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

package main import ( "regexp" "fmt" ) func main() { var re = regexp.MustCompile(`[[Video:(http)\:\/\/[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(\/\S*)?4`) var str = ` <p class="arttxt_tit">ARTBLOG YAZARIMIZ OLUN! ekavArtblog</p> <p class="arttxt"><i>22.11.2011</i></p> <p class="arttxt"> <p style="text-align: center;"> <br /> <img alt="" src="http://www.ekavart.tv/handlers/Image.ashx?id=984" style="width: 364px; height: 272px;" /><br /> <br /> <br /> Sanatla ilgili her t&uuml;rl&uuml; yazınısı bizle paylaşın, yayınlayalım.<br /> <br /> Yazılarınızı, iletişim bilgilerinizle beraber info@ekavart.tv adresine en az 5 g&ouml;rselle g&ouml;nderebilirsiniz.</p> [[Video:http://data.ekavart.tv/ekav/temp/mp4/2016/7/13/3061.mp4 </p> ` for i, match := range re.FindAllString(str, -1) { fmt.Println(match, "found at index", i) } }

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 Golang, please visit: https://golang.org/pkg/regexp/