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<?php class a { public function b($x = [1,2,3,4]) { echo __METHOD__, PHP_EOL; echo __FUNCTION__, PHP_EOL; if (is_array($x)) { array_walk($x, __FUNCTION__); } else { echo $x; } } } $b = new a(); $b->b();
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
a::b b Fatal error: Uncaught TypeError: array_walk(): Argument #2 ($callback) must be a valid callback, function "b" not found or invalid function name in /in/tI56T:10 Stack trace: #0 /in/tI56T(10): array_walk(Array, 'b') #1 /in/tI56T(19): a->b() #2 {main} thrown in /in/tI56T on line 10
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 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
a::b b Warning: array_walk() expects parameter 2 to be a valid callback, function 'b' not found or invalid function name in /in/tI56T on line 10
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 '[' in /in/tI56T on line 5
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/tI56T on line 5
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/tI56T on line 5
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/tI56T on line 5
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/tI56T on line 5
Process exited with code 255.
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