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

/
/
g

Test String

Code Generator

Language

Generated Code

$re = '/$-^/'; $str = 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam sit amet neque vitae mi lobortis bibendum luctus at orci. Maecenas sit amet felis ultrices, imperdiet nibh et, laoreet nisl. Etiam nec ligula ac quam cursus rhoncus. Duis ac purus id massa malesuada dapibus. Quisque tempor sapien sit amet blandit interdum. Sed sed libero non enim posuere pretium. Cras in nisl sed magna vestibulum ultrices. Sed eget neque sodales, porttitor magna nec, facilisis dolor. Donec venenatis tortor nec leo viverra, non fermentum nulla pulvinar. Pellentesque a nulla laoreet, euismod lectus vel, porta erat. Fusce at justo in massa blandit lacinia nec maximus nulla. Nam vulputate risus et sem facilisis lobortis. Integer vel risus et enim tempor iaculis. Pellentesque at nibh in ipsum sagittis congue. Nam ullamcorper nibh sit amet felis bibendum, congue tincidunt nibh cursus. Sed eget massa et erat pulvinar aliquet. Proin congue enim eget turpis blandit, quis tempus nulla venenatis. Proin iaculis lorem eget elit efficitur, accumsan ornare lacus commodo. Vivamus mollis orci et erat dignissim rhoncus. Cras at arcu ac ligula interdum dictum non at nisl.'; preg_match_all($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