Question

我是PHP OOP的新手，我有一个问题，我想在另一个类中访问一个类的成员数据和函数。我谷歌但没有得到任何完美的解决方案。

这是我的示例代码：

class school{
 public function teacher()
 {
   $teacher_name='Ali Raza';

 }
 public static function students()
     {

       echo"STUDENT DATA: Jhon Deo";

     }


}
 class library{
     public function teacher_name()
     {
      // Now here i want to acces the name of teacher form above class function teacher.

     }
public function student_name()
         {
      // Now here i want to access the member function(students) from school class.

         }
    }

我是新来的。提前谢谢。

Answer 1

尝试将类学校的功能访问到类库函数中：

class school {
    public function teacher()
    {
        $teacher_name='Ali Raza';

    }

    public function students()
    {
        echo"STUDENT DATA: Jhon Deo";
    }
}

class library {
    public function teacher_name()
    {
        // Now here i want to acces the name of teacher form above class function teacher.
    }

    public static function student_name()
    {
        echo School::students();
    }
}

Answer 2

您需要实例化包含您要访问的数据的类。或者，您可以定义数据静态并访问它而无需实例化。

看看这个：

class library{
 private $getTeacherInstance;
 public function teacher_name()
 {
    if(!$getTeacherInstance) // if instance is not created
      $this->getTeacherInstance = new school(); // then get a new instance
    return $this->getTeacherInstance->teacher(); // call the method exists inside `school class`
 }
}

让您的teacher（）函数返回一些数据，如＆＃34;教师姓名＆＃34;

Answer 3

试试这个。这是一个继承从学校类到库类的php类。

main函数将访问从类类中获取数据的库类所需的数据。

希望这有帮助

<?php

class school{

  public $teacher_name;
  public $students_name;

  public function getTeacherName(){
     return $this->teacher_name;
  }

  public function setTeacherName(){
    $this->teacher_name = "Ali Raza";
  }

  public function getStudentName(){
     return $this->students_name;
  }

  public function setStudentName(){
     $this->students_name = "Ali Raza";
  }


}

/**
* 
*/
class library extends school
{
    //this will get the value from class school
}

function showAll(){
  $showAll = new library();
  $showAll->setTeacherName();
  echo "Teacher Name: " . $showAll->getTeacherName() . '<br>';
  echo "Studnet Name: ". $showAll->getStudentName();
}

showAll();

如何在php中访问其他类中的一个类的函数和数据

3 个答案: