How can PHP developers ensure that the correct data type is passed to functions like imagefill() to avoid errors?

PHP developers can ensure that the correct data type is passed to functions like imagefill() by validating the input data before calling the function. This can be done by using functions like is_resource() or is_int() to check if the input is of the expected type. By validating the input data, developers can prevent errors that may occur due to incorrect data types being passed to functions. 

// Validate input data before calling imagefill()
if (is_resource($image) && is_int($x) && is_int($y) && is_int($color)) {
    imagefill($image, $x, $y, $color);
} else {
    echo "Invalid input data types.";
}

Keywords

PHP data type imagefill() functions errors

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