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<?php class c { public function m() { $this->trace(); } protected function trace() { print_r(debug_backtrace()); } } function f() { (new c)->m(); } f(); ?>
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 - 7.1.10, 7.2.0 - 7.2.33, 7.3.16 - 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
Array ( [0] => Array ( [file] => /in/rs8pn [line] => 5 [function] => trace [class] => c [object] => c Object ( ) [type] => -> [args] => Array ( ) ) [1] => Array ( [file] => /in/rs8pn [line] => 14 [function] => m [class] => c [object] => c Object ( ) [type] => -> [args] => Array ( ) ) [2] => Array ( [file] => /in/rs8pn [line] => 17 [function] => f [args] => Array ( ) ) )
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/rs8pn on line 14
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_OBJECT_OPERATOR in /in/rs8pn on line 14
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/rs8pn 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/rs8pn 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/rs8pn on line 4
Process exited with code 255.

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