What are best practices for passing variables to anonymous functions in PHP?

When passing variables to anonymous functions in PHP, it is recommended to use the "use" keyword to import variables from the parent scope into the anonymous function. This ensures that the variables are accessible within the function without having to pass them as arguments explicitly. 

// Example of passing variables to an anonymous function using the "use" keyword
$variable = 'Hello';

$anonymousFunction = function() use ($variable) {
    echo $variable;
};

$anonymousFunction(); // Output: Hello

Keywords

anonymous functions variables passing PHP functions

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