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run code in 150+ php & hhvm versions
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<?php var_dump(str_replace(' ', '-', preg_replace("([^\w\s\d\-_~,;:\[\]\(\].]|[\.]{2,})", '', 'my awesome title'))); //var_dump(sys_get_temp_dir());
based on nHiTY
Output for 4.3.0 - 5.0.5, 5.1.1 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
string(16) "my-awesome-title"
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/UTjoY on line 5
Process exited with code 255.