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<?php class Foo { public static function bar() { return __METHOD__; } } function call(callable $func) { $func(); } // works $callable = array('Foo', 'bar'); var_dump($callableArr()); var_dump(call($callableArr())); // Call to undefined function Foo::bar() $callable = 'Foo::bar'; // var_dump($callableStr()); var_dump(call($callableStr()));
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
Warning: Undefined variable $callableArr in /in/j7uIq on line 16 Fatal error: Uncaught Error: Value of type null is not callable in /in/j7uIq:16 Stack trace: #0 {main} thrown in /in/j7uIq on line 16
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
Notice: Undefined variable: callableArr in /in/j7uIq on line 16 Fatal error: Uncaught Error: Function name must be a string in /in/j7uIq:16 Stack trace: #0 {main} thrown in /in/j7uIq on line 16
Process exited with code 255.
Output for 7.3.32 - 7.3.33, 7.4.26
Fatal error: Uncaught Error: Function name must be a string in /in/j7uIq:16 Stack trace: #0 {main} thrown in /in/j7uIq on line 16
Process exited with code 255.
Output for 5.5.0 - 5.5.35, 5.6.0 - 5.6.28
Notice: Undefined variable: callableArr in /in/j7uIq on line 16 Fatal error: Function name must be a string in /in/j7uIq on line 16
Process exited with code 255.
Output for 5.2.3 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45
Fatal error: Function name must be a string in /in/j7uIq on line 16
Process exited with code 255.
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.2
<br /> <b>Fatal error</b>: Function name must be a string in <b>/in/j7uIq</b> on line <b>16</b><br />
Process exited with code 255.
Output for 4.4.2 - 4.4.9
<br /> <b>Parse error</b>: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in <b>/in/j7uIq</b> on line <b>4</b><br />
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
<br /> <b>Parse error</b>: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in <b>/in/j7uIq</b> on line <b>4</b><br />
Process exited with code 255.
Output for 4.3.2 - 4.3.4
<br /> <b>Parse error</b>: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in <b>/in/j7uIq</b> on line <b>4</b><br />
Process exited with code 255.
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