Class PHP 方法获取和设置

Question

我有这个class:

<?php
    class Test {

        private $_ID;
        private $_NAME;
        private $_AGE;

        public function setID() { $this->_ID++; }
        public function getID() { return $this->_ID; }

        public function setNAME($element) { $this->_NAME = $element; }
        public function getNAME() { return $this->_NAME; }

        public function setAGE($element) { $this->_AGE = $element; }
        public function getAGE() { return $this->_AGE; }

        public function addUser($name, $age) {
            Test::setID();
            Test::setNAME($name);
            Test::setAGE($age);

            echo "OK";
        }
    }
?>

我想创建此 class 的对象，并使用函数 addUser 分配数据，如下所示：

$test = new Test();
$test:: addUser("Peter", "12"); but I have errors.

我有这个错误：

Strict Standards: Non-static method Test::addUser() should not be called statically in /var/www/public/testManu.php on line 13

Strict Standards: Non-static method Test::setID() should not be called statically in /var/www/public/class/Test.php on line 18

Fatal error: Using $this when not in object context in /var/www/public/class/Test.php on line 8

我对变量范围有疑问。谁能告诉我我的问题是什么？？？？

Answer 1

改变这个：

 ...
 public function addUser($name, $age) {
        $this->setID();
        $this->setNAME($name);
        $this->setAGE($age);

        echo "OK";
    }
 ...

像Classname::function()这样的调用只对静态方法有效。您有一个专用实例，需要使用构造 $this->function().

来解决

因此：

   ...
  $test->addUser("Peter", "12"); but I have errors.

Answer 2

$test = new Test();
$test -> addUser("Peter", "12"); #now no errors

Answer 3

这应该适合你：

<?php
    class Test {

        private static $_ID = 1;
        private static $_NAME;
        private static $_AGE;

        public static function setID() { self::$_ID++; }
        public static function getID() { return self::$_ID; }

        public static function setNAME($element) { self::$_NAME = $element; }
        public static function getNAME() { return self::$_NAME; }

        public static function setAGE($element) { self::$_AGE = $element; }
        public static function getAGE() { return self::$_AGE; }

        public static function addUser($name, $age) {
            self::setID();
            self::setNAME($name);
            self::setAGE($age);

            echo "OK";
        }
    }

$test = new Test(); /*You don't need to instantiate the class 
                      because you're calling a static function*/
$test:: addUser("Peter", "12"); but I have errors.
?>

Class PHP 方法获取和设置

Class PHP methods get and set

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