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run code in 200+ php & hhvm versions
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<?php $password = 'test'; $salt = '$2a$09$' . md5(time()) . '$'; var_dump(crypt($password, $salt));
Output for 5.3.0 - 7.1.7
string(60) "$2a$09$cb7aacc2a991622316bbau8cqCWc92i1o/pdNZRSgo9ZKt85ZBMIC"
Output for 4.3.0 - 5.2.17

Process exited with code 139.