相关疑难解决方法(0)

无论如何要通过<input type="file" />元素限制文件类型的选择？

例如,如果我只想上传图像类型,我会将可能的选择限制为(image/jpg,image/gif,image/png),选择对话框会使其他mime类型的文件变灰.

ps我知道我可以通过扫描.type属性在File API之后执行此操作.我真的试图限制这一点..我也知道我可以通过闪存做到这一点,但我不想为此使用闪存.

我有以下代码来检查(上传的简历和推荐信是否符合所需类型(pdf或doc或docx)和大小(小于400 kb)

//check file extension and size
         $resume= ($_FILES['resume']['name']); 
         $reference= ($_FILES['reference']['name']); 
         $ext = strrchr($resume, ".");
         $ext1 = strrchr($reference, ".");
        if (!(($_FILES["resume"]["type"] == "application/doc")
        || ($_FILES["resume"]["type"] == "application/docx")
        || ($_FILES["resume"]["type"] == "application/pdf" ))
         && (($_FILES["reference"]["type"] == "application/doc")
        || ($_FILES["reference"]["type"] == "application/docx")
        || ($_FILES["reference"]["type"] == "application/pdf"))
        && (($ext == ".pdf") || ($ext == ".doc") || ($ext == ".docx"))
        && (($ext1 == ".pdf") || ($ext1 == ".doc") || ($ext1 == ".docx"))
        &&  ($_FILES["resume"]["size"] < 400000) //accept upto 500 kb
        &&  ($_FILES["reference"]["size"] < 400000)) …