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

/
/
gm

Test String

Code Generator

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#"(?m)<form.+action="(.*?)".*>\n.*?<input.*?value="(.*?)".*>\n.*?<input.*?value="(.*?)".*>\n.*?<input.*?value="(.*?)"|<input id="(.*?)"|<input name="(.*?)""#).unwrap(); let string = "<form accept-charset=\"UTF-8\" action=\"https://appname.infusionsoft.com/app/form/process/6488f3cca2ac451a9d4f416c48f4c3bc\" class=\"infusion-form\" id=\"inf_form_6488f3cca2ac451a9d4f416c48f4c3bc\" method=\"POST\"> <input name=\"inf_form_xid\" type=\"hidden\" value=\"6488f3cca2ac451a9d4f416c48f4c3bc\" /> <input name=\"inf_form_name\" type=\"hidden\" value=\"Regex Text Webform\" /> <input name=\"infusionsoft_version\" type=\"hidden\" value=\"1.70.0.369835\" /> <div class=\"infusion-field\"> <label for=\"inf_field_FirstName\">Vorname</label> <input id=\"inf_field_FirstName\" name=\"inf_field_FirstName\" placeholder=\"Vorname\" type=\"text\" /> </div> <div class=\"infusion-field\"> <label for=\"inf_field_Email\">Email *</label> <input id=\"inf_field_Email\" name=\"inf_field_Email\" placeholder=\"Email *\" type=\"text\" /> </div> <div class=\"infusion-field\"> <label for=\"inf_field_Phone1\">Phone 1</label> <input id=\"inf_field_Phone1\" name=\"inf_field_Phone1\" placeholder=\"Phone 1\" type=\"text\" /> </div> <div class=\"infusion-field\"> <label for=\"inf_custom_WebinarTitel0\">Webinar Titel</label> <input id=\"inf_custom_WebinarTitel0\" name=\"inf_custom_WebinarTitel0\" placeholder=\"Webinar Titel\" type=\"text\" /> </div> <div class=\"infusion-field\"> <label for=\"inf_custom_WebinarTeilnahmelink0\">Webinar Teilnahmelink *</label> <input id=\"inf_custom_WebinarTeilnahmelink0\" name=\"inf_custom_WebinarTeilnahmelink0\" placeholder=\"Webinar Teilnahmelink *\" type=\"text\" /> </div> <input name=\"inf_field_LeadSourceId\" type=\"hidden\" value=\"null\" /> <input name=\"inf_custom_Quelle\" type=\"hidden\" value=\"null\" /> <div> <div>&nbsp;</div> </div> <div class=\"infusion-submit\"> <button class=\"infusion-recaptcha\" id=\"recaptcha_6488f3cca2ac451a9d4f416c48f4c3bc\" type=\"submit\">Los gehts!</button> </div> </form> <script type=\"text/javascript\" src=\"https://appname.infusionsoft.app/app/webTracking/getTrackingCode\"></script> <script type=\"text/javascript\" src=\"https://appname.infusionsoft.com/resources/external/recaptcha/production/recaptcha.js?b=1.70.0.369835-hf-202106081103\"></script> <script src=\"https://www.google.com/recaptcha/api.js?onload=onloadInfusionRecaptchaCallback&render=explicit\" async=\"async\" defer=\"defer\"></script> <script type=\"text/javascript\" src=\"https://appname.infusionsoft.com/app/timezone/timezoneInputJs?xid=6488f3cca2ac451a9d4f416c48f4c3bc\"></script> <script type=\"text/javascript\" src=\"https://appname.infusionsoft.com/js/jquery/jquery-3.3.1.js\"></script> <script type=\"text/javascript\" src=\"https://appname.infusionsoft.app/app/webform/overwriteRefererJs\"></script>"; // 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/