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<?php session_start(); session_decode('test|s:4:high|s:1:"a";'); var_dump($_SESSION);
Output for 5.4.45, 5.5.29 - 5.5.35, 5.6.13 - 7.2.0
Warning: session_decode(): Failed to decode session object. Session has been destroyed in /in/K9NUn on line 4 array(0) { }
Output for 5.3.20 - 5.4.44, 5.5.24 - 5.5.28, 5.6.8 - 5.6.12
array(2) { ["test"]=> NULL ["s:4:high"]=> string(1) "a" }