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php實現(xiàn)文件預(yù)覽功能
上一篇博客是上傳功能，本篇是上傳后圖片預(yù)覽和更改：
代碼如下：
1.yulan.php
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>無標題文檔</title>
<style type="text/css">
#yl{ width:200px; height:300px; background-image:url(images/timg1.jpg); background-size:200px 300px;}
#file{ width:200px; height:300px; float:left; opacity:0;}
</style>
</head>
<body>
<form id="sc" action="ylchuli.php" method="post" enctype="multipart/form-data" target="shangchuan">
<input type="hidden" name="tp" value="" id="tp" />
<div id="yl">
<input type="file" name="file" id="file" onchange="document.getElementById('sc').submit()" />
</div>
</form>
<iframe style="display:none" name="shangchuan" id="shangchuan">
</iframe>
</body>
<script type="text/javascript">
//回調(diào)函數(shù),調(diào)用該方法傳一個文件路徑，改變背景圖
function showimg(url)
{
var div = document.getElementById("yl");
div.style.backgroundImage = "url("+url+")";
document.getElementById("tp").value = url;
}
</script>
</html>