What is the significance of type-juggling in PHP and how does it affect function parameters?

Type-juggling in PHP refers to the automatic conversion of variables from one data type to another. This can sometimes lead to unexpected behavior, especially when passing parameters to functions that expect specific data types. To prevent issues related to type-juggling, it's important to explicitly check and convert function parameters to the expected data type before using them in the function. 

function calculateSum(int $num1, int $num2) {
    return $num1 + $num2;
}

$param1 = "10";
$param2 = "20";

$result = calculateSum((int) $param1, (int) $param2);
echo $result; // Output: 30

Keywords

type-juggling PHP function parameters data types coercion

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