Regular Expressions 101

Pro

__the literal text __

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Group 1(['"])

Character Class['"]

'the literal ' (39₁₀ / 47₈ / 27₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

Group 2((?:\\\1|(?!\1).)*)

Non-Capturing Group(?:\\\1|(?!\1).)*

*repeats the group contents below any number of times:

1st Alternative\\\1

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

\1the text saved by group 1

2nd Alternative(?!\1).

Negative Lookahead(?!\1)

\1the text saved by group 1

.any character

\1the text saved by group 1

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

Global pattern flags

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

s modifier: single line. Allows a dot to match line terminators

Detailed match information will be displayed here automatically.

25 tokens

__\((['"])((?:\\\1|(?!\1).)*)\1\)

New


echo __('simple quoted: I don\'t "see" what is wrong');
echo __("double quoted: I don't \"see\" what is wrong");