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run code in 150+ php & hhvm versions
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<?php ini_set('session.save_handler', 'aaaa"bbbb'); var_dump(ini_get('session.save_handler'));
based on JsD1f
Output for 5.4.35 - 5.6.28, 7.0.0 - 7.1.0
Warning: ini_set(): Cannot find save handler 'aaaa"bbbb' in /in/pPG2L on line 3 string(5) "files"
Output for hhvm-3.12.0
string(0) ""
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.3.5 - 5.4.34
Warning: ini_set() has been disabled for security reasons in /in/pPG2L on line 3 string(5) "files"
Output for 4.3.1 - 4.3.4
Warning: ini_set,pcntl_fork() has been disabled for security reasons in /in/pPG2L on line 3 string(5) "files"
Output for 4.3.0
string(9) "aaaa"bbbb"