What are the limitations of type checking in PHP, especially when it comes to strings, integers, floats, and booleans?

PHP's type checking is weak, especially when it comes to strings, integers, floats, and booleans. In PHP, the `==` operator checks for equality without considering the types, which can lead to unexpected results. To solve this issue, it's recommended to use the `===` operator, which checks for both value and type equality.

// Weak type checking
$var1 = 10;
$var2 = "10";

if($var1 == $var2) {
    echo "Equal";
} else {
    echo "Not Equal";
}

// Strong type checking
if($var1 === $var2) {
    echo "Equal";
} else {
    echo "Not Equal";
}