文件上传demo

前端代码:

<form action="upload.php" enctype="multipart/form-data" method="post">
    上传文件<input type="file" name="myfile"/>
    <input type="submit" value="上传"/>
</form>  

　　

后端代码:

$upload_path = dirname(__FILE__).'/upload/';

//var_dump($_FILES);exit;
if(!is_dir($upload_path)) {
    mkdir($upload_path);
}

$file_type = get_ext($_FILES['myfile']['name']);
echo $file_type;
if($file_type!="xls" && $file_type!='xlsx') {
    echo "只支持excel导入";
    exit();
}
//判断是否上传成功（是否使用post方式上传）
if(is_uploaded_file($_FILES['myfile']['tmp_name'])) {
    //把文件转存到你希望的目录（不要使用copy函数）
    $uploaded_file=$_FILES['myfile']['tmp_name'];

    //$move_to_file=$user_path."/".$_FILES['myfile']['name'];
    $file_true_name=$_FILES['myfile']['name'];
    $move_to_file = $upload_path."/".time().rand(1,1000).$file_type;
    //echo "$uploaded_file   $move_to_file";
    if(move_uploaded_file($uploaded_file,iconv("utf-8","gb2312",$move_to_file))) {
        echo $_FILES['myfile']['name']."上传成功";
    } else {
        echo "上传失败";
    }
} else {
    echo "上传失败";
}

function get_ext($file_name){
    $build_file_arr = explode('.', $file_name);
    return array_pop($build_file_arr);
}