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The example of this article describes the encapsulation of single file, multiple single files, and multi-file upload functions in PHP. Share it with everyone for your reference, the details are as follows:
Form:
s.php
To be able to select multiple files at one time when selecting to upload file, then add multiple="multiple", and pay attention to the difference between name="myFile1" and name="myFile[]". File, multiple file upload.
<!doctype html> <html> <head> <meta charset="utf-8"> <title>无标题文档</title> </head> <body> <form action="sss.php" method="post" enctype="multipart/form-data"> <input type="file" name="myFile1" /><br/> <input type="file" name="myFile2" /><br/> <input type="file" name="myFile[]" /><br/> <input type="file" name="myFile[]" /><br/> <input type="file" name="myFile[]" multiple="multiple"/><br/> <input type="submit" value="上传文件"/> </form> </body> </html>
Encapsulation of upload function:
ss.php
<?php
header('Content-Type:text/html;charset=utf-8');
//构建上传文件信息
function getFiles(){
$i=0;
foreach($_FILES as $file){
//因为这时$_FILES是个三维数组，并且上传单文件或多文件时，数组的第一维的类型不同，这样就可以拿来判断上传的是单文件还是多文件
if(is_string($file['name'])){
//如果是单文件
$files[$i]=$file;
$i++;
}elseif(is_array($file['name'])){
//如果是多文件
foreach($file['name'] as $key=>$val){
$files[$i]['name']=$file['name'][$key];
$files[$i]['type']=$file['type'][$key];
$files[$i]['tmp_name']=$file['tmp_name'][$key];
$files[$i]['error']=$file['error'][$key];
$files[$i]['size']=$file['size'][$key];
$i++;
}
}
}
return $files;
}
//针对于单文件、多个单文件、多文件的上传
//默认允许上传的文件只为图片类型，并且只有这些图片类型:$allowExt=array('jpeg','jpg','png','gif');并且检查上传的文件是否为真实的图片$flag=true
//默认上传保存的文件夹为本地的'uploads'文件夹，允许上传文件的大小最大为2M
function uploadFile($fileInfo,$path='./uploads',$flag=true,$allowExt=array('jpeg','jpg','png','gif'),$maxSize=2097152){
//判断错误号
if($fileInfo['error']===UPLOAD_ERR_OK){
//检测上传文件的大小
if($fileInfo['size']>$maxSize){
$res['mes']=$fileInfo['name'].'上传文件过大';
}
$ext=getExt($fileInfo['name']);
//检测上传文件的文件类型
if(!in_array($ext,$allowExt)){
$res['mes']=$fileInfo['name'].'非法文件类型';
}
//检测是否是真实的图片类型
if($flag){
if(!getimagesize($fileInfo['tmp_name'])){
$res['mes']=$fileInfo['name'].'不是真实图片类型';
}
}
//检测文件是否是通过HTTP POST上传上来的
if(!is_uploaded_file($fileInfo['tmp_name'])){
$res['mes']=$fileInfo['name'].'文件不是通过HTTP POST方式上传上来的';
}
if( $res ) return $res; //如果要不显示错误信息的话，用if( @$res ) return $res;
//$path='./uploads';
//如果没有这个文件夹，那么就创建一
if(!file_exists($path)){
mkdir($path,0777,true);
chmod($path,0777);
}
//新文件名唯一
$uniName=getUniName();
$destination=$path.'/'.$uniName.'.'.$ext;
//@符号是为了不让客户看到错误信，也可以删除
if(!@move_uploaded_file($fileInfo['tmp_name'],$destination)){
$res['mes']=$fileInfo['name'].'文件移动失败';
}
$res['mes']=$fileInfo['name'].'上传成功';
$res['dest']=$destination;
return $res;
}else{
//匹配错误信息
//注意！错误信息没有5
switch($fileInfo['error']){
case 1:
$res['mes'] = '上传文件超过了PHP配置文件中upload_max_filesize选项的值';
break;
case 2:
$res['mes'] = '超过了HTML表单MAX_FILE_SIZE限制的大小';
break;
case 3:
$res['mes'] = '文件部分被上传';
break;
case 4:
$res['mes'] = '没有选择上传文件';
break;
case 6:
$res['mes'] = '没有找到临时目录';
break;
case 7:
$res['mes'] = '文件写入失败';
break;
case 8:
$res['mes'] = '上传的文件被PHP扩展程序中断';
break;
}
return $res;
}
}
?>common.ss.php
<?php
//这两函数也可以一起放到ss.php里面去
//得到文件扩展名
function getExt($filename){
return strtolower(pathinfo($filename,PATHINFO_EXTENSION));
}
//产生唯一字符串
function getUniName(){
return md5(uniqid(microtime(true),true));
}
?>Operation of files after uploading:
<?php
header("content-type:text/html;charset=utf-8");
require_once 'ss.php';
require_once 'common.ss.php';
$files=getFiles();
//修改允许上传文件的类型，为('jpeg','jpg','png','gif','html','txt')，也可以增加新的，如pdf，pptx等等
$allowExt=array('jpeg','jpg','png','gif','html','txt');
foreach($files as $fileInfo){
//修改上传保存的文件夹为本地的'imooc'，如果没有这个文件夹，那么就创建一个
//'false'参数:不要检查上传的文件是否为真实的图片，因为要允许上传除开图片类型外的其他类型文件，如html、txt
$res=uploadFile($fileInfo,'imooc',false,$allowExt);
echo $res['mes'],'<br/>';
$uploadFiles[]=$res['dest'];//如果要不显示错误信息的话，用@$uploadFiles[]=$res['dest'];
}
$uploadFiles=array_values(array_filter($uploadFiles));//这样便于保存到数据库
print_r($uploadFiles);//打印查看上传保存的结果
?>Related learning recommendations: PHP programming from entry to proficiency
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