Preg_match / split barcode - regex

Question

I am struggeling with reading a GS1-128 barcode, and trying to split it up into the segments it contains, so I can fill out a form automatically.
But I can't figure it out. Scanning my barcode gives me the following:
]d2010704626096200210KT0BT2204[GS]1726090021RNM5F8CTMMBHZSY7
So I tried starting with preg_match and made the following:
/]d2[01]{2}\d{14}[10|17|21]{2}(\w+)/
Which gives me this result:
Array ( [0] => ]d2010704626096200210KT0BT2204 [1] => KT0BT2204 )
Now [1] is actually correct, men [0] isnt, so I have run into a wall.
In the end, this is the result I would like (without 01,10,17,21):
(01) 07046260962002
(10) KT0BT2204
(17) 60900
(21) RNM5F8CTMMBHZSY7
01 - Always 14 chars after
17 - Always 6 chars after
10 can be up to 20 chars, but always has end delimiter <GS> - But if barcode ends with 10 <GS> is not present
21 can be up to 20 chars, but always has end delimiter <GS> - But if barcode ends with 21 <GS> is not present
I tried follwing this question: GS1-128 and RegEx
But I couldnt figure it out.
Anyone that can help me?

Answer 1

This regex should do what you want (note I've split it into separate lines for clarity, you can use it like this with the x (extended) flag, or convert it back to one line):
^]d2(?:
01(?P<g01>.{14})|
10(?P<g10>(?:(?!\[GS]).){1,20})(?:\[GS]|$)|
17(?P<g17>.{6})|
21(?P<g21>(?:(?!\[GS]).){1,20})(?:\[GS]|$)
)+$
It looks for
start-of-line ^ followed by a literal ]d2 then one or more of
01 followed by 14 characters (captured in group g01)
10 followed by up to 20 characters, terminated by either [GS] or end-of-line (captured in group g10)
17 followed by 6 characters (captured in group g17)
21 followed by up to 20 characters, terminated by either [GS] or end-of-line (captured in group g21)
finishing with end-of-line $
Note that we need to use tempered greedy tokens to avoid the situation where a 10 or 21 code might swallow a following code (as in the second example in the regex demo below).
Demo on regex101
In PHP:
$barcode = ']d201070462608682672140097289158930[GS]10101656[GS]17261130';
preg_match_all('/^]d2(?:
01(?P<g01>.{14})|
10(?P<g10>(?:(?!\[GS]).){1,20})(?:\[GS]|$)|
17(?P<g17>.{6})|
21(?P<g21>(?:(?!\[GS]).){1,20})(?:\[GS]|$)
)+$/x', $barcode, $matches);
print_r($matches);
Output:
Array
(
[0] => Array
(
[0] => ]d201070462608682672140097289158930[GS]10101656[GS]17261130
)
[g01] => Array
(
[0] => 07046260868267
)
[1] => Array
(
[0] => 07046260868267
)
[g10] => Array
(
[0] => 101656
)
[2] => Array
(
[0] => 101656
)
[g17] => Array
(
[0] => 261130
)
[3] => Array
(
[0] => 261130
)
[g21] => Array
(
[0] => 40097289158930
)
[4] => Array
(
[0] => 40097289158930
)
)
Demo on 3v4l.org

Answer 2

]d2[01]{2}(\d{14})(?:10|17|21)(\w+)\[GS\](\w+)(?:10|17|21)(\w+)
You can try something like this.
See demo..
https://regex101.com/r/Bw238X/1