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
  • Match everything enclosed
    (?:...)
  • Capture everything enclosed
    (...)
  • 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

/
/

Test String

Code Generator

Generated Code

$re = '/./'; $str = 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam tincidunt pellentesque ex tempor porta. Ut <a href="http://molestielectus.com">molestie lectus</a> egestas lectus ornare, eu pellentesque ante posuere. Nunc volutpat non tellus tincidunt tincidunt. Aenean scelerisque sit amet felis eget vestibulum. <a title="Fusce blandit" href="https://www.fusceblandit.com">Fusce blandit</a> bibendum ligula, et viverra nunc faucibus in. Etiam hendrerit in turpis eget varius. Phasellus pellentesque porttitor laoreet. Curabitur pharetra cursus sapien, non gravida libero <a href="mailto:feugiat@fermentum.com">feugiat fermentum</a>. Nam bibendum auctor condimentum. Integer ut rhoncus odio, facilisis aliquam orci. Ut placerat nisi urna, eget ultricies enim gravida ac. Praesent sed aliquam urna. Etiam ornare purus a sapien <a href=\'//vulputatemattis.com\'>vulputate mattis</a>. Morbi tempor imperdiet risus, quis tristique nunc varius et. Praesent elementum at arcu nec malesuada. <a href="//integerporta.com" title="Integer porta">Integer porta</a> lorem non commodo eleifend. Curabitur ut risus non libero volutpat posuere.'; preg_match($re, $str, $matches, PREG_OFFSET_CAPTURE, 0); // Print the entire match result var_dump($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