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

// 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#"(?siU)(<(a|link|script|div|iframe)(?:\s[^>]*[\s"']|\s)(?:(data-settings|href|data-src)(?!\s*=\s*[\\]?&quot\b))=([\"\']??))([^\4]*)(\4[^>]*>)"#).unwrap(); let string = "<iframe hcb-fetch-image-from=\"&lt;iframe src=&quot;https://player.vimeo.com/video/33234? dnt=1&quot; h=4725157e&quot; width=&quot;640&quot; height=&quot;360&quot; frameborder=&quot;0&quot; allow=&quot;autoplay; fullscreen; picture-in-picture&quot; allowfullscreen&gt;&lt;/iframe&gt;\" class=\"elementor-video-iframe\" allowfullscreen title=\"vimeo Video Player\" data-lazy-load=\"https://player.vimeo.com/video/651646452?color&amp;autopause=0&amp;loop=0&amp;muted=0&amp;title=1&amp;portrait=1&amp;byline=1#t=\"></iframe> This is an regex built on top of <a href='https://www.the-art-of-web.com/php/parse-links/' class=\"test\"> This is an regex built on top of <a href='https://www.the-art-of-web.com/php/parse-links/' class=\"test\"> This is an regex built on top of <a test=\"\"href='https://www.the-art-of-web.com/php/parse-links/' class=\"test\"> This is an regex built on top of <a test=\"\" not-matching-href='https://www.the-art-of-web.com/php/parse-links/' class=\"test\"> This is link <link rel=\"stylesheet\" href=\"http://google.com\"> This is script <script src=\"http://devowl.io\"> This is script <script data-src=\"http://devowl.io\"> This is script <script wup src=\"http://devowl.io\"> Another line <link data-src=\"{&quot;youtube_url&quot;:&quot;https:\\/\\/www.youtube.com\\/watch&quot;}\" another=\"attribute\" /> <div class=\"elementor-element elementor-element-bc17ee6 elementor-aspect-ratio-169 elementor-widget elementor-widget-video\" data-id=\"bc17ee6\" data-element_type=\"widget\" data-settings=\"{&quot;youtube_url&quot;:&quot;https:\\/\\/www.youtube.com\\/watch?v=XHOmBV4js_E&quot;,&quot;video_type&quot;:&quot;youtube&quot;,&quot;controls&quot;:&quot;yes&quot;,&quot;aspect_ratio&quot;:&quot;169&quot;}\" data-widget_type=\"video.default\"> <link hcb-fetch-image-from=\"&lt;a href=&quot;https://player.vimeo.com/video/33234?screen;picture-in-picture&quot;&gt;&lt;/a&gt;\" href=\"https://example.com/link.css\" /> <div data-markers=\"[{&quot;title&quot;:&quot;Stylish remodeled room&quot;,&quot;latitude&quot;:40,&quot;longitude&quot;:-73,&quot;content&quot;:&quot;&lt;div class=\\&quot;hp-listing hp-listing--map-block\\&quot;&gt;&lt;h5 class=\\&quot;hp-listing__title\\&quot;&gt;&lt;a href=\\&quot;https:\\/\\/example.de\\/listing\\/stylish-remodeled-room\\/\\&quot;&gt;Stylish remodeled room&lt;\\/a&gt;\\n&lt;\\/h5&gt;&lt;\\/div&gt;&quot;}]\" class=\"hp-listing__map hp-listing__map widget hp-map\" data-max-zoom=\"18\" data-component=\"map\" href=\"test\"></div> <div class=\"wpforms-container wpforms-container-full\" id=\"wpforms-1081\"><form id=\"wpforms-form-1081\" class=\"wpforms-validate wpforms-form\" data-formid=\"1081\" method=\"post\" enctype=\"multipart/form-data\" action=\"/wpforms/\" data-token=\"43285f0e3d425addb1b108bd61d3dee9\"><noscript class=\"wpforms-error-noscript\">Please enable JavaScript in your browser to complete this form.</noscript><div class=\"wpforms-field-container\"><div id=\"wpforms-1081-field_0-container\" class=\"wpforms-field wpforms-field-name\" data-field-id=\"0\"><label class=\"wpforms-field-label\" for=\"wpforms-1081-field_0\">Name <span class=\"wpforms-required-label\">*</span></label><div class=\"wpforms-field-row wpforms-field-medium\"><div class=\"wpforms-field-row-block wpforms-first wpforms-one-half\"><input type=\"text\" id=\"wpforms-1081-field_0\" class=\"wpforms-field-name-first wpforms-field-required\" name=\"wpforms[fields][0][first]\" required><label for=\"wpforms-1081-field_0\" class=\"wpforms-field-sublabel after \">First</label></div><div class=\"wpforms-field-row-block wpforms-one-half\"><input type=\"text\" id=\"wpforms-1081-field_0-last\" class=\"wpforms-field-name-last wpforms-field-required\" name=\"wpforms[fields][0][last]\" required><label for=\"wpforms-1081-field_0-last\" class=\"wpforms-field-sublabel after \">Last</label></div></div></div><div id=\"wpforms-1081-field_1-container\" class=\"wpforms-field wpforms-field-email\" data-field-id=\"1\"><label class=\"wpforms-field-label\" for=\"wpforms-1081-field_1\">Email <span class=\"wpforms-required-label\">*</span></label><input type=\"email\" id=\"wpforms-1081-field_1\" class=\"wpforms-field-medium wpforms-field-required\" name=\"wpforms[fields][1]\" required></div><div id=\"wpforms-1081-field_2-container\" class=\"wpforms-field wpforms-field-textarea\" data-field-id=\"2\"><label class=\"wpforms-field-label\" for=\"wpforms-1081-field_2\">Comment or Message <span class=\"wpforms-required-label\">*</span></label><textarea id=\"wpforms-1081-field_2\" class=\"wpforms-field-medium wpforms-field-required\" name=\"wpforms[fields][2]\" required></textarea></div></div><div class=\"wpforms-submit-container\" ><input type=\"hidden\" name=\"wpforms[id]\" value=\"1081\"><input type=\"hidden\" name=\"wpforms[author]\" value=\"1\"><input type=\"hidden\" name=\"wpforms[post_id]\" value=\"1082\"><button type=\"submit\" name=\"wpforms[submit]\" class=\"wpforms-submit \" id=\"wpforms-submit-1081\" value=\"wpforms-submit\" aria-live=\"assertive\" data-alt-text=\"Sending...\" data-submit-text=\"Submit\">Submit</button></div></form></div> <!-- .wpforms-container --> </div><!-- .entry-content --> <footer class=\"entry-meta\"> <span class=\"edit-link\"><a class=\"post-edit-link\" href=\"http://gitlab-ci-runner-3.owlsrv.de:10000/wp-admin/post.php?post=1082&#038;action=edit\">Edit</a></span> </footer><!-- .entry-meta --> </article><!-- #post-1082 -->"; // 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/