$a1="";
$plaintextPassword = "your_password_here";
$storedHash = "$2y$10$f3SepbOag1dDP/gHeyYujOMXTEt9os75xdK5QcqZaBPCzT4ouGRIO";

if (password_verify($plaintextPassword, $storedHash)) {
    echo "Password is valid!";
} else {
    echo "Invalid password.";
}