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<?php class foo { function __construct () { $this->bar('1'); } private function bar ( $param ) { echo 'Called function foo:bar('.$param.');<br>'; } } $foo = new foo(); call_user_func_array( array( $foo , 'bar' ) , array( '2' ) ); $foo->bar('3');
Output for 8.0.10 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Called function foo:bar(1);<br> Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, cannot access private method foo::bar() in /in/7b1CR:13 Stack trace: #0 {main} thrown in /in/7b1CR on line 13
Process exited with code 255.
Output for 8.0.0 - 8.0.9
Called function foo:bar(1);<br> Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($function) must be a valid callback, cannot access private method foo::bar() in /in/7b1CR:13 Stack trace: #0 {main} thrown in /in/7b1CR on line 13
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33
Called function foo:bar(1);<br> Warning: call_user_func_array() expects parameter 1 to be a valid callback, cannot access private method foo::bar() in /in/7b1CR on line 13 Fatal error: Uncaught Error: Call to private method foo::bar() from context '' in /in/7b1CR:15 Stack trace: #0 {main} thrown in /in/7b1CR on line 15
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28
Called function foo:bar(1);<br> Warning: call_user_func_array() expects parameter 1 to be a valid callback, cannot access private method foo::bar() in /in/7b1CR on line 13 Fatal error: Call to private method foo::bar() from context '' in /in/7b1CR on line 15
Process exited with code 255.
Output for 5.1.2 - 5.1.6, 5.2.0 - 5.2.17
Called function foo:bar(1);<br> Warning: call_user_func_array(): First argument is expected to be a valid callback, 'foo::bar' was given in /in/7b1CR on line 13 Fatal error: Call to private method foo::bar() from context '' in /in/7b1CR on line 15
Process exited with code 255.
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.1
Called function foo:bar(1);<br> Fatal error: Call to private method foo::bar() from context '' in /in/7b1CR on line 13
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/7b1CR on line 6
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/7b1CR on line 6
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/7b1CR on line 6
Process exited with code 255.

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