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

/
/
sig

Test String

Code Generator

Language

Generated Code

// include the latest version of the regex crate in your Cargo.toml extern crate regex; use regex::Regex; fn main() { let regex = Regex::new(r"(?si)<div[^>]*>\d{6}<\/div>").unwrap(); let string = "<div dir=\"ltr\"><br><br><div class=\"gmail_quote\"><div dir=\"ltr\" class=\"gmail_attr\"><br></div><u></u> <div> <center id=\"m_-2051398760120817894wrapper\"> <table id=\"m_-2051398760120817894main\" width=\"100%\"> <tbody><tr id=\"m_-2051398760120817894logo\"> <td> <table width=\"100%\"> <tbody><tr> <td> <img src=\"test.com/logo.png\" width=\"140px\" alt=\"xxxxx Logo\" style=\"padding:0 10px\"> </td> </tr> </tbody></table> </td> </tr> <tr> <td height=\"18px\"></td> </tr> <tr id=\"m_-2051398760120817894header\"> <td> <table width=\"100%\"> <tbody><tr> <td height=\"64px\" style=\"background-color:#10069f;color:#fff;padding-left:24px;font-weight:700\">Reset your password</td> </tr> </tbody></table> </td> </tr> <tr id=\"m_-2051398760120817894content\"> <td> <table width=\"100%\"> <tbody><tr> <td style=\"background-color:#f6f5ff;padding:24px 24px 16px 24px\"> <p style=\"margin-top:0\">The following is the verification code required to complete your password reset.</p> <p style=\"margin-bottom:24px\">Enter the following verification code on the screen during the registration, and proceed to the next step.</p> <div style=\"display:block;text-align:center;margin-bottom:8px;background-color:#fff;height:92px;font-weight:600;font-size:36px;line-height:92px\">191418</div> <span style=\"display:block;font-size:12px;color:#5d5d5d\">*The verification code is valid only for 24 hours.</span> </td> </tr> </tbody></table> </td> </tr> <tr> <td height=\"24px\"></td> </tr> <tr id=\"m_-2051398760120817894footer\"> <td> <table width=\"100%\"> <tbody><tr> <td style=\"background-color:#6d7777;padding:16px 24px;font-size:12px;color:#fff\"> <table width=\"100%\"> <tbody><tr> <td id=\"m_-2051398760120817894footer-left\"> <span style=\"display:block\">amnimo Inc.</span> <span style=\"display:block\">0-3-30 usaa-fso, xxxxxxxx-shi, Tokyo, 180-8750, Japan</span> <span style=\"display:block\">Phone: +81-422-52-6779</span> <span id=\"m_-2051398760120817894copyright-mb\" style=\"margin-top:16px\">© 2020 <div dir=\"ltr\"><br><br><div class=\"gmail_quote\"><div dir=\"ltr\" class=\"gmail_attr\"><br></div><u></u> <div> <center id=\"m_-2051398760120817894wrapper\"> <table id=\"m_-2051398760120817894main\" width=\"100%\"> <tbody><tr id=\"m_-2051398760120817894logo\"> <td> <table width=\"100%\"> <tbody><tr> <td> <img src=\"https://test.com/logo.png\" width=\"140px\" alt=\"Amnimo Logo\" style=\"padding:0 10px\"> </td> </tr> </tbody></table> </td> </tr> <tr> <td height=\"18px\"></td> </tr> <tr id=\"m_-2051398760120817894header\"> <td> <table width=\"100%\"> <tbody><tr> <td height=\"64px\" style=\"background-color:#10069f;color:#fff;padding-left:24px;font-weight:700\">Reset your password</td> </tr> </tbody></table> </td> </tr> <tr id=\"m_-2051398760120817894content\"> <td> <table width=\"100%\"> <tbody><tr> <td style=\"background-color:#f6f5ff;padding:24px 24px 16px 24px\"> <p style=\"margin-top:0\">The following is the verification code required to complete your password reset.</p> <p style=\"margin-bottom:24px\">Enter the following verification code on the screen during the registration, and proceed to the next step.</p> <div style=\"display:block;text-align:center;margin-bottom:8px;background-color:#fff;height:92px;font-weight:600;font-size:36px;line-height:92px\">191418</div> <span style=\"display:block;font-size:12px;color:#5d5d5d\">*The verification code is valid only for 24 hours.</span> </td> </tr> </tbody></table> </td> </tr> <tr> <td height=\"24px\"></td> </tr> <tr id=\"m_-2051398760120817894footer\"> <td> <table width=\"100%\"> <tbody><tr> <td style=\"background-color:#6d7777;padding:16px 24px;font-size:12px;color:#fff\"> <table width=\"100%\"> <tbody><tr> <td id=\"m_-2051398760120817894footer-left\"> <span style=\"display:block\">test Inc.</span> <span style=\"display:block\">2-9-32 ssdsa-sss, puakano-shi, Tokyo, 000-8000, Japan</span> <span style=\"display:block\">Phone: +81-000-00-652</span> <span id=\"m_-2051398760120817894copyright-mb\" style=\"margin-top:16px\">© 2020 amnimo Inc.</span> </td> <td id=\"m_-2051398760120817894footer-right\"> <span style=\"display:block\">© 2020 amnimo Inc.</span> </td> </tr> </tbody></table> </td> </tr> </tbody></table> </td> </tr> </tbody></table> </center> </div> </div></div> Inc.</span> </td> <td id=\"m_-2051398760120817894footer-right\"> <span style=\"display:block\">© 2020 test Inc.</span> </td> </tr> </tbody></table> </td> </tr> </tbody></table> </td> </tr> </tbody></table> </center> </div> </div></div>"; // result will be an iterator over tuples containing the start and end indices for each match in the string let result = regex.captures_iter(string); for mat in result { println!("{:?}", mat); } }

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 Rust, please visit: https://docs.rs/regex/latest/regex/