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

/
/
msg

Test String

Code Generator

Language

Generated Code

$re = '/(^-----BEGIN CERTIFICATE-----.*?-----END CERTIFICATE-----)$/ms'; $str = 'CONNECTED(000001E4) --- Certificate chain 0 s:/C=US/ST=California/L=Mountain View/O=Google Inc/CN=google.com i:/C=US/O=Google Inc/CN=Google Internet Authority G2 -----BEGIN CERTIFICATE----- MIIf0jCCHrqgAwIBAgIIGZoxm9FoLX0wDQYJKoZIhvcNAQELBQAwSTELMAkGA1UE BhMCVVMxEzARBgNVBAoTCkdvb2dsZSBJbmMxJTAjBgNVBAMTHEdvb2dsZSBJbnRl cm5ldCBBdXRob3JpdHkgRzIwHhcNMTUwODEyMTUxMTExWhcNMTUxMTEwMDAwMDAw WjBkMQswCQYDVQQGEwJVUzETMBEGA1UECAwKQ2FsaWZvcm5pYTEWMBQGA1UEBwwN TW91bnRhaW4gVmlldzETMBEGA1UECgwKR29vZ2xlIEluYzETMBEGA1UEAwwKZ29v Z2xlLmNvbTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBALpjSPhP5nwn VIHIruTW2NjRtqIadKQCyDzDrWD982PtaU4FRvkgFwhTo6VOvJ3oWZqIBlC4NT9+ lwKjVDoUNE2Jevl5+pOiBdPlzVfcxG5sywAn07K8WYJSh58olAJZnxKRRBeKZDTB FtFPci2CAHGN69aN6YfLjB48BHTzSkpFY6wwCDvab7uuR8Ms3Hls8BU6rMt4Ju+y V7EULMo0RXD3d4qY4dFreLpnEYaJCSzyYCLdMJB3VoVMb4sOVlfsRE/kQaK5TcIx GYNmHvNJ0IdrFZ/hcSuI/52nfPw/jrMindhz7fTKmgrveCTFyXx/c8ipUdU6wQt7 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PeE4uwc2hGKceeoWMPRfwCvocWvk+QIDAQABo4HwMIHtMB8GA1UdIwQYMBaAFEjm aPkr0rKV10fYIyAQTzOYkJ/UMB0GA1UdDgQWBBTAephojYn7qwVkDBF9qn1luMrM TjAPBgNVHRMBAf8EBTADAQH/MA4GA1UdDwEB/wQEAwIBBjA6BgNVHR8EMzAxMC+g LaArhilodHRwOi8vY3JsLmdlb3RydXN0LmNvbS9jcmxzL3NlY3VyZWNhLmNybDBO BgNVHSAERzBFMEMGBFUdIAAwOzA5BggrBgEFBQcCARYtaHR0cHM6Ly93d3cuZ2Vv dHJ1c3QuY29tL3Jlc291cmNlcy9yZXBvc2l0b3J5MA0GCSqGSIb3DQEBBQUAA4GB AHbhEm5OSxYShjAGsoEIz/AIx8dxfmbuwu3UOx//8PDITtZDOLC5MH0Y0FWDomrL NhGc6Ehmo21/uBPUR/6LWlxz/K7ZGzIZOKuXNBSqltLroxwUCEm2u+WR74M26x1W b8ravHNjkOR/ez4iyz0H7V84dJzjA1BOoa+Y7mHyhD8S -----END CERTIFICATE----- --- Server certificate subject=/C=US/ST=California/L=Mountain View/O=Google Inc/CN=google.com issuer=/C=US/O=Google Inc/CN=Google Internet Authority G2 --- No client certificate CA names sent --- SSL handshake has read 10215 bytes and written 438 bytes --- New, TLSv1/SSLv3, Cipher is RC4-SHA Server public key is 2048 bit Compression: NONE Expansion: NONE SSL-Session: Protocol : TLSv1 Cipher : RC4-SHA Session-ID: 8EBB979A96C58F5D6B0CF33E01F12D096E201DF6C49DA77ED00FA7B9F5272C08 Session-ID-ctx: Master-Key: 01AEE29DA7182701AEC2F6EEAFC52D0A334983BBBBD26E4176B11B66703FFC8A8E6B49149B2624F8E15997B325CB15DE Key-Arg : None Start Time: 1440342367 Timeout : 300 (sec) Verify return code: 20 (unable to get local issuer certificate) --- '; 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