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

use strict; my $str = '{"event":{"type":"bill_paid","created_at":"2020-11-04T10:41:07.217-03:00","data":{"bill":{"id":90379582,"code":null,"amount":"149.9","installments":1,"status":"paid","seen_at":null,"billing_at":null,"due_at":"2020-11-04T23:59:59.000-03:00","url":"https://app.vindi.com.br/customer/bills/90379582?token=539caa15-8047-4cda-97eb-705eae360eb5","created_at":"2020-11-03T09:07:29.000-03:00","updated_at":"2020-11-04T10:40:54.000-03:00","bill_items":[{"id":108933087,"amount":"149.9","quantity":1,"pricing_range_id":null,"description":null,"pricing_schema":{"id":14598836,"short_format":"R$ 149,90","price":"149.9","minimum_price":null,"schema_type":"flat","pricing_ranges":[],"created_at":"2020-09-15T09:44:46.000-03:00"},"product":{"id":441371,"name":"Assinatura Anual FD","code":null},"product_item":{"id":17944794,"product":{"id":441371,"name":"Assinatura Anual FD","code":null}},"discount":null}],"charges":[{"id":88993071,"amount":"149.9","status":"paid","due_at":"2020-11-04T23:59:59.000-03:00","paid_at":"2020-11-03T00:00:00.000-03:00","installments":1,"attempt_count":1,"next_attempt":null,"print_url":"https://app.vindi.com.br/customer/charges/88993071?b=90379582\\u0026m=36495\\u0026t=539caa15-8047-4cda-97eb-705eae360eb5","created_at":"2020-11-03T09:07:29.000-03:00","updated_at":"2020-11-04T10:40:54.000-03:00","last_transaction":{"id":153906169,"transaction_type":"charge","status":"success","amount":"149.9","installments":1,"gateway_message":"Boleto emitido","gateway_response_code":"0","gateway_authorization":"6631","gateway_transaction_id":"11fc7cfb-8daf-4812-8fbf-8c621978d68a","gateway_response_fields":{"credit_at":"2020-11-04T00:00:00.000-03:00","due_date":"2020-11-04"},"fraud_detector_score":null,"fraud_detector_status":null,"fraud_detector_id":null,"created_at":"2020-11-03T09:07:29.000-03:00","gateway":{"id":33407,"connector":"itau"},"payment_profile":null},"payment_method":{"id":36495,"public_name":"Boleto bancário online","name":"Boleto WebService Itaú","code":"online_bank_slip","type":"PaymentMethod::OnlineBankSlip"}}],"customer":{"id":17091194,"name":"Marcio Holanda","email":"maholfer@icloud.com","code":null},"period":{"id":48284238,"billing_at":"2020-11-03T00:00:00.000-03:00","cycle":1,"start_at":"2020-11-03T00:00:00.000-03:00","end_at":"2021-11-02T23:59:59.000-03:00","duration":31535999},"subscription":{"id":13081195,"code":null,"plan":{"id":102129,"name":"Assinatura Anual FD - RECORRÊNCIA","code":null},"customer":{"id":17091194,"name":"Marcio Holanda","email":"maholfer@icloud.com","code":null}},"metadata":{},"payment_profile":null,"payment_condition":null}}}}'; my $regex = qr/"subscription":."id":.*?,"code":null,/mp; if ( $str =~ /$regex/g ) { print "Whole match is ${^MATCH} and its start/end positions can be obtained via \$-[0] and \$+[0]\n"; # print "Capture Group 1 is $1 and its start/end positions can be obtained via \$-[1] and \$+[1]\n"; # print "Capture Group 2 is $2 ... and so on\n"; } # ${^POSTMATCH} and ${^PREMATCH} are also available with the use of '/p' # Named capture groups can be called via $+{name}

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 Perl, please visit: http://perldoc.perl.org/perlre.html