How to make a regex to match string that starts with 0-9 or a-z with accents and must accept only this special character - _ ' between words?

Question

My pattern must match a String that:

Can start with number
Can start with letters with accents or without accents too
Can't start with spaces
Can't start with special characters
Allow spaces between words
Do not accept special character except: - _ '

My current patter is: ^[^_\W][\p{L}\s0-9À-ÖØ-öø-ÿ.'-]+$

Valid examples:

Blockquote

João Antonio

João-Antonio

João's Company

Peter Müller

François Hollande

Patrick O'Brian

Silvana Koch-Mehrin

Invalid examples:

Company N@me

100% Company

\Company

\s Company

_Blockquote

Please help me!

no :( this not work for me, my string must not start with special characters, spaces and whatever character different of numbers and letters. — Vinícius Carneiro de Brito, Apr 07 '20 at 20:29

Florian Fasmeyer · Answer 1 · 2020-04-07T22:39:42.410

0

First letter:

Start with number, letter
Exclude accents and special chars

[^\W_]

Rest of the text:

Include number, letter and accents
Include _, -, ' and

[0-9] & [A-Za-zÀ-ÖØ-öø-ÿ] & [_\-\' ]

Here you are:

^[^\W_][0-9A-Za-zÀ-ÖØ-öø-ÿ_\-\' ]+$

See this question

When you have to deal with complicated Regex, use the Regexr'!

edited Apr 07 '20 at 22:39

answered Apr 07 '20 at 20:13

Florian Fasmeyer

795
5
18

This not work for me, my string must not start with special characters, spaces and whatever character different of numbers and letters. – Vinícius Carneiro de Brito Apr 07 '20 at 20:29
Hey, did you modify your valid examples? haha, _Blockquote was part of it! Whatever, I corrected my code for you. <3 But man, you MUST know how to use RegEx. This is basic knowledge you must have as a scientist. I know, it's not fun, bt you have to! PLEASE, USE https://regex101.com/ or https://regexr.com/. You will learn quickly and become a pro at it! – Florian Fasmeyer Apr 07 '20 at 22:43
Yes i modified and guy I asked because I needed help. – Vinícius Carneiro de Brito Apr 08 '20 at 12:28

Vinícius Carneiro de Brito · Answer 2 · 2020-04-07T20:49:47.857

0

My best was:

/^[^_\W][\p{L}\s0-9À-ÖØ-öø-ÿ.'-]+$/gi

Test: https://regexr.com/521r2

edited Apr 07 '20 at 20:49

answered Apr 07 '20 at 20:37

Vinícius Carneiro de Brito

130
1
13

Khanna111 · Answer 3 · 2020-04-08T20:57:20.993

I think the requirements are not too clear but based on your examples:

^[a-zA-ZÀ-ÖØ-öø-ÿ][ '_-a-zA-ZÀ-ÖØ-öø-ÿ]+$


^                        = beginning of line
$                        = end of line
[a-zA-ZÀ-ÖØ-öø-ÿ]        = matches all these characters specified including one with accents
[ '_-a-zA-ZÀ-ÖØ-öø-ÿ]    = same as above except it includes the quote, blank space, underscore
+                        = one or more (greedy)

See this for more details and examples link

Best.

How to make a regex to match string that starts with 0-9 or a-z with accents and must accept only this special character - _ ' between words?

3 Answers3