What is the difference between a type weak comparison (==) and a type strict comparison (===) in PHP?

In PHP, the difference between a type weak comparison (==) and a type strict comparison (===) lies in how they handle data types. Type weak comparison only checks if the values are equal, while type strict comparison also checks if the data types are the same. To ensure accurate comparisons, it is recommended to use type strict comparison (===) to avoid unexpected results.

// Type weak comparison
$a = 5;
$b = '5';

if ($a == $b) {
    echo "Values are equal";
} else {
    echo "Values are not equal";
}

// Type strict comparison
$a = 5;
$b = '5';

if ($a === $b) {
    echo "Values and data types are equal";
} else {
    echo "Values or data types are not equal";
}