3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo preg_quote('(?:"?([^"]*)"?\s)?(?:<?(.+@[^>]+)>?)'); preg_match_all('(?:"?([^"]*)"?\s)?(?:<?(.+@[^>]+)>?)', 'Eric Peterson <foo@example.com>', $matches); print_r($matches);
Output for 5.2.0 - 7.1.0
\(\?\:"\?\(\[\^"\]\*\)"\?\\s\)\?\(\?\:\<\?\(\.\+@\[\^\>\]\+\)\>\?\) Warning: preg_match_all(): Unknown modifier '?' in /in/j4K2l on line 5
Output for 4.3.11 - 5.1.6
\(\?\:"\?\(\[\^"\]\*\)"\?\\s\)\?\(\?\:\<\?\(\.\+@\[\^\>\]\+\)\>\?\) Warning: preg_match_all(): Unknown modifier '?' in /in/j4K2l on line 5 Array ( )
Output for 4.3.0 - 4.3.10
\(\?\:"\?\(\[\^"\]\*\)"\?\\s\)\?\(\?\:\<\?\(\.\+@\[\^\>\]\+\)\>\?\) Warning: Unknown modifier '?' in /in/j4K2l on line 5 Array ( )