What are the advantages and disadvantages of using !!$value as a shorthand method to check for values like 0, "0", and "" in PHP?

When checking for values like 0, "0", and "", using !!$value as a shorthand method can be advantageous because it converts the value to a boolean, making the comparison more explicit. However, this method may not be as clear and readable as using explicit comparisons like ($value === 0 || $value === "0" || $value === ""). It may also be less intuitive for developers who are not familiar with this shorthand notation. 

// Using explicit comparisons for checking values like 0, "0", and ""
if ($value === 0 || $value === "0" || $value === "") {
    // Value is 0, "0", or ""
    echo "Value is 0, '0', or empty string";
} else {
    // Value is not 0, "0", or ""
    echo "Value is not 0, '0', or empty string";
}

Keywords

type juggling truthy falsy coercion empty string

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