PHP foreach在靜態函數中

Question

我在static函數中有一個foreach循環。但由於某種原因，它只能做一個循環。我究竟做錯了什麼？

static function printall(){ 
    foreach (self::$products as $product){ 
     return print_r($product); 
    } 
} 

這給了我：

Array 
(
    [0] => 700152 
    [1] => 21.0000 
    [2] => 5.2000 
    [3] => 24.7900 
) 

但是，當我print_r的自我:: $產品我得到這個：

Array 
(
    [0] => Array 
     (
      [0] => 700152 
      [1] => 21.0000 
      [2] => 5.2000 
      [3] => 24.7900 
     ) 

    [1] => Array 
     (
      [0] => 700000 
      [1] => 21.0000 
      [2] => 3.4700 
      [3] => 16.5200 
     ) 

    [2] => Array 
     (
      [0] => 705300 
      [1] => 21.0000 
      [2] => 1.3900 
      [3] => 6.6100 
     )  
) 

Answer 1

的return聲明返回值終止功能，所以循環只運行一次迭代。只要放下它，你應該沒問題：

static function printall(){ 
    foreach (self::$products as $product){ 
     print_r($product); 
    } 
}