Regular Expressions 101

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/
^\s[+-](\d-((00[1-9]|0[1-9]\d|[12]\d\d|3[0-5]\d|36[0-5])|(0[1-9]|1[0-2])-(0[1-9]|1\d|2[0-8])|(0[13-9]|1[0-2])-(29|30)|(0[13578]|1[02])-31|W(0[1-9]|[1-4]\d|5[0-2])-[1-7]))|((\d([13579][26]|[2468][048]|0[48])|(\d([13579][26]|[02468][048])00))-(366|02-29))|(\+\d(([02468][048]|[13579][26])([26]0|71|[38]2|[49]3|[05]4|15|[27]6|37|[48]8|[09]9)|([02468][159]|[13579][37])(50|[16]1|[27]2|33|[48]4|[09]5|[15]6|67|[27]8|[38]9)|([02468][26]|[13579][048])([48]0|[09]1|[15]2|63|[27]4|[38]5|[49]6|[05]7|[16]8|29)|([02468][37]|[13579][159])([27]0|[38]1|[49]2|[05]3|[16]4|25|[37]6|87|[049]8|[5]9))|-\d(([02468][048]|[13579][26])(0[28]|1[39]|24|3[06]|4[17]|5[28]|6[49]|75|8[06]|9[27])|([02468][159]|[13579][37])(0[49]|15|2[06]|3[27]|4[38]|54|6[05]|7[16]|8[28]|9[39])|([02468][26]|[13579][048])(0[51]|16|2[28]|3[39]|44|5[06]|6[17]|7[28]|8[49]|95)|([02468][37]|[13579][159])(0[17]|1[28]|2[49]|35|4[06]|5[27]|6[38]|74|8[05]|9[16])))-W53-[1-7]\s$
/
gm
1st Alternative
^\s[+-](\d-((00[1-9]|0[1-9]\d|[12]\d\d|3[0-5]\d|36[0-5])|(0[1-9]|1[0-2])-(0[1-9]|1\d|2[0-8])|(0[13-9]|1[0-2])-(29|30)|(0[13578]|1[02])-31|W(0[1-9]|[1-4]\d|5[0-2])-[1-7]))
^ asserts position at start of a line
\s
matches any whitespace character (equivalent to [\r\n\t\f\v ])
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
Match a single character present in the list below
[+-]
? matches the previous token between zero and one times, as many times as possible, giving back as needed (greedy)
+- matches a single character in the list +- (case sensitive)
1st Capturing Group
(\d-((00[1-9]|0[1-9]\d|[12]\d\d|3[0-5]\d|36[0-5])|(0[1-9]|1[0-2])-(0[1-9]|1\d|2[0-8])|(0[13-9]|1[0-2])-(29|30)|(0[13578]|1[02])-31|W(0[1-9]|[1-4]\d|5[0-2])-[1-7]))
\d
matches a digit (equivalent to [0-9])
{4,10} matches the previous token between 4 and 10 times, as many times as possible, giving back as needed (greedy)
- matches the character - literally (case sensitive)
2nd Capturing Group
((00[1-9]|0[1-9]\d|[12]\d\d|3[0-5]\d|36[0-5])|(0[1-9]|1[0-2])-(0[1-9]|1\d|2[0-8])|(0[13-9]|1[0-2])-(29|30)|(0[13578]|1[02])-31|W(0[1-9]|[1-4]\d|5[0-2])-[1-7])
1st Alternative
(00[1-9]|0[1-9]\d|[12]\d\d|3[0-5]\d|36[0-5])
3rd Capturing Group
(00[1-9]|0[1-9]\d|[12]\d\d|3[0-5]\d|36[0-5])
2nd Alternative
(0[1-9]|1[0-2])-(0[1-9]|1\d|2[0-8])
3rd Alternative
(0[13-9]|1[0-2])-(29|30)
4th Alternative
(0[13578]|1[02])-31
5th Alternative
W(0[1-9]|[1-4]\d|5[0-2])-[1-7]
2nd Alternative
((\d([13579][26]|[2468][048]|0[48])|(\d([13579][26]|[02468][048])00))-(366|02-29))
10th Capturing Group
((\d([13579][26]|[2468][048]|0[48])|(\d([13579][26]|[02468][048])00))-(366|02-29))
11th Capturing Group
(\d([13579][26]|[2468][048]|0[48])|(\d([13579][26]|[02468][048])00))
1st Alternative
\d([13579][26]|[2468][048]|0[48])
\d
matches a digit (equivalent to [0-9])
{2,8} matches the previous token between 2 and 8 times, as many times as possible, giving back as needed (greedy)
12th Capturing Group
([13579][26]|[2468][048]|0[48])
1st Alternative
[13579][26]
Match a single character present in the list below
