PHP函數沒有返回值

Question

出於某種原因，我不能讓我的函數返回一個字符串...

$password = crypt_password_input($password, ""); 

//Encrypt Password longer than 8 characters 
function crypt_password_input($inputPassword, $newPassword) 
{ 
    $passwordLength = strlen($inputPassword); 

    if($passwordLength > 8){ 
     $encryptString = substr($inputPassword, 0, 8); 
     $inputPassword = substr($inputPassword, 8); 
     $newPassword .= crypt($encryptString, "HIDDENSALT"); 
     crypt_password_input($inputPassword, $newPassword); 
    }else{ 
     $newPassword .= crypt($inputPassword, "HIDDENSALT"); 
     echo "Final: " . $newPassword . "<br/>"; 
     return $newPassword; 
    } 
} 


echo "Encrypted from the input: " . $password . "<br/>"; 

這是這個腳本的輸出...

決賽：ltu1GUwy71wHkltVbYX1aNLfLYltEZ7Ww8GghfM
從輸入加密：

Answer 1

您在此條件下沒有return語句塊。我在那裏增加了回報。

if($passwordLength > 8) 
{ 
    $encryptString = substr($inputPassword, 0, 8); 
    $inputPassword = substr($inputPassword, 8); 
    $newPassword .= crypt($encryptString, "HIDDENSALT"); 
    return crypt_password_input($inputPassword, $newPassword); 
} 

Answer 2

我不知道你的邏輯，但你的代碼應該是這樣的：

$password = crypt_password_input($password, ""); 

//Encrypt Password longer than 8 characters 
function crypt_password_input($inputPassword, $newPassword) 
{ 
    $passwordLength = strlen($inputPassword); 

    if($passwordLength > 8) 
    { 
     $encryptString = substr($inputPassword, 0, 8); 
     $inputPassword = substr($inputPassword, 8); 
     $newPassword .= crypt($encryptString, "HIDDENSALT"); 
     return crypt_password_input($inputPassword, $newPassword); 
    } 
    else 
    { 
     $newPassword .= crypt($inputPassword, "HIDDENSALT"); 
     echo "Final: " . $newPassword . "<br/>"; 
     return $newPassword; 
    } 
} 


echo "Encrypted from the input: " . $password . "<br/>"; 

在代碼中，你是遞歸調用的輸入，但不返回任何東西，所以它失敗，如果你有超過8個字符的密碼。