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<?php spl_autoload_register(function($class) { var_dump($class); }); var_dump(class_exists('\Foo\Bar/../../../../../../something'));
Output for 5.4.24 - 5.4.45, 5.5.8 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
bool(false)
Output for 5.3.3 - 5.3.29, 5.4.0 - 5.4.23, 5.5.0 - 5.5.7
string(35) "Foo\Bar/../../../../../../something" bool(false)
Output for 5.3.0 - 5.3.2
string(36) "\Foo\Bar/../../../../../../something" bool(false)
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/eWhP0 on line 2
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/eWhP0 on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/eWhP0 on line 2
Process exited with code 255.

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