单文件上传 <?php header("Content-type:text/html;charset=utf-8"); /* * @param1 array $file , 上传文件的信息 * @param2 array $allow_type , 运行上传的mime * @param3 string $path , 存储的路径 * @param4 string &$error , 错误消息 * @param5 array $allow_format , 允许上传的文件格式 * @param6 int $max_size , 允许上传的最大值（必须比配置文件中的值小） */ function upload_single($file,$allow_type,$path,&$error,$allow_format = array(),$max_size = 2000000){ // 判断文件是否有效 if(!is_array($file) || !isset($file['error'])){ $error = '不是一个有效的文件'; return false; } // 判断文件上传路径是否存在 if(!is_dir($path)){ $error = '文件存储路径不存在'; return false; } // 判断文件上传过程是否出错 switch ($file['error']) { case 1: case 2: $error = '文件超出预设值'; return false; case 3: $error = '文件上传过程出错'; return false; case 4: $error = '没有选中要上传的文件'; return false; case 6: case 7: $error = '文件保存失败'; return false; } // 判断mime类型 if(!in_array($file['type'],$allow_type)){ $error = '请上传正确的文件类型'; return false; } // 判断文件后缀 $ext = ltrim(strrchr($file['name'],'.'),'.'); if(!empty($allow_format) && !in_array($ext,$allow_format)){ $error = '请上传正确的文件类型'; return false; } // 判断文件大小 if($file['size'] > $max_size){ $error = '当前文件超出大小，请不要大于' . $max_size . '字节'; } // 移动到指定目录 if(!is_uploaded_file($file['tmp_name'])){ $error = '错误，不是上传文件'; return false; } // 构造文件名字并上传 $fullname = strstr($file['type'],'/',true) . date('Ymd') . mt_rand(10000,99999) . '.' .$ext; if(move_uploaded_file($file['tmp_name'],$path . '/' . $fullname)){ return $fullname; }else{ $error = '文件上传失败'; return false; } } $file = $_FILES['img']; $path = 'upload'; $allow_type = array('image/jpg','image/jpeg'); $allow_format = array('jpg','jpeg','JPG','JPEG'); $max_size = 1048576; if($filename = upload_single($file,$allow_type,$path,$error,$allow_format,$max_size)){ echo $filename; }else{ echo $error; } <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>单上传文件</title> </head> <body> <div> <form action="2.4.php" method="post" enctype="multipart/form-data"> <input type="file" name="img" /> <input type="submit" /> </form> </div> </body> </html> 多文件上传 <?php header("Content-type:text/html;charset=utf-8"); // 多文件一起上传 $fileName = $_FILES['img']['name']; $fileTmp = $_FILES['img']['tmp_name']; foreach($fileTmp as $key => $value){ if(is_uploaded_file($value)){ move_uploaded_file($value,'upload/' . $fileName[$key]); echo '文件上传成功'; }else{ echo '文件上传失败'; } } <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> </head> <body> <form action="2.2.php" method="post" enctype="multipart/form-data"> <input type="file" name="img[]" multiple="multiple" /> <input type="submit" value="上传" /> </form> </body> </html>