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

/
/
gs

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#"(?s)(<div class="[^"]*?\menu\b[^"]*?">.*?<\/div>)"#).unwrap(); let string = "<div class=\"menu\"> <div class=\"innermenu pagewidth\"> <div class=\"leftside\"></div> <ul> <li class=\"parent\" > <h3> <a href=\"#\" title=\"Menu\" id=\"headlink4\" class=\"spanhover mainlevel\"> <span>Menu</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> <div class=\"submenu level1\"> <ul class=\"level1\"> <li class=\"parent\" id=\"hcategory_1\"> <h3> <a href=\"pl/c/Szyby-nowe/1.html\" title=\"Szyby nowe\" id=\"headercategory1\" class=\"spanhover\"> <span>Szyby nowe</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> <div class=\"submenu level2\"> <ul class=\"level2\"> <li class=\"\" id=\"hcategory_7\"> <h3> <a href=\"pl/c/ACURA/7.html\" title=\"ACURA\" id=\"headercategory7\" class=\"spanhover\"> <span>ACURA</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_8\"> <h3> <a href=\"pl/c/AUDI/8.html\" title=\"AUDI\" id=\"headercategory8\" class=\"spanhover\"> <span>AUDI</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_9\"> <h3> <a href=\"pl/c/BMW/9.html\" title=\"BMW\" id=\"headercategory9\" class=\"spanhover\"> <span>BMW</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_40\"> <h3> <a href=\"pl/c/BUICK/40.html\" title=\"BUICK\" id=\"headercategory40\" class=\"spanhover\"> <span>BUICK</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_10\"> <h3> <a href=\"pl/c/CADILLAC/10.html\" title=\"CADILLAC\" id=\"headercategory10\" class=\"spanhover\"> <span>CADILLAC</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_11\"> <h3> <a href=\"pl/c/CHEVROLET/11.html\" title=\"CHEVROLET\" id=\"headercategory11\" class=\"spanhover\"> <span>CHEVROLET</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_14\"> <h3> <a href=\"pl/c/CHRYSLER/14.html\" title=\"CHRYSLER\" id=\"headercategory14\" class=\"spanhover\"> <span>CHRYSLER</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_46\"> <h3> <a href=\"pl/c/CITROEN/46.html\" title=\"CITROEN\" id=\"headercategory46\" class=\"spanhover\"> <span>CITROEN</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_15\"> <h3> <a href=\"pl/c/DODGE/15.html\" title=\"DODGE\" id=\"headercategory15\" class=\"spanhover\"> <span>DODGE</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_44\"> <h3> <a href=\"pl/c/FIAT/44.html\" title=\"FIAT\" id=\"headercategory44\" class=\"spanhover\"> <span>FIAT</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_16\"> <h3> <a href=\"pl/c/FORD/16.html\" title=\"FORD\" id=\"headercategory16\" class=\"spanhover\"> <span>FORD</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_12\"> <h3> <a href=\"pl/c/GMC/12.html\" title=\"GMC\" id=\"headercategory12\" class=\"spanhover\"> <span>GMC</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_17\"> <h3> <a href=\"pl/c/HONDA/17.html\" title=\"HONDA\" id=\"headercategory17\" class=\"spanhover\"> <span>HONDA</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_18\"> <h3> <a href=\"pl/c/HUMMER/18.html\" title=\"HUMMER\" id=\"headercategory18\" class=\"spanhover\"> <span>HUMMER</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_19\"> <h3> <a href=\"pl/c/HYUNDAI/19.html\" title=\"HYUNDAI\" id=\"headercategory19\" class=\"spanhover\"> <span>HYUNDAI</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_20\"> <h3> <a href=\"pl/c/INFINITI/20.html\" title=\"INFINITI\" id=\"headercategory20\" class=\"spanhover\"> <span>INFINITI</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_13\"> <h3> <a href=\"pl/c/ISUZU/13.html\" title=\"ISUZU\" id=\"headercategory13\" class=\"spanhover\"> <span>ISUZU</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_21\"> <h3> <a href=\"pl/c/JAGUAR/21.html\" title=\"JAGUAR\" id=\"headercategory21\" class=\"spanhover\"> <span>JAGUAR</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_22\"> <h3> <a href=\"pl/c/JEEP/22.html\" title=\"JEEP\" id=\"headercategory22\" class=\"spanhover\"> <span>JEEP</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_23\"> <h3> <a href=\"pl/c/KIA/23.html\" title=\"KIA\" id=\"headercategory23\" class=\"spanhover\"> <span>KIA</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_45\"> <h3> <a href=\"pl/c/LANCIA/45.html\" title=\"LANCIA\" id=\"headercategory45\" class=\"spanhover\"> <span>LANCIA</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_24\"> <h3> <a href=\"pl/c/LAND-ROVER/24.html\" title=\"LAND ROVER\" id=\"headercategory24\" class=\"spanhover\"> <span>LAND ROVER</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_25\"> <h3> <a href=\"pl/c/LEXUS/25.html\" title=\"LEXUS\" id=\"headercategory25\" class=\"spanhover\"> <span>LEXUS</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_38\"> <h3> <a href=\"pl/c/LINCOLN/38.html\" title=\"LINCOLN\" id=\"headercategory38\" class=\"spanhover\"> <span>LINCOLN</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_26\"> <h3> <a