Reputation: 23

Regular expression limit a match with string matched before

I need match a space but limit the matched with space with some condition..

Source :
Code AS-277 Red/Yellow
Code AS 278 Red:
Code AS 279;
Code AS-280 red;
Code AS 279/

UPDATE :
Needed Result:
1. match all word [\w] and few special char [ _-+*] for code 
2. Stop char is [/;)] and COLOR CONSTAN [BLUE|YELLOW|ETC]
3. case insensitive

AS-277 
AS 278
AS 279 
AS-280

I write on regex101.com https://regex101.com/r/S6mvZF/2

Upvotes: 2

Answers (4)

Wiktor Stribiżew

Reputation: 626845

It seems you may use

'~Code\s+([\w+*]+(?:[-\s][\w+*]+)*?\b)\s?(?:red|blue|green|yellow|[);/])~i'

See the regex demo

Details

Code - a substring
\s+ - 1 or more whitespaces
[\w+*]+ - 1 or more letters, digits, _, * or +
(?:[-\s][\w+*]+)*? - zero or more (but as few as possible) sequences of:
- [-\s] - a - or whitespace
- [\w+*]+ - 1 or more letters, digits, _, * or +
\b - a word boundary (i.e. there must be a non-word char (non-letter, non-digit and non-_)
\s? - 1 or 0 whitespaces
(?:red|blue|green|yellow|[);/]) - one of the alternatives: red, blue, green, yellow (add more after |), or [);/] - a ), ; or /.

Grab Group 1 value upon a match.

Upvotes: 1

chris85

Reputation: 23892

You could do:

$string = preg_replace('/^.*Code (AS[- ]\d+).*$/m', '$1', $string);

Demo: https://regex101.com/r/S6mvZF/4

preg_match_all('/Code (AS[- ]\d+)/, $string, $matches);

and then $matches[1] will have all your matches.

Both regexes look for Code AS, then a hyphen or space, and then at least one number (if decimal places are limited a range can be applied {1,3}). The first regex goes line by line. The second just captures each match.

Demo: https://regex101.com/r/S6mvZF/5

Upvotes: 1