Regular Expressions 101

Group 1(http://|https://|ftp://|mailto:|www\.){1}

{1}repeats the group contents below exactly 1 time:

1st Alternativehttp://

http://the literal text http:// (case sensitive)

2nd Alternativehttps://

https://the literal text https:// (case sensitive)

3rd Alternativeftp://

ftp://the literal text ftp:// (case sensitive)

4th Alternativemailto:

mailto:the literal text mailto: (case sensitive)

5th Alternativewww\.

wwwthe literal text www (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Negative Lookahead(?![^>]*<)

Negated Character Class[^>]*

*matches any number of characters outside the set below:

>the literal > (62₁₀ / 76₈ / 3E₁₆)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

Negative Lookahead(?![^"]*")

Negated Character Class[^"]*

*matches any number of characters outside the set below:

"the literal " (34₁₀ / 42₈ / 22₁₆)

Negated Character Class[^^\\\"\n\s\}\{\|\`<>~]*

*matches any number of characters outside the set below:

^the literal ^ (94₁₀ / 136₈ / 5E₁₆)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

\"the literal " (34₁₀ / 42₈ / 22₁₆)

\na line-feed (newline) character (ASCII 10)

\sany whitespace character

\}the literal } (125₁₀ / 175₈ / 7D₁₆)

\{the literal { (123₁₀ / 173₈ / 7B₁₆)

\|the literal | (124₁₀ / 174₈ / 7C₁₆)

\`the literal ` (96₁₀ / 140₈ / 60₁₆)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

~the literal ~ (126₁₀ / 176₈ / 7E₁₆)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

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Search reference

Regular Expression

(http://|https://|ftp://|mailto:|www\.){1}(?![^>]*<)(?![^"]*")[^^\\\"\n\s\}\{\|\`<>~]*

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