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<?php class Foo { public function test( self $arg = null ){ echo get_class( $arg ) . "\n"; } } $foo = new Foo(); $bar = new Foo(); $foo->test( $bar ); $foo->test();
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Foo Fatal error: Uncaught TypeError: get_class(): Argument #1 ($object) must be of type object, null given in /in/kJSBo:5 Stack trace: #0 /in/kJSBo(13): Foo->test() #1 {main} thrown in /in/kJSBo on line 5
Process exited with code 255.
Output for 5.3.0, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Foo Warning: get_class() expects parameter 1 to be object, null given in /in/kJSBo on line 5
Output for 5.3.1 - 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, 7.1.0 - 7.1.33
Foo Foo
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Foo
Output for 5.0.0 - 5.0.5
Foo Fatal error: Argument 1 must not be null in /in/kJSBo on line 4
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/kJSBo 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/kJSBo 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/kJSBo on line 4
Process exited with code 255.

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