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<?php class Foo { public function __toString() { return $this; } } var_dump((string) (new Foo()));
Output for 8.3.5 - 8.3.6
Fatal error: Out of memory (allocated 73830400 bytes) (tried to allocate 5009408 bytes) in /in/mZ5a7 on line 0 mmap() failed: [12] Cannot allocate memory
Process exited with code 255.
Output for 8.3.0 - 8.3.4
Fatal error: Out of memory (allocated 23068672 bytes) (tried to allocate 24576 bytes) in /in/mZ5a7 on line 0 mmap() failed: [12] Cannot allocate memory mmap() failed: [12] Cannot allocate memory mmap() failed: [12] Cannot allocate memory
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18

Process exited with code 139.
Output for 7.4.0 - 7.4.33
Fatal error: Uncaught Error: Method Foo::__toString() must return a string value in /in/mZ5a7:9 Stack trace: #0 {main} thrown in /in/mZ5a7 on line 9
Process exited with code 255.
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Recoverable fatal error: Method Foo::__toString() must return a string value in /in/mZ5a7 on line 9
Process exited with code 255.
Output for 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, 7.0.0 - 7.0.20
Catchable fatal error: Method Foo::__toString() must return a string value in /in/mZ5a7 on line 9
Process exited with code 255.
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
string(12) "Object id #1"
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/mZ5a7 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/mZ5a7 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/mZ5a7 on line 4
Process exited with code 255.

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