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run code in 150+ php & hhvm versions
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<?php $q ="myzig@sermon.net +="; var_dump(preg_replace("/([^\w\d ])/ui", '\' . '$1', $q));
Output for 5.3.0 - 5.4.22
Parse error: syntax error, unexpected '$' in /in/9VkpO on line 9
Process exited with code 255.