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
Processing...

Test String

Code Generator

Language

Generated Code

const regex = /(')([a-z])/gm; // Alternative syntax using RegExp constructor // const regex = new RegExp('(\')([a-z])', 'gm') const str = ` 'full_name' => 'نام و نام خانوادگی', 'mobile' => 'شماره تلفن همراه', 'email' => 'ایمیل', 'password' => 'رمز عبور', 'first_name' => 'نام', 'last_name' => 'نام خانوادگی', 'father_name' => 'نام پدر', 'national_code' => 'کد ملی', 'bs_number' => 'شماره شناسنامه', 'bs_prefix_alpha' => 'حروف سریال شناسنامه', 'bs_prefix_num' => 'اعداد سریال شناسنامه', 'bs_serial' => 'شماره سریال شناسنامه', 'birthday' => 'تاریخ تولد', 'issue_place' => 'محل صدور', 'gender' => 'جنسیت', 'marital_status' => 'وضعیت تاهل', 'postal_code' => 'کد پستی', 'home_phone' => 'تلفن منزل', 'fax' => 'فکس', 'province' => 'استان', 'city' => 'شهر', 'address' => 'آدرس', 'contact_type' => 'نوع آدرس', 'country' => 'کشور', 'company_name' => 'نام محل کار', 'phone' => 'شماره ثابت', 'account_type' => 'نوع حساب', 'bank' => 'نام بانک', 'branch_name' => 'نام شعبه', 'branch_code' => 'کد شعبه', 'branch_city' => 'شهر محل شعبه', 'account_number' => 'شماره حساب', 'owner_name' => 'نام دارنده حساب', 'iban' => 'شماره شبا', 'document_type' => 'نوع مدرک', 'file_name' => 'فایل', 'trading_code' => 'کد سهامداری', 'sejam_code' => 'کد سجام', 'old_bs' => 'گزینه شناسنامه نو', 'data' => 'داده ها', 'user_type' => 'نوع کاربر',`; // Reset `lastIndex` if this regex is defined globally // regex.lastIndex = 0; let m; while ((m = regex.exec(str)) !== null) { // This is necessary to avoid infinite loops with zero-width matches if (m.index === regex.lastIndex) { regex.lastIndex++; } // The result can be accessed through the `m`-variable. m.forEach((match, groupIndex) => { console.log(`Found match, group ${groupIndex}: ${match}`); }); }

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 JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions