string(8) "var_dump"
Fatal error: Uncaught TypeError: foo(): Argument #1 ($a) must be of type callable, null given, called in /in/7hB4e on line 7 and defined in /in/7hB4e:2
Stack trace:
#0 /in/7hB4e(7): foo(NULL)
#1 {main}
thrown in /in/7hB4e on line 2
Process exited with code 255.
string(8) "var_dump"
Fatal error: Uncaught TypeError: Argument 1 passed to foo() must be callable, null given, called in /in/7hB4e on line 7 and defined in /in/7hB4e:2
Stack trace:
#0 /in/7hB4e(7): foo(NULL)
#1 {main}
thrown in /in/7hB4e on line 2
Process exited with code 255.
string(8) "var_dump"
Catchable fatal error: Argument 1 passed to foo() must be callable, null given, called in /in/7hB4e on line 7 and defined in /in/7hB4e on line 2
Process exited with code 255.
Output for 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Catchable fatal error: Argument 1 passed to foo() must be an instance of Callable, string given, called in /in/7hB4e on line 6 and defined in /in/7hB4e on line 2
Process exited with code 255.
Output for 5.1.0 - 5.1.6
Fatal error: Argument 1 passed to foo() must be an object of class Callable, called in /in/7hB4e on line 6 and defined in /in/7hB4e on line 2
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Fatal error: Argument 1 must be an object of class Callable in /in/7hB4e on line 2
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting ')' in /in/7hB4e on line 2
Process exited with code 255.