如何從PHP7中的數組中獲取元素？

Question

我有下一個代碼，我想要做的是保存並加載數組中的元素數量，並將它們顯示在我聲明爲show（）的函數中，但是在我聲明函數內部的構造函數foreach 秀（）我有一個錯誤

注意：未定義的變量：$ COMPLETE_NAME

，但如果我宣佈在功能相同的foreach保存，我得到正確的結果。

<?php 

class Person{ 

    public $name; 
    public $lastName; 

    public function save($name, $lastName){ 

     $COMPLETE_NAME = array(
      "NAME" => $name, 
      "LAST_NAME" => $lastName 
     ); 
    } 

    public function show(){ 
     foreach($COMPLETE_NAME as $list){ 
      echo $list; 
     } 
    } 

} 

$person = new Person(); 
$person->save("nameX", "last nameX"); 
$person->save("nameY", "last nameY"); 
$person->show(); 
?> 

Answer 1

其範圍界定問題，也可以作爲您將要覆蓋陣列以及

<?php 

class Person{ 
    // define the property as an array 
    public $names = []; 


    public function save($name, $lastName){ 
     // use $this to access the property 
     // also use [] as you call this more than once 

     $this->names[] = ["name" => $name,"lastname" => $lastName]; 
    } 

    public function show(){ 
     // foreach over outer array 
     foreach($this->names as $name){ 
      // echo from the inner array 
      echo $name['name'] . ' ' . $name['lastname']; 
     } 
    } 

} 

$person = new Person(); 
$person->save("nameX", "last nameX"); 
$person->save("nameY", "last nameY"); 
$person->show(); 
?>