如果它在assoc数组中缺失，填充数组值？

Question

如果它在assoc数组中缺失，填充数组值？ 我有一个：在A [ “A2”]大小比A [ “A1”]大

$A= array("A1"=>array("a"=>1,"b"=>2,"d"=>3), 
      "A2"=>array("a"=>4,"b"=>3,"c"=>2,"d"=>1) 
     ); 

基地 我希望得到新的$ A这个样子

$A= array("A1"=>array("a"=>1,"b"=>2,"c"=>"0.00","d"=>3), 
      "A2"=>array("a"=>4,"b"=>3,"c"=>2,"d"=>1) 
     ); 

Answer 1

我'd这样做：

if (count($A['A2']) > count($A['A1'])){ 
    foreach($A['A2'] as $key => $value){ 
     if (!array_key_exists($key, $A['A1'])){ 
      $A['A1'][$key] = '0.00'; 
     } 
    } 
}