PHP通用文件上传类的具体解析_PHP教程-php教程-PHP中文网

我们下面为大家具体讲解举例来说：用户可上传一种展品并可为该展品上传一张缩略图，那么缩略图文件限制类型可能为jpg,，gif，png等，而展品文件限制类型可能为mov,avi,mpeg等，而图片大小可能限制为100kb，音频视频大小可能限制为2mb。类代码如下：

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<OL class=dp-xml><LI class=alt><SPAN><SPAN>class Upload  </SPAN></SPAN><LI class=""><SPAN>{  </SPAN><LI class=alt><SPAN>    public $InputName;    // 文件上传域控件名  </SPAN><LI class=""><SPAN>      </SPAN><LI class=alt><SPAN>    /**    </SPAN><LI class=""><SPAN>    * 允许上传的文件类型  </SPAN><LI class=alt><SPAN>    * 形式为 array('image/jpeg', 'image/png', 'image/gif') 或包含此类数组的数组（与每个上传域控件对应）  </SPAN><LI class=""><SPAN>    */  </SPAN><LI class=alt><SPAN>    public $FileType;  </SPAN><LI class=""><SPAN>      </SPAN><LI class=alt><SPAN>    /**    </SPAN><LI class=""><SPAN>    * 最大上传文件大小（单位：byte）  </SPAN><LI class=alt><SPAN>    * 形式为 array('image' =</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN> $size, 'audio' =</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN> $size)（表示每种应用文件类型所对应的上传大小） 或包含此类数组的数组（与每个上传域控件对应）或一数值（表示所有上传文件均限制在此大小之下）  </SPAN></SPAN><LI class=""><SPAN>    */  </SPAN><LI class=alt><SPAN>    public $FileMaxSize;   </SPAN><LI class=""><SPAN>      </SPAN><LI class=alt><SPAN>    public $FileSavePath;  // 文件保存路径（可为数组形式，表示不同上传域上传文件到不同的路径）  </SPAN><LI class=""><SPAN>    public $FileSaveName;  // 文件保存名（不包含后缀名）（可为数组形式，表示不同上传域上传文件保存的不同名称）  </SPAN><LI class=alt><SPAN>    public $NoteFileFalse; // 文件错误提示  </SPAN><LI class=""><SPAN>    public $NoteFileType;  // 文件类型不符提示  </SPAN><LI class=alt><SPAN>    public $NoteFileSize;  // 文件大小超出提示  </SPAN><LI class=""><SPAN>      </SPAN><LI class=alt><SPAN>    /* 上传文件并返回文件名信息（包含后缀名） */  </SPAN><LI class=""><SPAN>    public function UploadFile()  </SPAN><LI class=alt><SPAN>    {  </SPAN><LI class=""><SPAN>        $this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>CheckFile(); // 检验文件  </SPAN></SPAN><LI class=alt><SPAN>        $</SPAN><SPAN class=attribute><FONT color=#ff0000>file</FONT></SPAN><SPAN> = $_FILES[$this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>InputName];  </SPAN></SPAN><LI class=""><SPAN>        $</SPAN><SPAN class=attribute><FONT color=#ff0000>file_save_full_name</FONT></SPAN><SPAN> = </SPAN><SPAN class=attribute-value><FONT color=#0000ff>array</FONT></SPAN><SPAN>(); // 文件保存名（包含后缀名）  </SPAN></SPAN><LI class=alt><SPAN>          </SPAN><LI class=""><SPAN>        foreach ($file['name'] as $</SPAN><SPAN class=attribute><FONT color=#ff0000>key</FONT></SPAN><SPAN> =</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN> $name)  </SPAN></SPAN><LI class=alt><SPAN>        {  </SPAN><LI class=""><SPAN>            if (!empty($name)) // 文件不为空  </SPAN><LI class=alt><SPAN>            {  </SPAN><LI class=""><SPAN>                /* 确定文件保存路径 */  </SPAN><LI class=alt><SPAN>                if (is_array($this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>FileSavePath))  </SPAN></SPAN><LI class=""><SPAN>                {  </SPAN><LI class=alt><SPAN>                    $</SPAN><SPAN class=attribute><FONT color=#ff0000>file_save_path</FONT></SPAN><SPAN> = $this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>FileSavePath[$key];  </SPAN></SPAN><LI class=""><SPAN>                }  </SPAN><LI class=alt><SPAN>                else   </SPAN><LI class=""><SPAN>                {  </SPAN><LI class=alt><SPAN>                    $</SPAN><SPAN class=attribute><FONT color=#ff0000>file_save_path</FONT></SPAN><SPAN> = $this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>FileSavePath;  </SPAN></SPAN><LI class=""><SPAN>                }  </SPAN><LI class=alt><SPAN>                  </SPAN><LI class=""><SPAN>                /* 确定文件保存名（不包含后缀名） */  </SPAN><LI class=alt><SPAN>                if (is_array($this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>FileSaveName))  </SPAN></SPAN><LI class=""><SPAN>                {  </SPAN><LI class=alt><SPAN>                    $</SPAN><SPAN class=attribute><FONT color=#ff0000>file_save_name</FONT></SPAN><SPAN> = $this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>FileSaveName[$key];  </SPAN></SPAN><LI class=""><SPAN>                }  </SPAN><LI class=alt><SPAN>                else   </SPAN><LI class=""><SPAN>                {  </SPAN><LI class=alt><SPAN>                    $</SPAN><SPAN class=attribute><FONT color=#ff0000>file_save_name</FONT></SPAN><SPAN> = $this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>FileSaveName;  </SPAN></SPAN><LI class=""><SPAN>                }  </SPAN><LI class=alt><SPAN>                  </SPAN><LI class=""><SPAN>                /* 开始保存 */  </SPAN><LI class=alt><SPAN>                $this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>CreatePath($file_save_path); // 如果路径不存在则创建路径  </SPAN></SPAN><LI class=""><SPAN>                move_uploaded_file($file["tmp_name"][$key], $file_save_path . $file_save_name . $this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>GetSuffix($file['name'][$key]));  </SPAN></SPAN><LI class=alt><SPAN>                $file_save_full_name[] = $file_save_name . $this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>GetSuffix($file['name'][$key]);  </SPAN></SPAN><LI class=""><SPAN>            }  </SPAN><LI class=alt><SPAN>            else   </SPAN><LI class=""><SPAN>            {  </SPAN><LI class=alt><SPAN>                $file_save_full_name[] = null;  </SPAN><LI class=""><SPAN>            }  </SPAN><LI class=alt><SPAN>        }  </SPAN><LI class=""><SPAN>          </SPAN><LI class=alt><SPAN>        unlink($file);  </SPAN><LI class=""><SPAN>          </SPAN><LI class=alt><SPAN>        /* 如果只有一个文件，则返回单个文件名 */  </SPAN><LI class=""><SPAN>        if (count($file_save_full_name) == 1)  </SPAN><LI class=alt><SPAN>        {  </SPAN><LI class=""><SPAN>            $</SPAN><SPAN class=attribute><FONT color=#ff0000>file_save_full_name</FONT></SPAN><SPAN> = $file_save_full_name[0];  </SPAN></SPAN><LI class=alt><SPAN>        }  </SPAN><LI class=""><SPAN>          </SPAN><LI class=alt><SPAN>        return $file_save_full_name;  </SPAN><LI class=""><SPAN>    }  </SPAN><LI class=alt><SPAN>      </SPAN><LI class=""><SPAN>    /* 检验文件 */  </SPAN><LI class=alt><SPAN>    private function CheckFile()  </SPAN><LI class=""><SPAN>    {  </SPAN><LI class=alt><SPAN>        $</SPAN><SPAN class=attribute><FONT color=#ff0000>file</FONT></SPAN><SPAN> = $_FILES[$this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>InputName];  </SPAN></SPAN><LI class=""><SPAN>          </SPAN><LI class=alt><SPAN>        foreach ($file['name'] as $</SPAN><SPAN class=attribute><FONT color=#ff0000>key</FONT></SPAN><SPAN> =</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN> $name)  </SPAN></SPAN><LI class=""><SPAN>        {  </SPAN><LI class=alt><SPAN>            if (!empty($name)) // 文件不为空  </SPAN><LI class=""><SPAN>            {  </SPAN><LI class=alt><SPAN>                $</SPAN><SPAN class=attribute><FONT color=#ff0000>type</FONT></SPAN><SPAN>  = $file['type'][$key];  </SPAN></SPAN><LI class=""><SPAN>                $</SPAN><SPAN class=attribute><FONT color=#ff0000>size</FONT></SPAN><SPAN>  = $file['size'][$key];  </SPAN></SPAN><LI class=alt><SPAN>                $</SPAN><SPAN class=attribute><FONT color=#ff0000>error</FONT></SPAN><SPAN> = $file['error'][$key];  </SPAN></SPAN><LI class=""><SPAN>                  </SPAN><LI class=alt><SPAN>                /* 确定允许上传文件类型列表 */  </SPAN><LI class=""><SPAN>                if (is_array($this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>FileType[0]))  </SPAN></SPAN><LI class=alt><SPAN>                {  </SPAN><LI class=""><SPAN>                    $</SPAN><SPAN class=attribute><FONT color=#ff0000>file_type</FONT></SPAN><SPAN> = $this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>FileType[$key];  </SPAN></SPAN><LI class=alt><SPAN>                }  </SPAN><LI class=""><SPAN>                else   </SPAN><LI class=alt><SPAN>                {  </SPAN><LI class=""><SPAN>                    $</SPAN><SPAN class=attribute><FONT color=#ff0000>file_type</FONT></SPAN><SPAN> = $this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>FileType;  </SPAN></SPAN><LI class=alt><SPAN>                }  </SPAN><LI class=""><SPAN>                  </SPAN><LI class=alt><SPAN>                /* 确定最大上传文件大小 */  </SPAN><LI class=""><SPAN>                if (is_array($this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>FileMaxSize))  </SPAN></SPAN><LI class=alt><SPAN>                {  </SPAN><LI class=""><SPAN>                    $</SPAN><SPAN class=attribute><FONT color=#ff0000>file_max_size_key</FONT></SPAN><SPAN> = </SPAN><SPAN class=attribute-value><FONT color=#0000ff>explode</FONT></SPAN><SPAN>('/', $type);  </SPAN></SPAN><LI class=alt><SPAN>                    $</SPAN><SPAN class=attribute><FONT color=#ff0000>file_max_size_key</FONT></SPAN><SPAN> = $file_max_size_key[0];  </SPAN></SPAN><LI class=""><SPAN>                    if (is_array($this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>FileMaxSize[0]))  </SPAN></SPAN><LI class=alt><SPAN>                    {  </SPAN><LI class=""><SPAN>                        $</SPAN><SPAN class=attribute><FONT color=#ff0000>file_max_size</FONT></SPAN><SPAN> = $this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>FileMaxSize[$key][$file_max_size_key];  </SPAN></SPAN><LI class=alt><SPAN>                    }  </SPAN><LI class=""><SPAN>                    else   </SPAN><LI class=alt><SPAN>                    {  </SPAN><LI class=""><SPAN>                        $</SPAN><SPAN class=attribute><FONT color=#ff0000>file_max_size</FONT></SPAN><SPAN> = $this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>FileMaxSize[$file_max_size_key];  </SPAN></SPAN><LI class=alt><SPAN>                    }  </SPAN><LI class=""><SPAN>                }  </SPAN><LI class=alt><SPAN>                else   </SPAN><LI class=""><SPAN>                {  </SPAN><LI class=alt><SPAN>                    $</SPAN><SPAN