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

/
/
g

Test String

Substitution

Processing...

Code Generator

Language

Generated Code

$re = '/("Data": \[{".*})",/'; $str = '[so much data exists in the same single line ] ,"Comments": "New alert", "Data": [{"etype":"MalwareFamily","at":"2024-06-21T11:34:07.0000000Z","md":"2024-06-21T11:34:07.0000000Z","Investigations":[{"$id":"1","Id":"urn:ZappedUrlInvestigation:2cc87ae3","InvestigationStatus":"Running"}],"InvestigationIds":["urn:ZappedUrlInvestigation:2cc8782d063"],"Intent":"Probing","ResourceIdentifiers":[{"$id":"2","AadTenantId":"2dfb29-729c918","Type":"AAD"}],"AzureResourceId":null,"WorkspaceId":null,"Metadata":{"CustomApps":null,"GenericInfo":null},"Entities":[{"$id":"3","MailboxPrimaryAddress":"abc@gmail.com","Upn":"abc@gmail.com","AadId":"6eac3b76357","RiskLevel":"None","Type":"mailbox","Urn":"urn:UserEntity:10338af2b6c","Source":"TP","FirstSeen":"0001-01-01T00:00:00"}, "StartTimeUtc": "2024-06-21T10:12:37", "Status": "Investigation Started"}", "EntityType": "MalwareFamily", [so much data exists in the same single line ] '; $subst = "$1],"; $result = preg_replace($re, $subst, $str); echo "The result of the substitution is ".$result;

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