Preg_match / split barcode

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

]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

Answer 2

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