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

~
~
gm

Test String

Code Generator

Language

Generated Code

$re = '~\b(?:https?://(?:www\.)?|www\.)\S+|[^A-Za-z0-9 \']~m'; $str = 'Design a Butterfly Mobile in your colors or consider this orb for your nursery. As a unique hanging nursery mobile this piece of butterfly art lasts thru decor changes as your baby enters the toddler years, teen years and then some. The iridescent butterflies are gently scattered thru out this mobile adding a bit of sparkle to your crib mobile. So many colors and sizes to view are here: www.Etsy.com/shop/ButterflyOrbs This ButterflyOrb is a Large size and has: ~96 fabric butterflies in hot pink, pink, white and a touch of iridescent. ~arrives ready to hang. ~a clear hanging line is attached and this allows for the mobile to appear to be floating in the air. It is a Large ButterflyOrb with a span of 16 inches in diameter. The orb mobile moves in gentle circles and will do so in the least of a breeze. Need help designing happy to do so~ just Contact ButterflyOrbs. Read to place your Custom Order, you may do so here: https://www.etsy.com/listing/65078448/nursery-decor-butterfly-nursery?ref=shop_home_active_2 Made to Order.'; preg_match_all($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