PHP通用文件上传类的具体解析-php手册-php.cn

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：
<ol class="dp-xml">
<li class="alt"><span><span>class Upload  </span></span></li>
<li class=""><span>{  </span></li>
<li class="alt"><span>    public $InputName;    // 文件上传域控件名  </span></li>
<li class=""><span>      </span></li>
<li class="alt"><span>    /**    </span></li>
<li class=""><span>    * 允许上传的文件类型  </span></li>
<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>
<li class=""><span>    */  </span></li>
<li class="alt"><span>    public $FileType;  </span></li>
<li class=""><span>      </span></li>
<li class="alt"><span>    /**    </span></li>
<li class=""><span>    * 最大上传文件大小（单位：byte）  </span></li>
<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>
</li>
<li class=""><span>    */  </span></li>
<li class="alt"><span>    public $FileMaxSize;   </span></li>
<li class=""><span>      </span></li>
<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>
<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>
<li class="alt"><span>    public $NoteFileFalse; // 文件错误提示  </span></li>
<li class=""><span>    public $NoteFileType;  // 文件类型不符提示  </span></li>
<li class="alt"><span>    public $NoteFileSize;  // 文件大小超出提示  </span></li>
<li class=""><span>      </span></li>
<li class="alt"><span>    /* 上传文件并返回文件名信息（包含后缀名） */  </span></li>
<li class=""><span>    public function UploadFile()  </span></li>
<li class="alt"><span>    {  </span></li>
<li class="">
<span>        $this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>CheckFile(); // 检验文件  </span>
</li>
<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>
</li>
<li class="">
<span>        $</span><span class="attribute"><font color="#ff0000">file_save_full_name</font></span><span> = </span><span class="attribute-value"><font color="#0000ff">array</font></span><span>(); // 文件保存名（包含后缀名）  </span>
</li>
<li class="alt"><span>          </span></li>
<li class="">
<span>        foreach ($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> $name)  </span>
</li>
<li class="alt"><span>        {  </span></li>
<li class=""><span>            if (!empty($name)) // 文件不为空  </span></li>
<li class="alt"><span>            {  </span></li>
<li class=""><span>                /* 确定文件保存路径 */  </span></li>
<li class="alt">
<span>                if (is_array($this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>FileSavePath))  </span>
</li>
<li class=""><span>                {  </span></li>
<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>
</li>
<li class=""><span>                }  </span></li>
<li class="alt"><span>                else   </span></li>
<li class=""><span>                {  </span></li>
<li class="alt">
<span>                    $</span><span class="attribute"><font color="#ff0000">file_save_path</font></span><span> = $this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>FileSavePath;  </span>
</li>
<li class=""><span>                }  </span></li>
<li class="alt"><span>                  </span></li>
<li class=""><span>                /* 确定文件保存名（不包含后缀名） */  </span></li>
<li class="alt">
<span>                if (is_array($this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>FileSaveName))  </span>
</li>
<li class=""><span>                {  </span></li>
<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>
</li>
<li class=""><span>                }  </span></li>
<li class="alt"><span>                else   </span></li>
<li class=""><span>                {  </span></li>
<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>
</li>
<li class=""><span>                }  </span></li>
<li class="alt"><span>                  </span></li>
<li class=""><span>                /* 开始保存 */  </span></li>
<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>
</li>
<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>
</li>
<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>
</li>
<li class=""><span>            }  </span></li>
<li class="alt"><span>            else   </span></li>
<li class=""><span>            {  </span></li>
<li class="alt"><span>                $file_save_full_name[] = null;  </span></li>
<li class=""><span>            }  </span></li>
<li class="alt"><span>        }  </span></li>
<li class=""><span>          </span></li>
<li class="alt"><span>        unlink($file);  </span></li>
<li class=""><span>          </span></li>
<li class="alt"><span>        /* 如果只有一个文件，则返回单个文件名 */  </span></li>
<li class=""><span>        if (count($file_save_full_name) == 1)  </span></li>
<li class="alt"><span>        {  </span></li>
<li class="">
<span>            $</span><span class="attribute"><font color="#ff0000">file_save_full_name</font></span><span> = $file_save_full_name[0];  </span>
</li>
<li class="alt"><span>        }  </span></li>
<li class=""><span>          </span></li>
<li class="alt"><span>        return $file_save_full_name;  </span></li>
<li class=""><span>    }  </span></li>
<li class="alt"><span>      </span></li>
<li class=""><span>    /* 检验文件 */  </span></li>
<li class="alt"><span>    private function CheckFile()  </span></li>
<li class=""><span>    {  </span></li>
<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>
</li>
<li class=""><span>          </span></li>
<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> $name)  </span>
</li>
<li class=""><span>        {  </span></li>
