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run code in 150+ php & hhvm versions
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<?php preg_match('/(\<!--\s*.*?((--\>)|$))/imsxn', '<!-- com1 <!-- com 2 <!-- com2.1 --> --> <!-- com3 --> -->', $matches)
Output for 5.4.0 - 5.5.7
Parse error: syntax error, unexpected end of file in /in/rsQED on line 2
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected $end in /in/rsQED on line 2
Process exited with code 255.