Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
No Match

/
/
gm

Test String

Code Generator

Language

Generated Code

$re = '/^([A-Z]{2}[ \-]?[0-9]{2})(?=(?:[ \-]?[A-Z0-9]){9,30}$)((?:[ \-]?[A-Z0-9]{3,5}){2,7})([ \-]?[A-Z0-9]{1,3})?$/m'; $str = 'XX00 1234 5678 9012 3456 7890 1234 5678 90 YY00123456789012345678901234567890 ---- AL28 BBB SSSSK CCCC CCCC CCCC CCCC AD24-BBBB-SSSS-CCCC-CCCC-CCCC BE16 BBBC CCCC CCKK BA20 BBBS SSCC CCCC CCKK BG22-BBBB-SSSS-DDCC-CCCC-CC CY28 BBBS SSSS CCCC CCCC CCCC CCCC DK18 BBBB CCCC CCCC CC DE22 BBBB BBBB CCCC CCCC CC EE20 BBSS CCCC CCCC CCCK FO18 CCCC CCCC CCCC CC FI18 BBBB BBCC CCCC CK FR27 BBBB BSSS SSCC CCCC CCCC CKK GE22 BBCC CCCC CCCC CCCC CC GI23 BBBB CCCC CCCC CCCC CCC GR27 BBBS SSSC CCCC CCCC CCCC CCC GL18 BBBB CCCC CCCC CC HU28 BBBS SSSK CCCC CCCC CCCC CCCK IE22 BBBB SSSS SSCC CCCC CC IS26 BBBB TTCC CCCC XXXX XXXX XX IL23 BBB SSS CCCCCCCCCCCCC IT27 KBBB BBSS SSSC CCCC CCCC CCC JO27 BBBB CCCC CCCC CCCC CCCC CCCC CC HR21 BBBB BBBC CCCC CCCC C LV21 BBBB CCCC CCCC CCCC C LB28 BBBB CCCC CCCC CCCC CCCC CCCC CC LI21 BBBB BCCC CCCC CCCC C LT20 BBBB BCCC CCCC CCCC LU20 BBBC CCCC CCCC CCCC MK19 BBBC CCCC CCCC CKK MT31 BBBB SSSS SCCC CCCC CCCC CCCC CCC MU30 BBBB BBSS CCCC CCCC CCCC RRRD DD MC27 BBBB BSSS SSCC CCCC CCCC CKK ME22 BBBC CCCC CCCC CCCC KK NL18 BBBB CCCC CCCC CK NO15 BBBB CCCC CCK AT20 BBBB BCCC CCCC CCCC PL28 BBBS SSSK CCCC CCCC CCCC CCCC PT25 BBBB SSSS CCCC CCCC CCCK K RO24 BBBB CCCC CCCC CCCC CCCC SM27 KBBB BBSS SSSX XXXX XXXX XXX SA24 BBCC CCCC CCCC CCCC CCCC RS22 BBBC CCCC CCCC CCCC KK SK24 BBBB SSSS SSCC CCCC CCCC SI19 BBSS SCCC CCCC CKK ES24 BBBB SSSS KKCC CCCC CCCC CZ24 BBBB SSSS SSCC CCCC CCCC TR26 BBBB BRCC CCCC CCCC CCCC CC TN24 BBBB BCCC CCCC CCCC CCCC GB22 BBBB SSSS SSCC CCCC CC AE23 BBBB SSSS CCCC CCCC CCC SE24 BBBB CCCC CCCC CCCC CCCC CH21 BBBB BCCC CCCC CCCC C'; preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0); // Print the entire match result var_dump($matches);

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php