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

$re = '/(<(a|link|script|div|iframe)(?:\s[^>]*[\s"\']|\s)(?:(data-settings|href|data-src)(?!\s*=\s*[\\\\]?&quot\b))=([\"\']??))([^\4]*)(\4[^>]*>)/siU'; $str = '<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 -->'; preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0); // Print the entire match result var_dump($matches);

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 PHP, please visit: http://php.net/manual/en/ref.pcre.php