[13579]
13579 matches a single character in the list 13579 (case sensitive)
Match a single character present in the list below
[26]
2nd Alternative
[2468][048]
Match a single character present in the list below
[2468]
Match a single character present in the list below
[048]
3rd Alternative
0[48]
2nd Alternative
(\d([13579][26]|[02468][048])00)
13th Capturing Group
(\d([13579][26]|[02468][048])00)
\d
matches a digit (equivalent to [0-9])
{0,6} matches the previous token between 0 and 6 times, as many times as possible, giving back as needed (greedy)
14th Capturing Group
([13579][26]|[02468][048])
00 matches the characters 00 literally (case sensitive)
- matches the character - literally (case sensitive)
15th Capturing Group
(366|02-29)
1st Alternative
366
366 matches the characters 366 literally (case sensitive)
2nd Alternative
02-29
02-29 matches the characters 02-29 literally (case sensitive)
3rd Alternative
(\+\d(([02468][048]|[13579][26])([26]0|71|[38]2|[49]3|[05]4|15|[27]6|37|[48]8|[09]9)|([02468][159]|[13579][37])(50|[16]1|[27]2|33|[48]4|[09]5|[15]6|67|[27]8|[38]9)|([02468][26]|[13579][048])([48]0|[09]1|[15]2|63|[27]4|[38]5|[49]6|[05]7|[16]8|29)|([02468][37]|[13579][159])([27]0|[38]1|[49]2|[05]3|[16]4|25|[37]6|87|[049]8|[5]9))|-\d(([02468][048]|[13579][26])(0[28]|1[39]|24|3[06]|4[17]|5[28]|6[49]|75|8[06]|9[27])|([02468][159]|[13579][37])(0[49]|15|2[06]|3[27]|4[38]|54|6[05]|7[16]|8[28]|9[39])|([02468][26]|[13579][048])(0[51]|16|2[28]|3[39]|44|5[06]|6[17]|7[28]|8[49]|95)|([02468][37]|[13579][159])(0[17]|1[28]|2[49]|35|4[06]|5[27]|6[38]|74|8[05]|9[16])))-W53-[1-7]\s$
16th Capturing Group
(\+\d(([02468][048]|[13579][26])([26]0|71|[38]2|[49]3|[05]4|15|[27]6|37|[48]8|[09]9)|([02468][159]|[13579][37])(50|[16]1|[27]2|33|[48]4|[09]5|[15]6|67|[27]8|[38]9)|([02468][26]|[13579][048])([48]0|[09]1|[15]2|63|[27]4|[38]5|[49]6|[05]7|[16]8|29)|([02468][37]|[13579][159])([27]0|[38]1|[49]2|[05]3|[16]4|25|[37]6|87|[049]8|[5]9))|-\d(([02468][048]|[13579][26])(0[28]|1[39]|24|3[06]|4[17]|5[28]|6[49]|75|8[06]|9[27])|([02468][159]|[13579][37])(0[49]|15|2[06]|3[27]|4[38]|54|6[05]|7[16]|8[28]|9[39])|([02468][26]|[13579][048])(0[51]|16|2[28]|3[39]|44|5[06]|6[17]|7[28]|8[49]|95)|([02468][37]|[13579][159])(0[17]|1[28]|2[49]|35|4[06]|5[27]|6[38]|74|8[05]|9[16])))
1st Alternative
\+\d(([02468][048]|[13579][26])([26]0|71|[38]2|[49]3|[05]4|15|[27]6|37|[48]8|[09]9)|([02468][159]|[13579][37])(50|[16]1|[27]2|33|[48]4|[09]5|[15]6|67|[27]8|[38]9)|([02468][26]|[13579][048])([48]0|[09]1|[15]2|63|[27]4|[38]5|[49]6|[05]7|[16]8|29)|([02468][37]|[13579][159])([27]0|[38]1|[49]2|[05]3|[16]4|25|[37]6|87|[049]8|[5]9))
\+
matches the character + literally (case sensitive)
? matches the previous token between zero and one times, as many times as possible, giving back as needed (greedy)
\d
matches a digit (equivalent to [0-9])
{0,6} matches the previous token between 0 and 6 times, as many times as possible, giving back as needed (greedy)
17th Capturing Group
