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

/
/
x

Test String

Code Generator

Language

Generated Code

$re = '/\A\s* (?: ######################################################################### # Option A: [<Addition to address 1>] <House number> <Street name> # # [<Addition to address 2>] # ######################################################################### (?:(?P<A_Addition_to_address_1>.*?),\s*)? # Addition to address 1 (?:No\.\s*)? (?P<A_House_number_1>\pN+[a-zA-Z]?(?:\s*[-\/\pP]\s*\pN+[a-zA-Z]?)*) # Street name \s*,?\s* (?P<A_Street_name_1>(?:[a-zA-Z]\s*|\pN\pL{2,}\s\pL)\S[^,#]*?(?<!\s)) # House number \s*(?:(?:[,\/]|(?=\#))\s*(?!\s*No\.) (?P<A_Addition_to_address_2>(?!\s).*?))? # Addition to address 2 | ######################################################################### # Option B: [<Addition to address 1>] <Street name> <House number> # # [<Addition to address 2>] # ######################################################################### (?:(?P<B_Addition_to_address_1>.*?),\s*(?=.*[,\/]))? # Addition to address 1 (?!\s*No\.)(?P<B_Street_name>\S\s*\S(?:[^,#](?!\b\pN+\s))*?(?<!\s)) # House number \s*[\/,]?\s*(?:\sNo\.)?\s+ (?P<B_House_number>\pN+\s*-?[a-zA-Z]?(?:\s*[-\/\pP]?\s*\pN+(?:\s*[\-a-zA-Z])?)*|[IVXLCDM]+(?!.*\b\pN+\b))(?<!\s) # Street name \s*(?:(?:[,\/]|(?=\#)|\s)\s*(?!\s*No\.)\s* (?P<B_Addition_to_address_2>(?!\s).*?))? # Addition to address 2 ) \s*\Z/x'; $str = 'Corso XXII Marzo 69'; preg_match($re, $str, $matches, PREG_OFFSET_CAPTURE, 0); // Print the entire match result var_dump($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