What are the implications of using sizeof() instead of array_sum() for checking the validity of a boolean array in PHP?

Using sizeof() to check the validity of a boolean array in PHP is not accurate because sizeof() will return the total number of elements in the array, not the sum of the boolean values. To accurately check the validity of a boolean array, you should use array_sum() to calculate the sum of the boolean values, as true will be counted as 1 and false as 0.

// Incorrect way using sizeof()
$array = [true, false, true, true];
$size = sizeof($array); // This will return 4

// Correct way using array_sum()
$array = [true, false, true, true];
$sum = array_sum($array); // This will return 3