Question

请帮我修改此代码，以便greet函数返回预期值。

 class Person {
      public $name;
      public function __construct($name) {
        $this->name = $name;
      }
      public function greet($guest) {
        return 'Hello $guest, my name is $name';
      }
    }

Answer 1

我发现的问题是引号。更改single quotes to double。同样，您不能直接使用变量。与@Override protected void onStart() { //GetStudentResults(); semester.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { switch (position) { case 0: inn = getIntent(); regTester = inn.getStringExtra("RegNumber"); sem = semester.getSelectedItem().toString(); yr = year_of_study.getSelectedItem().toString(); Load(regTester, sem, yr); break; case 1: inn = getIntent(); regTester = inn.getStringExtra("RegNumber"); sem = semester.getSelectedItem().toString(); yr = year_of_study.getSelectedItem().toString(); Load(regTester, sem, yr); break; case 2: inn = getIntent(); regTester = inn.getStringExtra("RegNumber"); sem = semester.getSelectedItem().toString(); yr = year_of_study.getSelectedItem().toString(); Load(regTester, sem, yr); break; } } @Override public void onNothingSelected(AdapterView<?> parent) { } }); year_of_study.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { switch (position) { case 0: inn = getIntent(); regTester = inn.getStringExtra("RegNumber"); sem = semester.getSelectedItem().toString(); yr = year_of_study.getSelectedItem().toString(); Load(regTester, sem, yr); break; case 1: inn = getIntent(); regTester = inn.getStringExtra("RegNumber"); sem = semester.getSelectedItem().toString(); yr = year_of_study.getSelectedItem().toString(); Load(regTester, sem, yr); break; case 2: inn = getIntent(); regTester = inn.getStringExtra("RegNumber"); sem = semester.getSelectedItem().toString(); yr = year_of_study.getSelectedItem().toString(); Load(regTester, sem, yr); break; case 3: inn = getIntent(); regTester = inn.getStringExtra("RegNumber"); sem = semester.getSelectedItem().toString(); yr = year_of_study.getSelectedItem().toString(); Load(regTester, sem, yr); break; case 4: inn = getIntent(); regTester = inn.getStringExtra("RegNumber"); sem = semester.getSelectedItem().toString(); yr = year_of_study.getSelectedItem().toString(); Load(regTester, sem, yr); break; case 5: inn = getIntent(); regTester = inn.getStringExtra("RegNumber"); sem = semester.getSelectedItem().toString(); yr = year_of_study.getSelectedItem().toString(); Load(regTester, sem, yr); break; } } @Override public void onNothingSelected(AdapterView<?> parent) { } }); //load2(); super.onStart(); }

一起使用

$this->name

将打印：

class Person {
    public $name;
    public function __construct($name) {
        $this->name = $name;
    }
    public function greet($guest) {
        return "Hello $guest, my name is $this->name";
    }
}

$p = new Person("Bob");

echo $p->greet("Alice");

更正此代码，以便greet函数返回预期值

1 个答案: