1.2.274. Could Be Typehinted Callable¶
Those arguments may use the callable Typehint.
‘callable’ is a PHP keyword that represents callback functions. Those may be used in dynamic function call, like $function(); or as callback functions, like with array_map();
callable may be a string representing a function name or a static call (including ::), an array with two elements, (a class or object, and a method), or a closure <https://www.php.net/`closure>`_.
When arguments are used to call a function, but are not marked with ‘callable’, they are reported by this analysis.
<?php
function foo(callable $callable) {
// very simple callback
return $callable();
}
function foo2($array, $callable) {
// very simple callback
return array_map($array, $callable);
}
?>
See also Callback / callable.
1.2.274.1. Suggestions¶
Add the typehint callable
Use the function is_callable() inside the method if ‘callable’ is too strong.
1.2.274.2. Specs¶
Short name |
Functions/CouldBeCallable |
Rulesets |
|
Exakat since |
0.10.5 |
PHP Version |
All |
Severity |
Minor |
Time To Fix |
Quick (30 mins) |
Precision |
Very high |
Features |
callable |
Examples |
|
Available in |