regex101: Validate comma-separated list of values (allowed: words; digits; special characters; single non-trailing non-leading spa

Pro

^start of line

Non-Capturing Group(?:(([\d\p{L}\-_$&+:;=?@#|!\.]+ )*[\d\p{L}\-_$&+:;=?@#|!\.]+)++,)*+

*+repeats the group contents below any number of times:

Group 1(([\d\p{L}\-_$&+:;=?@#|!\.]+ )*[\d\p{L}\-_$&+:;=?@#|!\.]+)++

++repeats the group contents below at least once:

Group 2([\d\p{L}\-_$&+:;=?@#|!\.]+ )*

*repeats the group contents below any number of times:

Character Class[\d\p{L}\-_$&+:;=?@#|!\.]+

+matches at least one character from the set below:

\da digit

\p{L}any Unicode letter

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

$the literal $ (36₁₀ / 44₈ / 24₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

#the literal # (35₁₀ / 43₈ / 23₁₆)

|the literal | (124₁₀ / 174₈ / 7C₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

Character Class[\d\p{L}\-_$&+:;=?@#|!\.]+

+matches at least one character from the set below:

\da digit

\p{L}any Unicode letter

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

$the literal $ (36₁₀ / 44₈ / 24₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

#the literal # (35₁₀ / 43₈ / 23₁₆)

|the literal | (124₁₀ / 174₈ / 7C₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Group 3(([\d\p{L}\-_$&+:;=?@#|!\.]+ )*[\d\p{L}\-_$&+:;=?@#|!\.]+)++

++repeats the group contents below at least once:

Group 4([\d\p{L}\-_$&+:;=?@#|!\.]+ )*

*repeats the group contents below any number of times:

Character Class[\d\p{L}\-_$&+:;=?@#|!\.]+

+matches at least one character from the set below:

\da digit

\p{L}any Unicode letter

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

$the literal $ (36₁₀ / 44₈ / 24₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

#the literal # (35₁₀ / 43₈ / 23₁₆)

|the literal | (124₁₀ / 174₈ / 7C₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

Character Class[\d\p{L}\-_$&+:;=?@#|!\.]+

+matches at least one character from the set below:

\da digit

\p{L}any Unicode letter

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

$the literal $ (36₁₀ / 44₈ / 24₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

#the literal # (35₁₀ / 43₈ / 23₁₆)

|the literal | (124₁₀ / 174₈ / 7C₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

$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

25 tokens

Regular Expression

^(?:(([\d\p{L}\-_$&+:;=?@#|!\.]+ )*[\d\p{L}\-_$&+:;=?@#|!\.]+)++,)*+(([\d\p{L}\-_$&+:;=?@#|!\.]+ )*[\d\p{L}\-_$&+:;=?@#|!\.]+)++$

1,2
1 1,2
a@b.com,a


1,
,1
1,,2