两个输入类型字段没有以一种形式提交而无法在php中找到错误

In one form two input fields are not submitting. I think it's php version 5.6 issue because it's working in php version 5.5, 5.4. and I am unable to find error.

HTML Code

<form action="quick-submit1.php" id="submission-form" method="post"    enctype="multipart/form-data">
    <input type="file" name="docs"/> 
    <input type="file" name="docsss"/> 
    <input type="submit" id="submit" value="Send File" name="submit">
</form>

After submit form (approx 5-7 min) it's showing this: