PHP教程：php实现文件预览功能
2017-9-4编辑:daibenhua
本篇是上传后图片预览和更改：
代码如下：
1.yulan.php
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http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>无标题文档<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;}<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()" /> <iframe style="display:none" name="shangchuan" id="shangchuan"><script type="text/javascript">//回调函数,调用该方法传一个文件路径，改变背景图function showimg(url){ var div = document.getElementById("yl"); div.style.backgroundImage = "url("+url+")"; document.getElementById("tp").value = url;} |
2.ylchuli.php
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if($_FILES["file"]["error"]){ echo $_FILES["file"]["error"];}else{ if(($_FILES["file"]["type"]=="image/jpeg" || $_FILES["file"]["type"]=="image/png")&& $_FILES["file"]["size"]<1024000) { $fname = "./images/".date("YmdHis").$_FILES["file"]["name"]; $filename = iconv("UTF-8","gb2312",$fname); if(file_exists($filename)) { echo "
"; } else { move_uploaded_file($_FILES["file"]["tmp_name"],$filename); $delurl = iconv("UTF-8","gb2312",$_POST["tp"]); unlink($delurl); //删除文件 echo "
"; } }} |
以上就是本文的全部内容，希望对大家的学习有所帮助