(([02468][048]|[13579][26])([26]0|71|[38]2|[49]3|[05]4|15|[27]6|37|[48]8|[09]9)|([02468][159]|[13579][37])(50|[16]1|[27]2|33|[48]4|[09]5|[15]6|67|[27]8|[38]9)|([02468][26]|[13579][048])([48]0|[09]1|[15]2|63|[27]4|[38]5|[49]6|[05]7|[16]8|29)|([02468][37]|[13579][159])([27]0|[38]1|[49]2|[05]3|[16]4|25|[37]6|87|[049]8|[5]9))
1st Alternative
([02468][048]|[13579][26])([26]0|71|[38]2|[49]3|[05]4|15|[27]6|37|[48]8|[09]9)
18th Capturing Group
([02468][048]|[13579][26])
1st Alternative
[02468][048]
2nd Alternative
[13579][26]
19th Capturing Group
([26]0|71|[38]2|[49]3|[05]4|15|[27]6|37|[48]8|[09]9)
2nd Alternative
([02468][159]|[13579][37])(50|[16]1|[27]2|33|[48]4|[09]5|[15]6|67|[27]8|[38]9)
20th Capturing Group
([02468][159]|[13579][37])
21st Capturing Group
(50|[16]1|[27]2|33|[48]4|[09]5|[15]6|67|[27]8|[38]9)
3rd Alternative
([02468][26]|[13579][048])([48]0|[09]1|[15]2|63|[27]4|[38]5|[49]6|[05]7|[16]8|29)
4th Alternative
([02468][37]|[13579][159])([27]0|[38]1|[49]2|[05]3|[16]4|25|[37]6|87|[049]8|[5]9)
2nd Alternative
-\d(([02468][048]|[13579][26])(0[28]|1[39]|24|3[06]|4[17]|5[28]|6[49]|75|8[06]|9[27])|([02468][159]|[13579][37])(0[49]|15|2[06]|3[27]|4[38]|54|6[05]|7[16]|8[28]|9[39])|([02468][26]|[13579][048])(0[51]|16|2[28]|3[39]|44|5[06]|6[17]|7[28]|8[49]|95)|([02468][37]|[13579][159])(0[17]|1[28]|2[49]|35|4[06]|5[27]|6[38]|74|8[05]|9[16]))
- matches the character - literally (case sensitive)
\d
matches a digit (equivalent to [0-9])
{0,6} matches the previous token between 0 and 6 times, as many times as possible, giving back as needed (greedy)
26th Capturing Group
(([02468][048]|[13579][26])(0[28]|1[39]|24|3[06]|4[17]|5[28]|6[49]|75|8[06]|9[27])|([02468][159]|[13579][37])(0[49]|15|2[06]|3[27]|4[38]|54|6[05]|7[16]|8[28]|9[39])|([02468][26]|[13579][048])(0[51]|16|2[28]|3[39]|44|5[06]|6[17]|7[28]|8[49]|95)|([02468][37]|[13579][159])(0[17]|1[28]|2[49]|35|4[06]|5[27]|6[38]|74|8[05]|9[16]))
1st Alternative
([02468][048]|[13579][26])(0[28]|1[39]|24|3[06]|4[17]|5[28]|6[49]|75|8[06]|9[27])
27th Capturing Group
([02468][048]|[13579][26])
28th Capturing Group
(0[28]|1[39]|24|3[06]|4[17]|5[28]|6[49]|75|8[06]|9[27])
2nd Alternative
([02468][159]|[13579][37])(0[49]|15|2[06]|3[27]|4[38]|54|6[05]|7[16]|8[28]|9[39])
3rd Alternative
([02468][26]|[13579][048])(0[51]|16|2[28]|3[39]|44|5[06]|6[17]|7[28]|8[49]|95)
4th Alternative
([02468][37]|[13579][159])(0[17]|1[28]|2[49]|35|4[06]|5[27]|6[38]|74|8[05]|9[16])
-W53- matches the characters -W53- literally (case sensitive)
Match a single character present in the list below
[1-7]
1-7 matches a single character in the range between 1 (index 49) and 7 (index 55) (case sensitive)
\s
matches any whitespace character (equivalent to [\r\n\t\f\v ])
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
$ asserts position at the end of a line
Global pattern flags
g modifier: global. All matches (don't return after first match)
m modifier: multi line. Causes ^ and $ to match the begin/end of each line (not only begin/end of string)
Your regular expression does not match the subject string.Try launching the debugger to find out why.

Regular Expression
No Match

/
/
gm

Test String