href=\"pl/c/MAZDA/26.html\" title=\"MAZDA\" id=\"headercategory26\" class=\"spanhover\"> <span>MAZDA</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_27\"> <h3> <a href=\"pl/c/MERCEDES-BENZ/27.html\" title=\"MERCEDES BENZ\" id=\"headercategory27\" class=\"spanhover\"> <span>MERCEDES BENZ</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_48\"> <h3> <a href=\"pl/c/MERCURY/48.html\" title=\"MERCURY\" id=\"headercategory48\" class=\"spanhover\"> <span>MERCURY</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_28\"> <h3> <a href=\"pl/c/MITSUBISHI/28.html\" title=\"MITSUBISHI\" id=\"headercategory28\" class=\"spanhover\"> <span>MITSUBISHI</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_29\"> <h3> <a href=\"pl/c/NISSAN/29.html\" title=\"NISSAN\" id=\"headercategory29\" class=\"spanhover\"> <span>NISSAN</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_41\"> <h3> <a href=\"pl/c/OLDSMOBILE/41.html\" title=\"OLDSMOBILE\" id=\"headercategory41\" class=\"spanhover\"> <span>OLDSMOBILE</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_30\"> <h3> <a href=\"pl/c/OPEL/30.html\" title=\"OPEL\" id=\"headercategory30\" class=\"spanhover\"> <span>OPEL</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_47\"> <h3> <a href=\"pl/c/PEUGEOT/47.html\" title=\"PEUGEOT\" id=\"headercategory47\" class=\"spanhover\"> <span>PEUGEOT</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_43\"> <h3> <a href=\"pl/c/PONTIAC/43.html\" title=\"PONTIAC\" id=\"headercategory43\" class=\"spanhover\"> <span>PONTIAC</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_31\"> <h3> <a href=\"pl/c/PORSCHE/31.html\" title=\"PORSCHE\" id=\"headercategory31\" class=\"spanhover\"> <span>PORSCHE</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_32\"> <h3> <a href=\"pl/c/RANGE-ROVER/32.html\" title=\"RANGE ROVER\" id=\"headercategory32\" class=\"spanhover\"> <span>RANGE ROVER</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_33\"> <h3> <a href=\"pl/c/SAAB/33.html\" title=\"SAAB\" id=\"headercategory33\" class=\"spanhover\"> <span>SAAB</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_42\"> <h3> <a href=\"pl/c/SATURN/42.html\" title=\"SATURN\" id=\"headercategory42\" class=\"spanhover\"> <span>SATURN</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_34\"> <h3> <a href=\"pl/c/SUBARU/34.html\" title=\"SUBARU\" id=\"headercategory34\" class=\"spanhover\"> <span>SUBARU</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_35\"> <h3> <a href=\"pl/c/SUZUKI/35.html\" title=\"SUZUKI\" id=\"headercategory35\" class=\"spanhover\"> <span>SUZUKI</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_36\"> <h3> <a href=\"pl/c/TOYOTA/36.html\" title=\"TOYOTA\" id=\"headercategory36\" class=\"spanhover\"> <span>TOYOTA</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_37\"> <h3> <a href=\"pl/c/VOLKSWAGEN/37.html\" title=\"VOLKSWAGEN\" id=\"headercategory37\" class=\"spanhover\"> <span>VOLKSWAGEN</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_39\"> <h3> <a href=\"pl/c/VOLVO/39.html\" title=\"VOLVO\" id=\"headercategory39\" class=\"spanhover\"> <span>VOLVO</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> </ul> </div> </li> <li class=\"\" id=\"hcategory_2\"> <h3> <a href=\"pl/c/Szyby-uzywane/2.html\" title=\"Szyby używane\" id=\"headercategory2\" class=\"spanhover\"> <span>Szyby używane</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_3\"> <h3> <a href=\"pl/c/Czesci-samochodowe/3.html\" title=\"Części samochodowe\" id=\"headercategory3\" class=\"spanhover\"> <span>Części samochodowe</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_5\"> <h3> <a href=\"pl/c/Zabezpieczenia-do-motocykli-i-rowerow/5.html\" title=\"Zabezpieczenia do motocykli i rowerów\" id=\"headercategory5\" class=\"spanhover\"> <span>Zabezpieczenia do motocykli i rowerów</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" id=\"hcategory_4\"> <h3> <a href=\"pl/c/Samochody/4.html\" title=\"Samochody\" id=\"headercategory4\" class=\"spanhover\"> <span>Samochody</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> </ul> </div> </li> <li class=\"\" > <h3> <a href=\"pl/i/Regulamin/2.html\" title=\"Regulamin\" id=\"headlink1\" class=\"spanhover mainlevel\"> <span>Regulamin</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" > <h3> <a href=\"pl/contact.html\" title=\"Formularz kontaktowy\" id=\"headlink2\" class=\"spanhover mainlevel\"> <span>Formularz kontaktowy</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> <li class=\"\" > <h3> <a href=\"pl/i/Polityka-prywatnosci/3.html\" title=\"Polityka prywatności\" id=\"headlink3\" class=\"spanhover mainlevel\"> <span>Polityka prywatności</span> <img src=\"public/images/1px.gif\" alt=\"\" class=\"px1\" /> </a> </h3> </li> </ul> <div class=\"rightside\"></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/