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run code in 200+ php & hhvm versions
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<?php var_dump(preg_replace("/^[^a-zA-Z]+|[\!\#$\%\&\'\* \+\/\=\?\^\`{\|\}\~]+/", "", '_(32jkashdfkj$#'));
Output for 4.3.0 - 7.2.0
string(9) "jkashdfkj"