Summarize three methods of php multi-file upload
Introducing three methods of multi- file upload. The first two are to directly traverse the three-dimensional super global array $_FILES. The last one is to first define a single file upload function and then call the function in a loop. Complete the upload of multiple files.
1.当多文件上传表单中多个上传文件的name属性为“pic[]”形式时, 也即表单为这种形式: <!--lang:html--> <form action="" method="post" enctype="multipart/form-data"> <input type="hidden" name="MAX_FILE_SIZE" value=""> <input type="file" name="pic[]" /><br><br> <input type="file" name="pic[]" /><br><br> <input type="file" name="pic[]" /><br><br> <input type="file" name="pic[]" /><br><br> <input type="submit" value="upload"/> </form> 可用foreach 循环 上传多个文件: //1.获取要上传文件的信息 $up_info=$_FILES['pic']; $ob_path="../system"; $typelist=array("image/gif","image/jpeg","image/pjpeg","image/png"); //定义运行的上传文件类型 for($i=0;$i<count($up_info['name']);$i++){ //foreach 循环处理多个文件上传 //2.判断文件是否上传错误 if($up_info['error'][$i]>0){ switch($up_info['error'][$i]){ case 1: $err_info="上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值"; break; case 2: $err_info="上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值"; break; case 3: $err_info="文件只有部分被上传"; break; case 4: $err_info="没有文件被上传"; break; case 6: $err_info="找不到临时文件夹"; break; case 7: $err_info="文件写入失败"; break; default: $err_info="未知的上传错误"; break; } continue($err_info); } //3.判断文件上传的类型是否合法 if(!in_array($up_info['type'][$i],$typelist)){ continue('文件类型错误!'.$up_info['type'][$i]); } //4.上传文件的大小过滤 if($up_info['size'][$i]>1000000){ continue('文件大小超过1000000'); } //5.上传文件名处理 $exten_name=pathinfo($up_info['name'][$i],PATHINFO_EXTENSION); do{ $main_name=date('YmHis'.'--'.rand(100,999)); $new_name=$main_name.'.'.$exten_name; }while(file_exists($to_path.'/'.$new_name)); //6.判断是否是上传的文件,并执行上传 if(is_uploaded_file($up_info['tmp_name'][$i])){ if(move_uploaded_file($up_info['tmp_name'][$i],$ob_path.'/'.$new_name)){ echo '文件上传成功!'; }else{ echo '上传文件移动失败!'; } }else{ echo '文件不是上传的文件'; } } //for循环的括号 2.当多文件上传表单中多个上传文件的name属性为“pic,text,doc,pdf”形式时, 也即表单为这种形式: <form action="" method="post" enctype="multipart/form-data"> <input type="hidden" name="MAX_FILE_SIZE" value=""> <input type="file" name="pic" /><br><br> <input type="file" name="text" /><br><br> <input type="file" name="doc" /><br><br> <input type="file" name="pdf" /><br><br> <input type="submit" value="upload"/> </form> 也可用foreach 循环 上传多个文件: //1.获取要上传文件的信息 $up_info=$_FILES; $ob_path="..\system"; $typelist=array("image/gif","image/jpeg","image/pjpeg","image/png"); //定义运行的上传文件类型 foreach($up_info as $k_name=>$value){ //用foreach循环 处理多个文件的上传 //2.判断文件是否上传错误 if($up_info[$k_name]['error']>0){ switch($up_info['error'][$i]){ case 1: $err_info="上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值"; break; case 2: $err_info="上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值"; break; case 3: $err_info="文件只有部分被上传"; break; case 4: $err_info="没有文件被上传"; break; case 6: $err_info="找不到临时文件夹"; break; case 7: $err_info="文件写入失败"; break; default: $err_info="未知的上传错误"; break; } continue($err_info); } //3.判断文件上传的类型是否合法 if(!in_array($up_info[$k_name]['type'],$typelist)){ continue('文件类型错误!'.$up_info[$k_name]['type']); } //4.上传文件的大小过滤 if($up_info[$k_name]['size']>100000){ echo '文件大小超过**'; continue; } //5.上传文件名处理 $exten_name=pathinfo($up_info[$k_name]['name'],PATHINFO_EXTENSION); do{ $main_name=date('YmHis'.'--'.rand(100,999)); $new_name=$main_name.'.'.$exten_name; }while(file_exists($to_path.'/'.$new_name)); //6.判断是否是上传的文件,并执行上传 if(is_uploaded_file($up_info[$k_name]['tmp_name'])){ if(move_uploaded_file($up_info[$k_name]['tmp_name'],$ob_path.'/'.$new_name)){ echo '文件上传成功!'; }else{ echo '上传文件移动失败!'; } }else{ echo '文件不是上传的文件'; } } //for循环的括号 //3.上面的循环是嵌入到文件上传的代码中的,可能有点不好理解,这儿提供第三种法, //先定义单个文件上传的函数,再循环调用这个函数,每次传入一个文件的上传信息, //也可以到达多文件上传的目的,而且这种方式,更容易理解。 //上传的表单的形式和第二种方法中的相同,即: <form action="" method="post" enctype="multipart/form-data"> <input type="hidden" name="MAX_FILE_SIZE" value=""> <input type="file" name="pic1" ><br> <input type="file" name="pic2"><br> <input type="file" name="pic3"><br> <input type="submit" value="upload"> </form> //定义函数如下: /* *单文件上传函数 *@param array $up_info 记录上传文件信息的超全局数组 *@param string $to_path 上传文件的目标路径 *@param array $typlist 允许的文件类型 *@param int $file_size允许的文件大小 *@return string 上传失败,返回失败的原因, * * 成功返回包括文件名的路径。 */ function upload_fun($up_info,$to_path,$typelist=array(),$file_size=2000000){ //1.判断文件上传是否错误 if($up_file['error']>0){ switch($up_info['error']){ case 1: $err_info="上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值"; break; case 2: $err_info="上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值"; break; case 3: $err_info="文件只有部分被上传"; break; case 4: $err_info="没有文件被上传"; break; case 6: $err_info="找不到临时文件夹"; break; case 7: $err_info="文件写入失败"; break; default: $err_info="未知的上传错误"; break; } return $err_info; die(); } //2.判断上传文件类型是否合法 if(count($typelist)>0){ if(!in_array($up_info['type'],$typelist)){ $err_info='文件类型不合法!'.$up_info['type']; return $err_info; die(); } } //4.判断上传文件大小是否超出允许值 if($up_info['size']>$file_size){ return $err_info='文件大小超过'.$file_size; die(); } //5.上传文件重命名 $exten_name=pathinfo($up_info['name'],PATHINFO_EXTENSION); do{ $main_name=date('YmHis'.'--'.rand(100,999)); $new_name=$main_name.'.'.$exten_name; }while(file_exists($to_path.'/'.$new_name)); //6.判断是否是上传的文件,并移动文件 if(is_uploaded_file($up_info['tmp_name'])){ if(move_uploaded_file($up_info['tmp_name'],$to_path.'/'.$new_name)){ $err_info=$to_path.'/'.$new_name; return $err_info; die(); }else{ return $err_info='上传文件移动失败!'; die(); } }else{ return $err_info='这个文件不是上传文件!'; die(); } } //函数使用方法如下 $multi_info=$_FILES; //接收$_FILES的全部上传信息 $to_path='system'; //上传文件的目标路径 foreach($multi_info as $name=>$up_info){ //foreach 遍历$multi_info $err_info=upload_fun($up_info,$to_path); //调用单文件上传函数 p($err_info); //输出返回信息; }
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