<?php
$pattern = <<<REGEXP
/(?(R) # in case of recursion match parentheses
\(((?>[^\s()]+)|(?R))*\)
| # else match a link with title
^\((((?>[^\s()]+)|(?R))*)(\s+"(.*?)")?\)
)/x
REGEXP;
Parse error: syntax error, unexpected end of file, expecting variable (T_VARIABLE) or heredoc end (T_END_HEREDOC) or ${ (T_DOLLAR_OPEN_CURLY_BRACES) or {$ (T_CURLY_OPEN) in /in/qXblL on line 11
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected $end, expecting T_VARIABLE or T_END_HEREDOC or T_DOLLAR_OPEN_CURLY_BRACES or T_CURLY_OPEN in /in/qXblL on line 11
Process exited with code 255.