How can PHP developers prevent users from setting the same password during the password recovery process?

To prevent users from setting the same password during the password recovery process, PHP developers can store a hash of the user's current password in the database and compare it with the new password during the recovery process. If the new password matches the hash of the current password, the system can reject the change and prompt the user to choose a different password. 

// Assuming $currentPasswordHash contains the hash of the user's current password
$newPassword = $_POST['new_password'];
$newPasswordHash = password_hash($newPassword, PASSWORD_DEFAULT);

if ($newPasswordHash == $currentPasswordHash) {
    // Passwords match, prompt user to choose a different password
    echo "Please choose a different password.";
} else {
    // Update the password in the database with the new hash
    // Redirect user to success page
}

Keywords

PHP password recovery prevent same password validation

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