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

/
/
gms

Test String

Code Generator

Language

Generated Code

$re = '/Nmap scan report for scanme\.nmap\.org.*?(22|31337)\/tcp.*?(?=(Read data|Nmap scan))/ms'; $str = 'Nmap scan report for scanme.nmap.org ([external-ip]) Host is up (0.082s latency). Other addresses for scanme.nmap.org (not scanned): 2600:3c01::f03c:91ff:fe18:bb2f Not shown: 992 closed tcp ports (reset) PORT STATE SERVICE 22/tcp open ssh 25/tcp filtered smtp 80/tcp filtered http 135/tcp filtered msrpc 139/tcp filtered netbios-ssn 445/tcp filtered microsoft-ds 9929/tcp open nping-echo 31337/tcp open Elite Read data files from: /usr/bin/../share/nmap # Nmap done at Tue Oct 11 01:08:22 2022 -- 1 IP address (1 host up) scanned in 2.31 seconds Nmap scan report for scanme.nmap.org ([external-ip]) Host is up (0.082s latency). Other addresses for scanme.nmap.org (not scanned): 2600:3c01::f03c:91ff:fe18:bb2f Not shown: 992 closed tcp ports (reset) PORT STATE SERVICE 22/tcp open ssh 25/tcp filtered smtp 80/tcp filtered http 135/tcp filtered msrpc 139/tcp filtered netbios-ssn 445/tcp filtered microsoft-ds 9929/tcp open nping-echo 31337/tcp open Elite Read data files from: /usr/bin/../share/nmap # Nmap done at Tue Oct 11 01:08:22 2022 -- 1 IP address (1 host up) scanned in 2.31 seconds'; preg_match_all($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