一、普通文件上传
1，前端代码
复制代码 代码示例:
<form action="upload_file.php" method="post" enctype="multipart/form-data">
<label for="file">Filename:</label>
<input type="file" name="file" id="file" />
<br /><input type="submit" name="submit" value="Submit" />
</form>
2，upload_file.php
复制代码 代码示例:
<?php
//php普通文件上传
//by www.jb200.com
if ((($_FILES["file"]["type"] == "image/gif")|| ($_FILES["file"]["type"] == "image/jpeg")|| ($_FILES["file"]["type"] == "image/pjpeg"))&& ($_FILES["file"]["size"] < 20000)){
if ($_FILES["file"]["error"] > 0) {
echo "Return Code: " . $_FILES["file"]["error"] . "<br />";
}else {
echo "Upload: " . $_FILES["file"]["name"] . "<br />";
echo "Type: " . $_FILES["file"]["type"] . "<br />";
echo "Size: " . ($_FILES["file"]["size"] / 1024) . " Kb<br />";
echo "Temp file: " . $_FILES["file"]["tmp_name"] . "<br />";
if (
file_exists("upload/" . $_FILES["file"]["name"])){
echo $_FILES["file"]["name"] . " already exists. ";
}else{
move_uploaded_file($_FILES["file"]["tmp_name"],
"upload/" . $_FILES["file"]["name"]);
echo "Stored in: " . "upload/" . $_FILES["file"]["name"];
}
}
}else {
echo "Invalid file";
}
?>
二、异步文件上传
使用iframe异步上传文件。
1，前端html
复制代码 代码示例:
<form id="upForm" action="upload.php" method="post" enctype="multipart/form-data" target="upload_target" >
导入文件：<input type="file" name="myfile" id="myfile" />
<input type="submit" name="submitBtn" value="导入" />
<iframe id="upload_target" name="upload_target" src="#" style="width:0;height:0;border:0px solid #fff;"></iframe>
</form>
<span id="info"></span>
2，Js代码
复制代码 代码示例:
function startUpload() {
var spanObj = document.getElementById("info");
spanObj.innerHTML = " 开始上传";
document.getElementById("upForm").sumbit();
}
//回调
function stopUpload(responseText){
var spanObj = document.getElementById("info");
spanObj.innerHTML = "上传成功";
spanObj.innerHTML = responseText;
}
2）、服务器端代码
复制代码 代码示例:
<?php
$file = $_FILES['myfile'];
$fileName = uploadFile($file);
//$result = readFromFile("../upload/" . $fileName);
echo "<script type='text/javascript'>window.top.window.stopUpload('{$fileName}')</script>";
function uploadFile($file) {
// 上传路径
$destinationPath = "../upload/";
if (!file_exists($destinationPath)){
mkdir($destinationPath , 0777);
}
//重命名
$fileName = date('YmdHis') . '_' . iconv('utf-8' , 'gb2312' , basename($file['name']));
if (move_uploaded_file($file['tmp_name'], $destinationPath . $fileName)) {
return iconv('gb2312' , 'utf-8' , $fileName);
}
return '';
}
//代码注释
/*
1，关于basename方法
$path = "/testweb/home.php";
//显示带有文件扩展名的文件名
echo basename($path);
//显示不带有文件扩展名的文件名
echo basename($path,".php");
2，关于iconv
iconv('gb2312' , 'utf-8' , $fileName);//将$fileName从gb2312转为utf-8格式。
注：该函数需要开启php.ini里面的php_iconv.dll
3，关于$_FILES['myfile']
$_FILES相当于一个二维数组，而$_FILES['myfile']相当于一个一维数组。所以可以
$f = $_FILES['myfile'];
echo $f['name'];
如果直接访问该$_FILES['myfile']，则会报Undefined index: myfile。此时加上
if(!isset($_FILES['myfile'])){
die('上传文件不存在！');
}
*/
