是什么array_udiff_assoc和array_diff_uassoc之间的差 [英] what is the difference between array_udiff_assoc and array_diff_uassoc

问题描述

是什么array_udiff_assoc和array_diff_uassoc

what is the difference between array_udiff_assoc and array_diff_uassoc

有关array_udiff_assoc我得到这个事情

for array_udiff_assoc i get this thing

<?php
 function myfunction($v1,$v2)
 {
 if ($v1===$v2)
   {
   return 0;
   }
 return 1;
 }
 $a1=array("a"=>"Cat","b"=>"Dog","c"=>"Horse");
 $a2=array("a"=>"Cat","b"=>"Horse","c"=>"Dog");
 print_r(array_udiff_assoc($a1,$a2,"myfunction"));
 ?>

结果

Array ( [b] Dog [c] => Horse )

也array_diff_uassoc

also array_diff_uassoc

  <?php
     function myfunction($v1,$v2)
     {
     if ($v1===$v2)
       {
       return 0;
       }
     return 1;
     }
     $a1=array("a"=>"Cat","b"=>"Dog","c"=>"Horse");
     $a2=array("a"=>"Cat","b"=>"Horse","c"=>"Dog");
     print_r(array_diff_uassoc($a1,$a2,"myfunction"));
     ?>

结果是一样的第一个

result is same as first one

Array ( [b] Dog [c] => Horse )

时的有什么区别，如果有那是什么。 PHP手册不说，他们是别名，因为他们常说。

Is the have any difference, if have what is that. Php manual does not says that they are alias, as they used to say.

推荐答案

他们都做同样的，但 udiff-assoc命令比较与用户提供的函数中的数据，而差异-uassoc 与用户提供的函数的指数比。

They both do the same, but udiff-assoc compares the DATA with the user supplied function, while diff-uassoc compares the INDEX with the user supplied function.

作为一个答案@lonsesomeday：由U， diff_assoc 将使用内部函数对所有的比较，而 udiff_uassoc 用途索引和数据比较提供的回调。

As an answer to @lonsesomeday : as indicated by the 'u', diff_assoc will use internal functions for all comparisons, and udiff_uassoc uses provided callbacks for index and data comparison.

http://www.php.net/manual/ EN / function.array的Diff-uassoc.php

http://www.php.net/manual/ EN / function.array-udiff-assoc.php

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