Regular Expressions 101

\?the literal ? (63₁₀ / 77₈ / 3F₁₆)

Group 1(utf8=[^\s&]*)

utf8=the literal text utf8= (case sensitive)

Negated Character Class[^\s&]*

*matches any number of characters outside the set below:

\sany whitespace character

&the literal & (38₁₀ / 46₈ / 26₁₆)

\&the literal & (38₁₀ / 46₈ / 26₁₆)

Group 2(q=[^\s&]*)

q=the literal text q= (case sensitive)

Negated Character Class[^\s&]*

*matches any number of characters outside the set below:

\sany whitespace character

&the literal & (38₁₀ / 46₈ / 26₁₆)

\&the literal & (38₁₀ / 46₈ / 26₁₆)

Group 3([^\s&=]*=[^\s&]*)

Negated Character Class[^\s&=]*

*matches any number of characters outside the set below:

\sany whitespace character

&the literal & (38₁₀ / 46₈ / 26₁₆)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

Negated Character Class[^\s&]*

*matches any number of characters outside the set below:

\sany whitespace character

&the literal & (38₁₀ / 46₈ / 26₁₆)

\&the literal & (38₁₀ / 46₈ / 26₁₆)

Group 4([^\s&=]*=[^\s&]*)

Negated Character Class[^\s&=]*

*matches any number of characters outside the set below:

\sany whitespace character

&the literal & (38₁₀ / 46₈ / 26₁₆)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

Negated Character Class[^\s&]*

*matches any number of characters outside the set below:

\sany whitespace character

&the literal & (38₁₀ / 46₈ / 26₁₆)

$end of line

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

\?(utf8=[^\s&]*)\&(q=[^\s&]*)\&([^\s&=]*=[^\s&]*)\&([^\s&=]*=[^\s&]*)$

New

https://github.com/search?utf8=✓&q=python&type=Repositories&ref=searchresults
https://github.com/search?o=desc&q=python&ref=searchresults&s=updated&type=Repositories&utf8=✓



https://github.com/search?utf8=✓&q=python&type=Repositories&ref=searchresults
https://github.com/search?o=desc&q=python&ref=searchresults&s=stars&type=Repositories&utf8=✓

Substitution

?o=desc&\2&\4&s=updated&\3&\1