php upload pdf, doc, docx

我正在尝试将文件上传到我的服务器，允许的扩展名应该是pdf、doc、docx这是我的密码。

$uploadCv = $_FILES['uploadCv']['name'];
    $target = "includes/employeeCv/";
    $target = $target . basename($_FILES['uploadCv']['name']);
    if ($_FILES['uploadCv']['size'] == 0) {
        $error['uploadCvErr'] = "<span class='notAllowed'>Please upload your c.v</span>";
    } elseif
    (
        $_FILES['uploadCv']['type'] != 'application/pdf'
        && $_FILES['uploadCv']['type'] != 'application/msword'
        && $_FILES['uploadCv']['type'] != 'application/vnd.openxmlformats-officedocument.wordprocessingml.document'
    ) {
        $error['uploadCvErr'] = 'Unsupported file type uploaded.';
    } elseif ($_FILES['uploadCv']['size'] > 5000000) {
        $error['uploadCvErr'] = 'File uploaded exceeds maximum upload size.';
    }

PDF和doc一切正常，但在docx上显示Unsupported file type uploaded.

我在这里做错了什么。

编辑我已将此添加到我的检查文件中&& $_FILES['uploadCv']['type'] != 'application/zip'仍然不起作用。