php 上傳文件

html表單，需要記住form的enctype屬性：

<form action=‘index.php‘ method="POST" enctype="multipart/form-data">
<input type=‘file‘ name=‘file‘ />
<input type=‘submit‘ value=‘提交‘ />
</form>

php代碼：

function uploadFile($fileInfo,$path=‘./upload/‘){
    //判斷錯誤號
    if($fileInfo[‘error‘] == UPLOAD_ERR_OK){
        
 
//文件是否是通過HTTP POST上傳的
        if(is_uploaded_file($fileInfo[‘tmp_name‘])){
            $ext = strtolower(pathinfo($fileInfo[‘name‘],PATHINFO_EXTENSION));
            $allow_Ext = array(‘jpg‘,‘jpeg‘,‘png‘);
            if(in_array($ext, $allow_Ext)){
                $length = 6;
                $newFileName
 
 = substr(md5(uniqid(microtime(true),true)),0,$length);
                $savePath = $path . $newFileName .‘.‘.$ext;
                if(move_uploaded_file($fileInfo[‘tmp_name‘], $savePath)){
                    return ‘success‘;
                }else{
                    return ‘file upload fail‘;
                }
            }
 
else{
                return ‘file type not allow‘;
            }
        }else{
            return ‘文件不是通過HTTP POST上傳的‘;
        }
    }else{
        switch($fileInfo[‘error‘]){
            case 1:
                $errMsg = ‘超出了配置文件的大小‘;//PHP.ini的upload_max_filesize的值
                break;
            case 2:
                $errMsg = ‘超過了表單允許接收數據的大小‘;//表單中MAX_FILE_SIZE的值
                break;
            case 3:
                $errMsg = ‘文件部分被上傳‘;
                break;
            case 4:
                $errMsg = ‘沒有文件被上傳‘;
                break;
            case 6:
                $errMsg = ‘找不到臨時文件夾‘;
                break;
            case 7:
                $errMsg = ‘文件寫入失敗‘;
                break;
            default: 
                $errMsg = "Unknown upload error"; 
                break;     
        }
        return $errMsg;
    }
}
//var_dump($_FILES);
if(isset($_FILES[‘file‘])){
   echo uploadFile($_FILES[‘file‘]);
}

php 上傳文件