php download function
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upload.php starts
<?php
function upload_file($fileInfo,$uploadPath='./uploads',$imageFlag=true,$allowExt=array('jpeg','jpg','png','gif'),$maxSize=209708){
define('UPLOAD_ERRS',[
'upload_max_filesize'=>'超过了PHP配置文件中upload_max_filesize选项的值',
'form_max_size'=>'超过了表单MAX_FILE_SIZE选项的值',
'upload_file_partial'=>'文件部分被上传',
'no_upload_file_select'=>'没有选择上传文件',
'upload_system_error'=>'系统错误',
'no_allow_ext'=>'非法文件类型',
'exceed_max_size'=>'超出允许上传的最大值',
'not_true_image'=>'文件不是真实图片',
'not_http_post'=>'文件不是通过HTTP POST方式上传上来的',
'move_error'=>'文件移动失败'
]);
//检测是否上传是否有错误
if($fileInfo['error']===UPLOAD_ERR_OK){
//检测上传文件类型
$ext=strtolower(pathinfo($fileInfo['name'],PATHINFO_EXTENSION));
if(!in_array($ext,$allowExt)){
echo UPLOAD_ERRS['no_allow_ext'];
return false;
}
//检测上传文件大小是否符合规范
if($fileInfo['size']>$maxSize){
echo UPLOAD_ERRS['exceed_max_size'];
return false;
}
//检测是否是真实图片
if($imageFlag){
if(@!getimagesize($fileInfo['tmp_name'])){
echo UPLOAD_ERRS['not_true_image'];
return false;
}
}
//检测文件是否通过HTTP POST方式上传上来的
if(!is_uploaded_file($fileInfo['tmp_name'])){
return UPLOAD_ERRS['not_http_post'];
}
//检测目标目录是否存在，不存在则创建
if(!is_dir($uploadPath)){
mkdir($uploadPath,0777,true);
}
//生成唯一文件名，防止重名产生覆盖
$uniName=md5(uniqid(microtime(true),true)).'.'.$ext;
$dest=$uploadPath.DIRECTORY_SEPARATOR.$uniName;
//移动文件
if(@!move_uploaded_file($fileInfo['tmp_name'],$dest)){
echo UPLOAD_ERRS['move_error'];
return false;
}
echo '文件上传成功';
return $dest;
}else{
switch($fileInfo['error']){
case 1:
// $mes='超过了PHP配置文件中upload_max_filesize选项的值';
$mes=UPLOAD_ERRS['upload_max_filesize'];
break;
case 2:
$mes=UPLOAD_ERRS['form_max_size'];
break;
case 3:
$mes=UPLAOD_ERRS['upload_file_partial'];
break;
case 4:
$mes=UPLOAD_ERRS['no_upload_file_select'];
break;
case 6:
case 7:
case 8:
$mes=UPLAOD_ERRS['upload_system_error'];
break;
}
echo $mes;
return false;
}
}
?>upload.php ends
html的开始 <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Document</title> </head> <body> <!-- <a href="http://localhost:8081/download.php?filename=5.html">下载5.html</a> --> <h1>文件上传</h1> <form action="http://localhost:8081/doUpload.php" method='post' enctype="multipart/form-data"> <input type="file" name="myFile" id=""> <input type="submit" value="立即上传"> </form> </body> </html> html的结束 doUpload.php的开始 <?php require_once('upload.php'); $fileInfo=$_FILES['myFile']; var_dump(upload_file($fileInfo)); ?>
doUpload.php ends
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