html代码:
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< div id = "images" style = "width:250px;height:120px;background:#fff;border:1px solid #ccc;" > < form enctype = "multipart/form-data" action = "./includer/importimg.inc.php?action=img" method = "post" name = "imge" > < input type = "hidden" name = "MAX_FILE_SIZE" value = "100000000" /> < input value = "导入文件" type = "file" name = "img" id = "file" />< br />< br /> < input type = "submit" id = "imgbut" class = "buttons" value = "上传图片" /> </ form > </ div > |
php代码:
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<?php /** *Mwbe Version1.0 *----------------------------------------------- *Copy 2013-2014 ylt *Web: communicate *----------------------------------------------- *Author: tao *Data: 2014-7-22 */ header( "Content-Type:text/html;charset=utf-8" ); //step 1 使用$_FILES['pic']["error"] 检查错误 if (isset( $_GET [ "action" ])== "img" ){ if ( $_FILES [ "img" ][ "error" ] > 0){ switch ( $_FILES [ "img" ][ "error" ]) { case 1: echo "<script type='text/javascript'>alert('上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值<br>');history.back();</script>" ; break ; case 2: echo "<script type='text/javascript'>alert('上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值');history.back();</script>" ; break ; case 3: echo "<script type='text/javascript'>alert('文件只有部分被上传');history.back();</script>" ; break ; case 4: echo "<script type='text/javascript'>alert('没有文件被上传');history.back();</script>" ; break ; default : echo "<script type='text/javascript'>alert('末知错误');history.back();</script>" ; } exit ; } $maxsize =2000000; //50k //step 2 使用$_FILES["pic"]["size"] 限制大小 单位字节 2M=2000000 if ( $_FILES [ "img" ][ "size" ] > $maxsize ) { echo "<script type='text/javascript'>alert('上传的文件太大,不能超过{$maxsize}字节');history.back();</script>" ; exit ; } //step 3 使用$_FILES["pic"]["type"]或是文件的扩展名 限制类型 MIME image/gif image/png gif png jpg /* list($dl, $xl) = explode("/", $_FILES["pic"]["type"]); if($dl!="image"){ echo "请上传一个图片,不充许其它类型文件"; exit; } */ $allowtype = array ( "png" , "gif" , "jpg" , "jpeg" ); $arr = explode ( "." , $_FILES [ "img" ][ "name" ]); $hz = $arr [ count ( $arr )-1]; if (!in_array( $hz , $allowtype )){ echo "<script type='text/javascript'>alert('这是不允许的类型');history.back();</script>" ; exit ; } //step 4 将让传后的文件名改名 $filepath = "../imgweb/" ; $fileimgweb = "imgweb/" ; //为了符合UBB的路径 $randname = date ( "Y" ). date ( "m" ). date ( "d" ). date ( "H" ). date ( "i" ). date ( "s" ).rand(100, 999). "." . $hz ; //将临时位置的文件移动到指定的目录上即可 if ( is_uploaded_file ( $_FILES [ "img" ][ "tmp_name" ])){ if (move_uploaded_file( $_FILES [ "img" ][ "tmp_name" ], $filepath . $randname )){ echo "<script type='text/javascript'>history.back();</script>" ; session_start(); $_SESSION [ 'images' ] = $fileimgweb . $randname ; } else { echo "<script type='text/javascript'>alert('上传失败');history.back();</script>" ; } } else { echo "<script type='text/javascript'>alert('不是一个上传文件');history.back();</script>" ; } } ?> |