Online PHP editor | output for rRh5G

Output for 8.3.0 - 8.3.6: Warning: unserialize(): Error at offset 31 of 31 bytes in /in/rRh5G on line 13 object(Test)#2 (1) { ["a":protected]=> array(0) { } } object(Test)#1 (1) { ["a":protected]=> array(0) { } } bool(false)
Output for 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18: Notice: unserialize(): Error at offset 31 of 31 bytes in /in/rRh5G on line 13 object(Test)#2 (1) { ["a":protected]=> array(0) { } } object(Test)#1 (1) { ["a":protected]=> array(0) { } } bool(false)
Output for 7.3.32 - 7.3.33: object(Test)#2 (1) { ["a":protected]=> array(0) { } } object(Test)#1 (1) { ["a":protected]=> array(0) { } } bool(false)
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.7: Notice: unserialize(): Error at offset 32 of 31 bytes in /in/rRh5G on line 13 object(Test)#2 (1) { ["a":protected]=> array(0) { } } object(Test)#1 (1) { ["a":protected]=> array(0) { } } bool(false)
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29: Parse error: syntax error, unexpected T_OBJECT_OPERATOR in /in/rRh5G on line 11
Process exited with code 255.
Output for 5.0.0 - 5.0.5: Parse error: parse error, unexpected T_OBJECT_OPERATOR in /in/rRh5G on line 11
Process exited with code 255.
Output for 4.4.2 - 4.4.9: Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/rRh5G on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1: Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/rRh5G on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/rRh5G on line 4
Process exited with code 255.