How can PHP developers ensure the security of user data when storing sensitive information like passwords, especially in light of deprecated functions like md5?

To ensure the security of user data when storing sensitive information like passwords, PHP developers should use modern cryptographic functions like password_hash() and password_verify() instead of deprecated functions like md5. This ensures that passwords are securely hashed and stored in a way that is resistant to common attacks like rainbow tables. 

// Hashing a password using password_hash()
$password = "secret_password";
$hashed_password = password_hash($password, PASSWORD_DEFAULT);

// Verifying a password using password_verify()
$entered_password = "secret_password";
if (password_verify($entered_password, $hashed_password)) {
    echo "Password is correct!";
} else {
    echo "Password is incorrect!";
}

Keywords

PHP security user data passwords sensitive information deprecated functions

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