从数组中的上传文件中删除空格

Question

我正在尝试从POST上传的文件中删除空格，因为这会给我带来问题，但是我无法让它工作。我在这里测试了这个片段，用下划线替换空格，然后将结果插入数据库fiels，但它只返回单词'Array'。我已经尝试了许多不同的方法，没有运气，主要是得到一个空白字段。我希望有人能帮忙指出我哪里出错了。

谢谢！

`

$count = $_POST['img_counter'];
    $rand = mt_rand(10000, 99999);
    for ($i = 0; $i <= count($_FILES['fileToUpload']['name']); $i++) {
        $path = './uploads/' . $rand;
        $temp = $_FILES['fileToUpload']['name']; // assigns file name to variable
        $newfilename = str_replace(' ', '_', $temp); // replaces blank space with underscore and saves as new variable

        if (!is_dir($path)) {
            mkdir($path, 0777, true);
            chmod($path, 0777);
        }
        $extension = pathinfo($_FILES['fileToUpload']['name'][$i], PATHINFO_EXTENSION);
        if (move_uploaded_file($_FILES['fileToUpload']['tmp_name'][$i], $path . '/' . count() . $i . $_FILES['fileToUpload']['name'][$i])) {
            $iCreatedAt = time();
            $iUpdatedAt = time();
            $iTokenNumber = $rand;
            $vImageName = $newfilename; // mysql field for image name
            chmod($path . '/' . count() . $i . $_FILES['fileToUpload']['name'][$i], 0777);
            $query = "insert into shop_images (iTokenNumber,vImageName,iUpdatedAt,iCreatedAt) values ('$iTokenNumber','" . $vImageName . "','$iCreatedAt','$iUpdatedAt')";
            if (!mysqli_query($conn, $query)) {
//                        echo mysqli_error();
                echo "Something went wrong!";
            } else {
                //echo "success";
            }
        } else {
            echo $_FILES['fileToUpload'][$i]['error'];
        }
    }

`