How can variables be emptied using a function in PHP without passing them as arguments or using a return statement?

To empty variables in PHP without passing them as arguments or using a return statement, you can use the `unset()` function within a custom function. By passing the variable by reference, you can modify it directly within the function without needing to return it. This allows you to unset the variable and empty its value without explicitly passing it as an argument. 

function emptyVariable(&$var) {
    unset($var);
}

$myVar = "Hello";
emptyVariable($myVar);
echo isset($myVar) ? "Variable is set" : "Variable is unset"; // Output: Variable is unset

Keywords

PHP variables function unset pass by reference

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