文件分为两部分html和php部分
html部分就不详细说明了
<html>
<head>
<meta http-equiv="content-type" content="text/html charset=uft-8"/>
<title></title>
<style>
.style1{
font-size:12px;
}
input{
font-size:12px;
margin-left:5px;
padding:5px;
}
input[type=submit]{
width:80px;
height:28px;
margin:5px;
font-size:14px;
line-height:1em;
background-color:#acacac;
color:white;
border:none;
}
</style>
</head>
<body>
<table border="1" cellpadding="0" cellspacing="0" width="480px" bgcolor="#ffffff" bordercolor="#acacac">
<form action="uploadok.php" method="post" enctype="multipart/form-data" name="form1">
<tr>
<td width="88px" height="30px" align="right" class="style1">内容1：</td>
<td width="369px"><input name="picture[]" type="file" id="picture[]" size="30"></td>
</tr>
<tr>
<td width="88px" height="30px" align="right" class="style1">内容2：</td>
<td width="369px"><input name="picture[]" type="file" id="picture[]" size="30"></td>
</tr>
<tr>
<td width="88px" height="30px" align="right" class="style1">内容3：</td>
<td width="369px"><input name="picture[]" type="file" id="picture[]" size="30"></td>
</tr>
<tr>
<td width="88px" height="30px" align="right" class="style1">内容4：</td>
<td width="369px"><input name="picture[]" type="file" id="picture[]" size="30"></td>
</tr>
<tr>
<td width="88px" height="30px" align="right" class="style1">内容5：</td>
<td width="369px"><input name="picture[]" type="file" id="picture[]" size="30"></td>
</tr>
<tr>
<td colspan="2" align="center"><input type="submit" name="submit" value="提交"/></td>
</tr>
</form>
</table>
</body>
</html>
下面是php部份uploadok.php
<?php
if(!is_dir("./upfile")){
//判断是否有上传文件夹，没有就创建
mkdir("./upfile");
}
array_push($_FILES['picture']['name'],''); //创建文件数组，以在末尾添加一个空白形成数组
$array=array_unique($_FILES['picture']['name']); //去掉重复
array_pop($array); //再去掉末尾的空白数组值
for($i=0;$i<count($array);$i++){
$first=explode(".",$_FILES['picture']['name'][$i]); //.为后缀分割字符成数组
$ext=strtolower(end($first)); //取得数组的最后一项
$arr=array('jpg','png'); //建立以后缀格式的数组
$b=in_array($ext,$arr); //判断后缀是否在数组中存在，如果有返回true
if($b){
$name=md5($_FILES['picture']['name'][$i]).".".$ext;
$path="./upfile\\";
if(move_uploaded_file($_FILES['picture']['tmp_name'][$i],$path.$name)){
$result=true;
echo "文件上传成功，请稍等...";
echo "<meta http-equiv=\"refresh\" content=\"3; url=1-13.php\">";
}else{
$result=false;
echo "文件保存失败，请稍等...";
echo "<meta http-equiv=\"refresh\" content=\"3; url=1-13.php\">";
}
}else{
echo "文件格式不正确，请稍等...";
echo "<meta http-equiv=\"refresh\" content=\"3; url=1-13.php\">";
}
}
?>
结尾：有个bug，如果上传一个文件时只能用第一个，用第二个或其它的会报文件格式不正确，这就是bug出错，
多文件上传是正常