54₈ / 2C₁₆)

Group 8([0-9])+

+repeats the group contents below at least once:

Character Class[0-9]

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

$end of string

Global pattern flags

s modifier: single line. Allows a dot to match line terminators

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

(?si)^((\s?pol)|(\s?polegadas)|"|''|\x60|'|´|”)?\s?(([4-5])((\.|\,)([0-9])+)?)$

New

"5.2