Enforce type safety by automatically adding PHP type definitions where it may be inferred from DocBlock @param, @return, and @var tags and code context.

Before

/**
 * This returns the sum of two integers.
 *
 * @param int $a
 * @param int $b
 * @return int
 */
public function add($a, $b)
{
    /** @var int */
    $sum = $a + $b;
 
    return $sum;
}

After

/**
 * This returns the sum of two integers.
 */
public function add(int $a, int $b): int
{
    $sum = $a + $b;
 
    return $sum;
}