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<?php spl_autoload_register( function($class) { var_dump('Autoload: '.$class); return false; } ); var_dump(is_a(1, 'Foo')); var_dump(is_a(2, 'Foo', false)); var_dump(is_a(3, 'Foo', true)); var_dump(is_a('a', 'Foo')); var_dump(is_a('b', 'Foo', false)); var_dump(is_a('c', 'Foo', true));
Output for 5.3.9 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
bool(false) bool(false) bool(false) bool(false) bool(false) string(11) "Autoload: c" bool(false)
Output for 5.3.7 - 5.3.8
bool(false) Warning: is_a() expects exactly 2 parameters, 3 given in /in/XG8B1 on line 11 NULL Warning: is_a() expects exactly 2 parameters, 3 given in /in/XG8B1 on line 12 NULL string(11) "Autoload: a" bool(false) Warning: is_a() expects exactly 2 parameters, 3 given in /in/XG8B1 on line 15 NULL Warning: is_a() expects exactly 2 parameters, 3 given in /in/XG8B1 on line 16 NULL
Output for 5.3.0 - 5.3.6
bool(false) Warning: is_a() expects exactly 2 parameters, 3 given in /in/XG8B1 on line 11 NULL Warning: is_a() expects exactly 2 parameters, 3 given in /in/XG8B1 on line 12 NULL bool(false) Warning: is_a() expects exactly 2 parameters, 3 given in /in/XG8B1 on line 15 NULL Warning: is_a() expects exactly 2 parameters, 3 given in /in/XG8B1 on line 16 NULL
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION, expecting ')' in /in/XG8B1 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, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION, expecting ')' in /in/XG8B1 on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/XG8B1 on line 4
Process exited with code 255.
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