PHP - 数组错误输出（需要函数帮助）

Question

在这个函数的输出中（最后）你可以看到产品被放置在每个子数组中。我想通过一个参数在需要添加产品的地方传递函数。该参数将是不同页面上的变量：如果变量的值为“meal2”=>产品只需要添加到数组“meal2”下。

function addToMeal() { 

    $xmaaltijden = $_SESSION['xmaaltijden']; 
    $i=1; 

    while ($i <= $xmaaltijden) { 

     $schemas = array('maaltijd' . $i); 
     $i++; 


    $producten = $_SESSION['products']; 

    foreach ($schemas as $key => $schema){ 
     foreach ($producten as $k => $product){ 

      $variables[$schema][] = $product; 
    }; 
}; 
}; 

echo '<pre>' . print_r($variables,1) . '</pre>'; 
} 

输出：

Array 
(
    [meal1] => Array 
     (
      [0] => 1 
      [1] => 3 
      [2] => 2 
      [3] => 9 
     ) 

    [meal2] => Array 
     (
      [0] => 1 
      [1] => 3 
      [2] => 2 
      [3] => 9 
     ) 

    [meal3] => Array 
     (
      [0] => 1 
      [1] => 3 
      [2] => 2 
      [3] => 9 
     ) 

) 

Answer 1

不：

foreach ($schemas as $key => $schema){ 
     foreach ($producten as $k => $product){ 

      $variables[$schema][] = $product; 
    }; 

但是：

$yourVar = 'meal2'; 
foreach ($schemas as $key => $schema){ 
    if ($schema === $yourVar) { 
     $variables[$schema] = $producten; 
    } else { 
     $variables[$schema] = array(); 
    } 
}