php上传文件

<form action="upload_file.php" method="post" enctype="multipart/form-data"> ???<label for="file">文件名：</label> ???<input type="file" name="file" id="file"><br> ???<input type="submit" name="submit" value="提交"></form>

<?php// 允许上传的图片后缀$allowedExts = array("gif", "jpeg", "jpg", "png");$temp = explode(".", $_FILES["file"]["name"]);echo $_FILES["file"]["size"];$extension = end($temp); ????// 获取文件后缀名if ((($_FILES["file"]["type"] == "image/gif")|| ($_FILES["file"]["type"] == "image/jpeg")|| ($_FILES["file"]["type"] == "image/jpg")|| ($_FILES["file"]["type"] == "image/pjpeg")|| ($_FILES["file"]["type"] == "image/x-png")|| ($_FILES["file"]["type"] == "image/png"))&& ($_FILES["file"]["size"] < 204800) ??// 小于 200 kb&& in_array($extension, $allowedExts)){ ???if ($_FILES["file"]["error"] > 0) ???{ ???????echo "err"; ???} ???else ???{ ???????echo "上传文件名: " . $_FILES["file"]["name"] . "<br>"; ???????echo "文件类型: " . $_FILES["file"]["type"] . "<br>"; ???????echo "文件大小: " . ($_FILES["file"]["size"] / 1024) . " kB<br>"; ???????echo "文件临时存储的位置: " . $_FILES["file"]["tmp_name"] . "<br>"; ???????????????// 判断当期目录下的 upload 目录是否存在该文件 ???????// 如果没有 upload 目录，你需要创建它，upload 目录权限为 777 ???????if (file_exists("../../../Content/UploadFiles/00/00/00/" . $_FILES["file"]["name"])) ???????{ ???????????echo "err"; ???????} ???????else ???????{ ???????????// 如果 upload 目录不存在该文件则将文件上传到 upload 目录下 ???????????move_uploaded_file($_FILES["file"]["tmp_name"], "../../../Content/UploadFiles/00/00/00/" . $_FILES["file"]["name"]); ???????} ???}}else{ ???echo "err";}?>