本文章是一款图片上传代码,他可以把上传到服务器的图片在进行预览修改,如果是你想的你就可以保存了,不是可以删除再重新上传,实例代码如下:
if (!isset( $_session ))session_start(); /**2010-6-22 * $data 数组类型 包含以下变量 ------------------------------- * $sub_type submit类型(upload：上传按钮 delete：删除按钮)，默认upload * $file 通过表单获取的$_files['filename']数组 * $img_tag_id 预览图片的<img>的id值 * $img_dir 上传图片的目录 * $max_file_size 单位m(兆)，默认：1m * $type_array 允许的上传的图片类型(默认：image/pjpeg、image/jpeg、image/gif) **/ function upload( $data ){ if (! $data [ 'file' ]){ echo '<script>alert("file不能为空！");</script>' ; exit ; } if (! $data [ 'img_tag_id' ]){ echo '<script>alert("预览图片标签id不能为空！");</script>' ; exit ; } if (! $data [ 'img_dir' ]){ echo '<script>alert("图片上传目录不能为空！");</script>' ; exit ; } if (!isset( $data [ 'max_file_size' ])){ $data [ 'max_file_size' ] = 1024 * 1024; } else { $data [ 'max_file_size' ] = $data [ 'max_file_size' ] * 1024 * 1024; } if (!isset( $data [ 'type_array' ])){ $data [ 'type_array' ] = array ( 'image/pjpeg' , 'image/jpeg' , 'image/gif' ); } if (!isset( $data [ 'sub_type' ])){ $data [ 'sub_type' ] = 'upload' ; } $imgpath = '' ; if (isset( $data [ 'sub_type' ]) && $data [ 'sub_type' ] == 'delete' ){ if (isset( $_session [ 'name' ]) && $_session [ 'name' ]){ if ( is_file ( $_session [ 'imgpath' ])){ $b = unlink( $_session [ 'imgpath' ]); } unset( $_session [ 'name' ], $_session [ 'imgpath' ]); if (!isset( $_session [ 'name' ])){ echo '<script>alert("删除成功！");</script>' ; echo '<script>parent.document.getelementbyid("' . $data [ 'img_tag_id' ]. '").style.display = "none";</script>' ; } else { echo '<script>alert("删除失败！");</script>' ; } } else { echo '<script>alert("没有稿件！");</script>' ; } exit ; } if (isset( $_session [ 'imgpath' ]) && $_session [ 'imgpath' ]){ echo '<script>alert("稿件已经存在，要想重新上传请删除原来的稿件！");</script>' ; exit ; } if (!in_array( $data [ 'file' ][ 'type' ], $data [ 'type_array' ])){ echo '<script>alert("稿件类型不匹配，请上传.jpg、.gif和.png格式的图片！");</script>' ; exit ; } if ( $data [ 'file' ][ 'size' ] > $data [ 'max_file_size' ]){ echo '<script>alert("您上传的稿件过大，请选择2m以下的图片上传！");</script>' ; exit ; } if (! is_dir ( $data [ 'img_dir' ])){ @ mkdir ( $data [ 'img_dir' ], 0777, true); } $imgpath = $data [ 'img_dir' ]. '/' . date ( 'his' , time()).rand(100, 999). $data [ 'file' ][ 'name' ]; $isupload = move_uploaded_file( $data [ 'file' ][ 'tmp_name' ], $imgpath ); if (! $isupload ){ echo '<script>alert("稿件上传失败，请尝试重新上传！");</script>' ; exit ; } else { echo '<script>alert("稿件上传成功！");</script>' ; } $_session [ 'name' ] = $data [ 'file' ][ 'name' ]; $_session [ 'imgpath' ] = $imgpath ; return $imgpath ; } /*test_start*/ $sub_type = '' ; if (isset( $_post [ 'submit_upload' ])) $sub_type = 'upload' ; if (isset( $_post [ 'submit_delete' ])) $sub_type = 'delete' ; if ( $sub_type ){ //echo '<script>alert("'.$sub_type.'");</script>';exit; $data = array ( 'sub_type' => $sub_type , 'file' => $_files [ 'file' ], 'img_tag_id' => 'picview' , 'img_dir' => 'upload_img' , ); $imgpath = upload( $data ); } else { $imgpath = isset( $_session [ 'imgpath' ])? $_session [ 'imgpath' ]: '' ; } ?> <form action= "ad.php" method= "post" enctype= "multipart/form-data" target= "frame" > <input type= "file" name= "file" class = "input" > <input type= "submit" name= "submit_upload" value= "上 传" > <input type= "submit" name= "submit_delete" value= "删 除" > <iframe id= "frame" name= "frame" width= "0" height= "0" marginwidth= "0" frameborder= "0" src= "about:blank" ></iframe> </form> <img id= "picview" height= "100" style= "display:none;" > //开源代码phpfensi.com <script> if ( "<?php echo $imgpath; ?>" ){ parent.document.getelementbyid( "picview" ).src = "<?php echo $imgpath; ?>" ; parent.document.getelementbyid( "picview" ).style.display = "block" ; } </script>声明：本文来自网络，不代表【好得很程序员自学网】立场，转载请注明出处：http://www.haodehen.cn/did29450