多個文件輸入想要替換第一個與第二

Question

內容我有以下文件上傳

<input type="file" name="files2[]" multiple onchange="readURL(this);" size="1" class="input-file" /> 

我需要以某種方式替換文件[]與files2 []當files2是組。

這裏是（文件/文件）中的內容：

Array ([files] => Array ([name] => Array ([0] =>c GIF.gif) [type] => Array ([0] => image/gif) [tmp_name] => Array ([0] => C:\Windows\Temp\phpF943.tmp) [error] => Array ([0] => 0) [size] => Array ([0] => 9921)) [files2] => Array ([name] => Array ([0] => 14 beresford.png [1] => combination-boilerc2.jpg) [type] => Array ([0] => image/png [1] => image/jpeg) [tmp_name] => Array ([0] => C:\Windows\Temp\phpF944.tmp [1] => C:\Windows\Temp\phpF955.tmp) [error] => Array ([0] => 0 [1] => 0 

我曾嘗試下面的條件，但是這似乎並沒有得到滿足

if (!empty($_FILES['files2']['error'][0])) { 

$_FILES['files']=$_FILES['files2']; 

} 

如果我改變了對下面的條件總是滿足，導致文件[]的內容也是空的。

if (!empty($_FILES['files2'])) { //this is always reached even if files 2 is empty... 

    $_FILES['files']=$_FILES['files2']; 

    } 

Array ([files] => Array ([name] => Array ([0] =>) [type] => Array ([0] =>) [tmp_name] => Array ([0] =>) [error] => Array ([0] => 4) [size] => Array ([0] => 0)) [files2] => Array ([name] => Array ([0] =>) [type] => Array ([0] =>) [tmp_name] => Array ([0] =>) [error] => Array ([0] => 4) [size] => Array ([0] => 0))) 0 is an Invalid file type: 

*註文件和files2是混亂的名字輸入，清楚地意識到這一點;）

Answer 1

以下似乎工作：

如果

if (!empty($_FILES['files2']['name'][0])) { 

    $_FILES['files']=$_FILES['files2']; 

    } 

不知道有更好的辦法去檢查。