class=attribute><FONT color=#ff0000>file_max_size</FONT></SPAN><SPAN> = $this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>FileMaxSize;  </SPAN></SPAN><LI class=""><SPAN>                }  </SPAN><LI class=alt><SPAN>                  </SPAN><LI class=""><SPAN>                /* 文件错误 */  </SPAN><LI class=alt><SPAN>                if ($error </SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN> 0)  </SPAN></SPAN><LI class=""><SPAN>                {  </SPAN><LI class=alt><SPAN>                    die($name . $this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>NoteFileFalse);  </SPAN></SPAN><LI class=""><SPAN>                }  </SPAN><LI class=alt><SPAN>                  </SPAN><LI class=""><SPAN>                /* 文件大小超过最大上传文件大小 */  </SPAN><LI class=alt><SPAN>                if ((!is_null($file_max_size) && $size </SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN> $file_max_size) || ($</SPAN><SPAN class=attribute><FONT color=#ff0000>size</FONT></SPAN><SPAN> == 0))  </SPAN></SPAN><LI class=""><SPAN>                {  </SPAN><LI class=alt><SPAN>                    die($name . $this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>NoteFileSize);  </SPAN></SPAN><LI class=""><SPAN>                }  </SPAN><LI class=alt><SPAN> </SPAN><LI class=""><SPAN>                    /* 文件类型不符 */  </SPAN><LI class=alt><SPAN>                if (!in_array($type, $file_type))  </SPAN><LI class=""><SPAN>                {  </SPAN><LI class=alt><SPAN>                    die($name . $this-</SPAN><SPAN class=tag><STRONG><FONT color=#006699>></FONT></STRONG></SPAN><SPAN>NoteFileType);  </SPAN></SPAN><LI class=""><SPAN>                }  </SPAN><LI class=alt><SPAN>            }  </SPAN><LI class=""><SPAN>        }  </SPAN><LI class=alt><SPAN>    }  </SPAN><LI class=""><SPAN>      </SPAN><LI class=alt><SPAN>    /* 获取文件后缀名 */  </SPAN><LI class=""><SPAN>    private function GetSuffix($fileName)  </SPAN><LI class=alt><SPAN>    {  </SPAN><LI class=""><SPAN>        return substr($fileName, strrpos($fileName, "."));  </SPAN><LI class=alt><SPAN>    }  </SPAN><LI class=""><SPAN> </SPAN><LI class=alt><SPAN>    /* 如果路径不存在则创建路径 */  </SPAN><LI class=""><SPAN>    private function CreatePath($filePath)  </SPAN><LI class=alt><SPAN>    {  </SPAN><LI class=""><SPAN>        if (!file_exists($filePath))  </SPAN><LI class=alt><SPAN>        {  </SPAN><LI class=""><SPAN>            mkdir($filePath);  </SPAN><LI class=alt><SPAN>        }  </SPAN><LI class=""><SPAN>    }  </SPAN><LI class=alt><SPAN>} </SPAN></LI></OL>

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PHP通用文件上传类的使用方法：接着以本文开头所举例子来说明该类的调用方法（呵呵，调用是很方便的）：

$upload_obj = new Upload(); // 文件上传对象

$upload_obj->InputName = 'upload_test'; // 文件上传域控件名

$upload_obj->FileType = array(array('image/jpeg', 'image/png'), array('audio/mpeg', 'video/x-msvideo')); // 允许上传的文件类型

$upload_obj->FileMaxSize = array('image' => 100 * 1024, 'audio' => 2 * 1024 * 1024, 'video' => 2 * 1024 * 1024);

$upload_obj->FileSavePath = array('upload/files/s/', 'upload/files/z/');

$upload_obj->FileSaveName = time();

$upload_obj->NoteFileFalse = '文件错误';

$upload_obj->NoteFileType = '文件类型不符';

$upload_obj->NoteFileSize = '文件大小超出';

$file_save_full_name = $upload_obj->UploadFile(); // 上传并获取文件全名（基本名加扩展名）（如果是多个文件则为数组形式）（全名用于在数据库中存储信息）