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<?php var_dump(unserialize('a:2:{i:0;O:9:"exception":1:{s:16:"'."\0".'Exception'."\0".'trace";s:4:"test";}i:1;R:3;}'));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught TypeError: Cannot assign string to property Exception::$trace of type array in /in/M24t8:2 Stack trace: #0 /in/M24t8(2): unserialize('a:2:{i:0;O:9:"e...') #1 {main} thrown in /in/M24t8 on line 2
Process exited with code 255.
Output for 7.0.20, 7.1.5 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
array(2) { [0]=> object(Exception)#1 (6) { ["message":protected]=> string(0) "" ["string":"Exception":private]=> string(0) "" ["code":protected]=> int(0) ["file":protected]=> string(9) "/in/M24t8" ["line":protected]=> int(2) ["previous":"Exception":private]=> NULL } [1]=> string(4) "test" }
Output for 7.1.0
array(1) { [0]=> object(Exception)#1 (6) { ["message":protected]=> string(0) "" ["string":"Exception":private]=> string(0) "" ["code":protected]=> int(0) ["file":protected]=> string(9) "/in/M24t8" ["line":protected]=> int(2) ["previous":"Exception":private]=> NULL } }
Output for 7.0.0 - 7.0.6
array(1) { [0]=> object(Exception)#1 (5) { ["message":protected]=> string(0) "" ["string":"Exception":private]=> string(0) "" ["code":protected]=> int(0) ["file":protected]=> string(9) "/in/M24t8" ["line":protected]=> int(2) } }
Output for 5.5.28 - 5.5.35, 5.6.12 - 5.6.21
array(2) { [0]=> object(Exception)#1 (5) { ["message":protected]=> string(0) "" ["string":"Exception":private]=> string(0) "" ["code":protected]=> int(0) ["file":protected]=> string(9) "/in/M24t8" ["line":protected]=> int(2) } [1]=> string(4) "test" }
Output for 5.5.24 - 5.5.27, 5.6.8 - 5.6.11
array(2) { [0]=> object(Exception)#1 (7) { ["message":protected]=> string(0) "" ["string":"Exception":private]=> string(0) "" ["code":protected]=> int(0) ["file":protected]=> string(9) "/in/M24t8" ["line":protected]=> int(2) ["trace":"Exception":private]=> &string(4) "test" ["previous":"Exception":private]=> NULL } [1]=> &string(4) "test" }

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