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<?php var_dump(unserialize('O:3:"PDO":1:{s:3:"dsn";s:17:"sqlite:exampl.php";}'));
Output for 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Uncaught Exception: Unserialization of 'PDO' is not allowed in /in/iBP68:2 Stack trace: #0 /in/iBP68(2): unserialize('O:3:"PDO":1:{s:...') #1 {main} thrown in /in/iBP68 on line 2
Process exited with code 255.
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
Warning: Erroneous data format for unserializing 'PDO' in /in/iBP68 on line 2 Notice: unserialize(): Error at offset 13 of 49 bytes in /in/iBP68 on line 2 bool(false)
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Fatal error: Uncaught PDOException: You cannot serialize or unserialize PDO instances in /in/iBP68:2 Stack trace: #0 [internal function]: PDO->__wakeup() #1 /in/iBP68(2): unserialize('O:3:"PDO":1:{s:...') #2 {main} thrown in /in/iBP68 on line 2
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28
Fatal error: Uncaught exception 'PDOException' with message 'You cannot serialize or unserialize PDO instances' in /in/iBP68:2 Stack trace: #0 [internal function]: PDO->__wakeup() #1 /in/iBP68(2): unserialize('O:3:"PDO":1:{s:...') #2 {main} thrown in /in/iBP68 on line 2
Process exited with code 255.
Output for 5.0.0 - 5.0.5
object(__PHP_Incomplete_Class)#1 (2) { ["__PHP_Incomplete_Class_Name"]=> string(3) "PDO" ["dsn"]=> string(17) "sqlite:exampl.php" }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
object(__PHP_Incomplete_Class)(2) { ["__PHP_Incomplete_Class_Name"]=> string(3) "pdo" ["dsn"]=> string(17) "sqlite:exampl.php" }

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