PHP：如何正确使用return语句

问题：我有一个名为“user”的类和一个名为“registerUser”的函数。我想将成功注册发送到某个页面，但未成功注册到其他页面

我没有填写返回声明，因为我不确定这是否是解决问题的方法。我对php还不熟悉，相信它可以工作，但正如我所说的，我是新手，还在学习

class User {
    function registerUser($userName, $userPassword) {
    // Connect to database
    $dbLink = mysql_connect($this->dbHost, $this->dbUser, $this->dbPass);
    if(!$dbLink) die("Could not connect to database. " . mysql_error());

    // Select database
    mysql_select_db($this->dbName);

    // Insert data
    $query = "insert into $this->dbUserTable values (NULL, \"$userName\", \"$userPassword\")";
    $result = mysql_query($query);

    // Test to make sure query worked
    if(!$result) {
        return(false);
    }

    // Get the user ID
    $this->userID = mysql_insert_id();

    // Close database connection
    mysql_close($dbLink);

    // Assign the values to the data members
    $this->userName = $userName;
    $this->userPassword = $userPassword;
    return(true);
} // End registerUser()
}

我调用这个类的php代码很简单

    <?
// processRegister.php
//////////////////////

// First include the class definition
include('UserClass.php');

// Next, create an instance of the class
$newUser = new User;

// Call the registerUser() method, passing in the required variables
if ($newUser->registerUser($userName, $userPassword)) {
  header('Location: www.google.com');
} 
else {
  header('Location: www.yahoo.com.com');
}
?>

非常感谢您的帮助

我会这样做：

if ($newUser->registerUser($userName, $userPassword)) {
  $newUser->displayUserInfo();
} else {
  echo "Errors, ahoy!"
}

如果需要调试消息，请去掉die语句，只添加return false或使用echo替换die并添加return false

---

最后，添加return true。

我认为您应该使用PHP函数mysql_insert_id返回最后插入的用户id。基于此，您可以确定注册过程是否成功

class User {
function registerUser($userName, $userPassword) {
        // Connect to database
        $dbLink = mysql_connect($this->dbHost, $this->dbUser, $this->dbPass);
        if(!$dbLink) die("Could not connect to database. " . mysql_error());

        // Select database
        mysql_select_db($this->dbName);

        // Insert data
        // Notice the "$userName" and "$userPassword" - these are the ones
        // passed in from your main script, not the class/object variables!
        $query = "insert into $this->dbUserTable values (NULL, \"$userName\", \"$userPassword\")";
        $result = mysql_query($query);

        return mysql_insert_id();

}

processRegister.php

<?
// processRegister.php
//////////////////////

// First include the class definition
include('UserClass.php');

// Next, create an instance of the class
$newUser = new User;

// Call the registerUser() method, passing in the required variables
$user_id = $newUser->registerUser($userName, $userPassword);

if(intval($user_id) && $user_id>0){
    //redirect to success page
}else{
    //redirect to error page
}

?> 

---

死而复生！我已经用我的新代码更新了问题，但它不起作用，你看到任何错误吗？我看不到：它正在把我发送到我的404页面。你的重定向中有一个额外的.com。