当包含或需要外部文件时，无法使用后期静态绑定在PHP中扩展类

Question

Here's the source class:

require_once('database.php');

class DatabaseObject {

    public static function find_all()
    {
        $sql = "SELECT * FROM " .static::$dbName;
        $result = mysql_query($sql);
        while ($row = mysql_fetch_array($result, MYSQL_ASSOC))
        {
            echo "<div class = user>";
            echo "Name: {$row['first_name']} {$row['last_name']} <br/>";
            echo "E-Mail: {$row['email']} <br/>";
            echo "Username: {$row['username']} <br/>";
            echo "Password: {$row['password']}";
            echo "</div> <hr/>";
        }
    }


}

And here's the inheriting class:

require_once('database.php');
require('databaseobject.php');

class User extends DatabaseObject{

    public $id;
    public $first_name;
    public $last_name;
    public $emai;
    public $username;
    public $password;

    public static $dbValues = array(
        'id','first_name','last_name',
        'email','username','password'
    );
    public static $dbName = 'users';

}

User::find_all();

After trying to run user.php I get the following output:

> "; echo "E-Mail: {$row['email']} 
"; echo "Username: {$row['username']} 
"; echo "Password: {$row['password']}"; echo "
"; } } } ?>
Fatal error: Class 'DatabaseObject' not found in C:\wamp\www\library\includes\user.php on line 5

Does anyone have any idea of what's going on???? Everything works fine if the DatabaseObject class is in the same file as the user class thouth... not sure whats going on with the include.

Answer 1

I am very embarrassed to say that I was missing the ?php tag at the top of the DatabaseObject.php file. Sorry for wasting everyone's time. :(