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

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#"<span class=\"_c1 ei_card_subtitle _c1\">.*?<br\s?\/>\s([\dX]+).*?<\/span>"#).unwrap(); let string = "<body class=\"default-theme des-mat\" style=\"background: rgb(255, 255, 255);\"><div id=\"prpd\"></div><div class=\"\" id=\"mngb\"><div id=\"gb\" class=\"gb_T\"><div class=\"gb_nb gb_Lg gb_R gb_Kg gb_Og gb_T\" style=\"min-width: 241px;\"><div class=\"gb_oe gb_R gb_Lg gb_Bg\"><div class=\"gb_Q gb_R gb_S gb_Lg\"><span class=\"_c1 ei_card_subtitle _c1\">What about a name with an 8 in it here<br /> 713286XXX971 - 12021980</span>/div><div class=\"gb_Q gb_R\"><a class=\"gb_P\" data-pid=\"23\" href=\"https://mail.google.com/mail/?authuser=0\">Gmail</a></div><div class=\"gb_Q gb_R\"><a class=\"gb_P\" data-pid=\"2\" href=\"https://www.google.com/imghp?hl=en&amp;authuser=0\">Images</a></div></div><div class=\"gb_Ec gb_Lg gb_R\" style=\"min-width: 120px;\"><div class=\"gb_fa\" id=\"gbsfw\" style=\"background-color:#eee;min-width:376px\"><iframe ng-non-bindable=\"\" frameborder=\"0\" hspace=\"0\" marginheight=\"0\" marginwidth=\"0\" scrolling=\"no\" style=\"width: 376px; height: 380px;\" tabindex=\"0\" vspace=\"0\" width=\"100%\" class=\"gb_9b\" allowtransparency=\"true\" aria-hidden=\"true\" id=\"I0_1523641321551\" name=\"I0_1523641321551\" src=\"https://notifications.google.com/u/0/widget?sourceid=243&amp;hl=en&amp;origin=https%3A%2F%2Fwww.google.com&amp;uc=1&amp;usegapi=1&amp;jsh=m%3B%2F_%2Fscs%2Fabc-static%2F_%2Fjs%2Fk%3Dgapi.gapi.en.DgOlXVbWcXc.O%2Fm%3D__features__%2Frt%3Dj%2Fd%3D1%2Frs%3DAHpOoo-riybzrJ8O_UpInxWO1d1OWu1FtA#pid=243&amp;_methods=onError%2ConInfo%2ChideNotificationWidget%2CpostSharedMessage%2Creauth%2CsetNotificationWidgetHeight%2CsetNotificationWidgetSize%2CswitchTo%2CnavigateTo%2CsetNotificationText%2CsetNotificationAnimation%2CgetNotificationText%2CvalidateUser%2C_ready&amp;id=I0_1523641321551&amp;_gfid=I0_1523641321551&amp;parent=https%3A%2F%2Fwww.google.com&amp;pfname=&amp;rpctoken=13573360\"></iframe></div><div class=\"gb_da gb_9c gb_R\" id=\"gbwa\"><div class=\"gb_Qc\"><a class=\"gb_b gb_hc\" href=\"https://www.google.com/intl/en/options/\" title=\"Google apps\" aria-expanded=\"false\" role=\"button\" tabindex=\"0\"></a><div class=\"gb_wb\"></div></body>"; // 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/