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 = '/Computer\s+name:\s+(?<Computer_Name>[^,]+)/m'; $str = '2020-07-04 21:36:33,Compressed File,IP Address: 192.168.1.1,Computer name: GHCC01SFG435,Source: Scheduled scan,Risk name: Heur.AdvML.B,Occurrences: 1,File path: T:\\Tower\\Installer\\fgg5cfef.msi,Description: Still contains 1 infected items,Actual action: Quarantined,Requested action: Quarantined,Secondary action: Left alone,Event time: 2020-07-04 21:33:58,Event Insert Time: 2020-07-04 21:36:33,End Time: 2020-07-04 21:33:58,Last update time: 2020-07-04 21:36:33,Domain Name: Default,Group Name: My Company\\HODW - Server\\HODW - Development,Server Name: FGTY1ADA02,User Name: SYSTEM,Source Computer Name: ,Source Computer IP: ,Disposition: Good,Download site: null,Web domain: null,Downloaded by: null,Prevalence: Reputation was not used in this detection.,Confidence: Reputation was not used in this detection.,URL Tracking Status: Off,First Seen: Reputation was not used in this detection.,Sensitivity: Low,Permitted application reason: Not on the permitted application list,Application hash: ,Hash type: SHA1,Company name: ,Application name: ,Application version: ,Application type: -1,File size (bytes): 0,Category set: Malware,Category type: Heuristic Virus,Location: Default,Intensive Protection Level: 0,Certificate issuer: ,Certificate signer: ,Certificate thumbprint: ,Signing timestamp: ,Certificate serial number: 2020-07-08 11:59:34,Virus found,IP Address: 172.16.10.151,Computer name: U1135713,Source: Auto-Protect scan,Risk name: Heur.AdvML.C,Occurrences: 1,File path: C:\\Windows\\DVV\\v4.0.6\\namespace\\hodw.tergtaw.fnd\\user\\user0\\IUWGR\\personal work\\maliciousfile.exe,Description: ,Actual action: Deleted,Requested action: Cleaned,Secondary action: Deleted,Event time: 2020-07-08 11:55:57,Event Insert Time: 2020-07-08 11:59:34,End Time: 2020-07-08 11:55:57,Last update time: 2020-07-08 11:59:34,Domain Name: Default,Group Name: My Company\\HODW - Server\\HODW - HODW\\HODW - Windows 10\\HODW - BHTPN - Online Default,Server Name: FGTY1ADA02,User Name: IUWGR,Source Computer Name: U1135713. hodw.tergtaw.fnd,Source Computer IP: 127.0.0.1,Disposition: Bad,Download site: ,Web domain: ,Downloaded by: svchost.exe,Prevalence: This file has been seen by hundreds of Symantec users.,Confidence: This file is untrustworthy.,URL Tracking Status: On,First Seen: Symantec has known about this file for more than 1 year.,Sensitivity: ,Permitted application reason: Not on the permitted application list,Application hash: 500D8BB5500663G76016C16C377518E700287332406A5FAF3FDC8E87FBF51273,Hash type: SHA2,"Company name: W3i, LLC",Application name: Brueze.com Installation Utility,Application version: 1, 0, 36, 0,Application type: 127,File size (bytes): 12680312,Category set: Malware,Category type: Heuristic Virus,Location: BHTPN - TPN Connected (Wireless-Mobile),Intensive Protection Level: 0,"Certificate issuer: W3i,LLC",Certificate signer: VeriSign Class 3 Code Signing 2004 CA,Certificate thumbprint: C1102EA03313E71D4E3C771A823E152375CDEF4E,Signing timestamp: 0,Certificate serial number: 391B1DE3FDF7D68124136D1483C16B21'; 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