How can the use of "==" versus "===" impact the functionality of PHP code, specifically in comparison operations?

Using "==" in PHP compares two values after type juggling, which can lead to unexpected results. On the other hand, using "===" compares both the value and the type of the variables, ensuring a more accurate comparison. To avoid issues with comparison operations in PHP, it is recommended to use "===" for strict comparisons.

// Incorrect comparison using "=="
$num = 5;
$str_num = "5";

if($num == $str_num){
    echo "Equal";
} else {
    echo "Not equal";
}

// Correct comparison using "==="
$num = 5;
$str_num = "5";

if($num === $str_num){
    echo "Equal";
} else {
    echo "Not equal";
}