<li class="alt"><span>            if (!empty($name)) // 文件不为空  </span></li>
<li class=""><span>            {  </span></li>
<li class="alt">
<span>                $</span><span class="attribute"><font color="#ff0000">type</font></span><span>  = $file['type'][$key];  </span>
</li>
<li class="">
<span>                $</span><span class="attribute"><font color="#ff0000">size</font></span><span>  = $file['size'][$key];  </span>
</li>
<li class="alt">
<span>                $</span><span class="attribute"><font color="#ff0000">error</font></span><span> = $file['error'][$key];  </span>
</li>
<li class=""><span>                  </span></li>
<li class="alt"><span>                /* 确定允许上传文件类型列表 */  </span></li>
<li class="">
<span>                if (is_array($this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>FileType[0]))  </span>
</li>
<li class="alt"><span>                {  </span></li>
<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>
</li>
<li class="alt"><span>                }  </span></li>
<li class=""><span>                else   </span></li>
<li class="alt"><span>                {  </span></li>
<li class="">
<span>                    $</span><span class="attribute"><font color="#ff0000">file_type</font></span><span> = $this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>FileType;  </span>
</li>
<li class="alt"><span>                }  </span></li>
<li class=""><span>                  </span></li>
<li class="alt"><span>                /* 确定最大上传文件大小 */  </span></li>
<li class="">
<span>                if (is_array($this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>FileMaxSize))  </span>
</li>
<li class="alt"><span>                {  </span></li>
<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>
</li>
<li class="alt">
<span>                    $</span><span class="attribute"><font color="#ff0000">file_max_size_key</font></span><span> = $file_max_size_key[0];  </span>
</li>
<li class="">
<span>                    if (is_array($this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>FileMaxSize[0]))  </span>
</li>
<li class="alt"><span>                    {  </span></li>
<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>
</li>
<li class="alt"><span>                    }  </span></li>
<li class=""><span>                    else   </span></li>
<li class="alt"><span>                    {  </span></li>
<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>
</li>
<li class="alt"><span>                    }  </span></li>
<li class=""><span>                }  </span></li>
<li class="alt"><span>                else   </span></li>
<li class=""><span>                {  </span></li>
<li class="alt">
<span>                    $</span><span class="attribute"><font color="#ff0000">file_max_size</font></span><span> = $this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>FileMaxSize;  </span>
</li>
<li class=""><span>                }  </span></li>
<li class="alt"><span>                  </span></li>
<li class=""><span>                /* 文件错误 */  </span></li>
<li class="alt">
<span>                if ($error </span><span class="tag"><strong><font color="#006699">></font></strong></span><span> 0)  </span>
</li>
<li class=""><span>                {  </span></li>
<li class="alt">
<span>                    die($name . $this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>NoteFileFalse);  </span>
</li>
<li class=""><span>                }  </span></li>
<li class="alt"><span>                  </span></li>
<li class=""><span>                /* 文件大小超过最大上传文件大小 */  </span></li>
<li class="alt">
<span>                if ((!is_null($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>
</li>
<li class=""><span>                {  </span></li>
<li class="alt">
<span>                    die($name . $this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>NoteFileSize);  </span>
</li>
<li class=""><span>                }  </span></li>
<li class="alt"><span> </span></li>
<li class=""><span>                    /* 文件类型不符 */  </span></li>
<li class="alt"><span>                if (!in_array($type, $file_type))  </span></li>
<li class=""><span>                {  </span></li>
<li class="alt">
<span>                    die($name . $this-</span><span class="tag"><strong><font color="#006699">></font></strong></span><span>NoteFileType);  </span>
</li>
<li class=""><span>                }  </span></li>
<li class="alt"><span>            }  </span></li>
<li class=""><span>        }  </span></li>
<li class="alt"><span>    }  </span></li>
<li class=""><span>      </span></li>
<li class="alt"><span>    /* 获取文件后缀名 */  </span></li>
<li class=""><span>    private function GetSuffix($fileName)  </span></li>
<li class="alt"><span>    {  </span></li>
<li class=""><span>        return substr($fileName, strrpos($fileName, "."));  </span></li>
<li class="alt"><span>    }  </span></li>
<li class=""><span> </span></li>
<li class="alt"><span>    /* 如果路径不存在则创建路径 */  </span></li>
<li class=""><span>    private function CreatePath($filePath)  </span></li>
<li class="alt"><span>    {  </span></li>
<li class=""><span>        if (!file_exists($filePath))  </span></li>
<li class="alt"><span>        {  </span></li>
<li class=""><span>            mkdir($filePath);  </span></li>
<li class="alt"><span>        }  </span></li>
<li class=""><span>    }  </span></li>
<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）