Code Inspection: Closure can be converted to arrow function

Reports the anonymous functions that can be transformed to short arrow functions. Support for short arrow functions is available since PHP 7.4.

In the following example, the callback anonymous function inside array_map() is written in two forms: regular and arrow.

$myArr = [1, 2, 3, 4, 5, 6];

$doubledValues = array_map(function ($var) {
    return $var * 2;
}, $myArr);

$myArr = [1, 2, 3, 4, 5, 6];

$doubledValues = array_map(fn ($var) => $var * 2, $myArr);

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Last modified: 16 May 2022