PHP文件上传

html>
head>
    meta charset="utf-8">
    title>PHP测试title>
head>
body>

form action="index.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>

body>
html>

php
// 允许上传的图片后缀
$allowedExts = array("gif", "jpeg", "jpg", "png");
$temp = explode(".", $_FILES["file"]["name"]);
$extension = end($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"))
    && ($_FILES["file"]["size"] // 小于 200 kb
    && in_array($extension, $allowedExts))
{
    if ($_FILES["file"]["error"] > 0)
    {
        echo "错误：: " . $_FILES["file"]["error"] . "
";
    }
    else
    {
        echo "上传文件名: " . $_FILES["file"]["name"] . "
";
        echo "文件类型: " . $_FILES["file"]["type"] . "
";
        echo "文件大小: " . ($_FILES["file"]["size"] / 1024) . " kB
";
        echo "文件临时存储的位置: " . $_FILES["file"]["tmp_name"] . "
";

        // 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
        $pic_path = "./upload";
        if(!is_dir($pic_path)){
            mkdir(iconv("UTF-8", "GBK", $pic_path),0777,true);
        }

        if (file_exists("upload/" . $_FILES["file"]["name"]))
        {
            echo $_FILES["file"]["name"] . " 文件已经存在。 ";
        }
        else
        {
            // 如果 upload 目录不存在该文件则将文件上传到 upload 目录下
            move_uploaded_file($_FILES["file"]["tmp_name"], "upload/" . $_FILES["file"]["name"]);
            echo "文件存储在: " . "upload/" . $_FILES["file"]["name"];
        }
    }
}
else
{
    echo "非法的文件格式";
}