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run code in 200+ php & hhvm versions
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<?php spl_autoload_register(); var_dump(unserialize('O:5:"ZO2j7":0:{}'));
based on VIK1p
Output for 7.0.6 - 7.2.0
object(__PHP_Incomplete_Class)#1 (1) { ["__PHP_Incomplete_Class_Name"]=> string(5) "ZO2j7" }
Output for 7.0.0 - 7.0.5
Fatal error: Uncaught LogicException: Class ZO2j7 could not be loaded in /in/7ZfMk:5 Stack trace: #0 [internal function]: spl_autoload('ZO2j7') #1 /in/7ZfMk(5): unserialize('O:5:"ZO2j7":0:{...') #2 {main} thrown in /in/7ZfMk on line 5
Process exited with code 255.
Output for 5.3.19 - 5.6.28
Fatal error: Uncaught exception 'LogicException' with message 'Class ZO2j7 could not be loaded' in /in/7ZfMk:5 Stack trace: #0 [internal function]: spl_autoload('ZO2j7') #1 /in/7ZfMk(5): unserialize('O:5:"ZO2j7":0:{...') #2 {main} thrown in /in/7ZfMk on line 5
Process exited with code 255.