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run code in 150+ php & hhvm versions
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<?php preg_match( '/^\[(.*)#(.*)\]$/', '[1#nation_regular_besoin_ponctuel]', $matches); echo $matches[1]; // 1234 echo $matches[2]; // 1234
based on P2MMH
Output for 4.3.0 - 5.0.5, 5.1.1 - 7.1.0
1nation_regular_besoin_ponctuel
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/to1SF on line 4
Process exited with code 255.