There are names of records in which are mixed several types of SKU that may contains symbols, digits, etc.

Examples:

Name of product 67304-4200-52-21
67304-4200-52 Name of product
67304-4200 Name of product
38927/6437 Name of product
BKK1MBM06-02 Name of product
BKK1MBM06 Name of product

I need to preg_match (PHP) only SKU part with any symbols in any combinations.

So i wrote pattern:

/\d \/\d |\d -?\d -?\d -?\d |\bbkk.*\b/i

It works but not with [BKK*] SKU.

Is it way to combine all this types of SKU together in one pattern?

Thanks.

CodePudding user response：

The pattern \d -?\d -?\d -?\d means that there should be at least 4 digits as all the hyphens are optional, but in the example data the part with the numbers have at least a single hyphen, and consist of 2, 3 or 4 parts.

You could repeat the part with the digits and hyphen 1 or more times, and instead of using .*\b use \S*\b to match optional non whitespace chars that will backtrack until the last word boundary.

Note that if you use another delimiter in php than /, you don't have to escape \/

Using a case insensitive match:

\b(?:\d (?:-\d ) |bkk\S*|\d \/\d )\b

Explanation

• \b A word boundary to prevent a partial word match
• (?: Non capture group for the alternatives
  • \d (?:-\d ) Match 1 digits and repeat 1 or more times matching - and again 1 digits (or use {1,3} instead of )
  • | Or
  • bkk\S* Match bkk and optional non whitespace characters
  • | Or
  • \d \/\d Match 1 digits / and 1 digits
• ) Close the non capture group
• \b A word boundary

See a regex101 demo.

CodePudding user response：

Use

\d (?:\d (?:-?\d ){3}|\/\d )|\b[bB][kK][kK][A-Za-z0-9-]*

See regex proof.

REGEX101 EXPLANATION

1st Alternative \d (?:\d (?:-?\d ){3}|\/\d )
\d matches a digit (equivalent to [0-9])
  matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)
Non-capturing group (?:\d (?:-?\d ){3}|\/\d )
1st Alternative \d (?:-?\d ){3}
\d matches a digit (equivalent to [0-9])
  matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)
Non-capturing group (?:-?\d ){3}
{3} matches the previous token exactly 3 times
- matches the character - with index 4510 (2D16 or 558) 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])
  matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)
2nd Alternative \/\d 
\/ matches the character / with index 4710 (2F16 or 578) literally (case sensitive)
\d matches a digit (equivalent to [0-9])
  matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)
2nd Alternative \b[bB][kK][kK][A-Za-z0-9-]*
\b assert position at a word boundary: (^\w|\w$|\W\w|\w\W)
Match a single character present in the list below [bB]
bB matches a single character in the list bB (case sensitive)
Match a single character present in the list below [kK]
kK matches a single character in the list kK (case sensitive)
Match a single character present in the list below [kK]
kK matches a single character in the list kK (case sensitive)
Match a single character present in the list below [A-Za-z0-9-]
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
A-Z matches a single character in the range between A (index 65) and Z (index 90) (case sensitive)
a-z matches a single character in the range between a (index 97) and z (index 122) (case sensitive)
0-9 matches a single character in the range between 0 (index 48) and 9 (index 57) (case sensitive)
- matches the character - with index 4510 (2D16 or 558) literally (case sensitive)