PHP(外文名: Hypertext Preprocessor,中文名:“超文本预处理器”)是一种通用开源脚本语言。语法吸收了C语言、Java和Perl的特点,入门门槛较低,易于学习,使用广泛,主要适用于web开发领域。PHP的文件后缀名为php。
这篇文章主要为大家详细介绍了php实现头像上传预览功能的相关资料,具有一定的参考价值,感兴趣的小伙伴们可以参考一下
主页面1.php
- <html>
- <head>
- <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
- <title>上传头像</title>
- <style type="text/CSS">
- *{
- font-family:"微软雅黑";}
- #zong{
- /*border:1px solid black;*/
- position:relative;
- width:52%;
- height:500x;
- left:24%}
- .nr{
- float:left;
- margin-right:30px;}
- #yl{width:240px; height:240px; background-size:240px 240px;}
- #file{width:240px; height:240px; float:left; opacity:0;}
- </style>
- </head>
- <body>
- <div id="zong">
- <form id="sc" action="2.php" method="post" enctype="multipart/form-data" target="shangchuan">
- <input type="hidden" name="tp" value="" id="tp" />
- <div id="yl" style="background-image:url(./image/1.jpg)" class="nr">//头像显示的位置
- <input type="file" name="file" id="file" onchange="document.getElementById('sc').submit()" />
- </div>
- <div class="nr">
- </div>
- </form>
- <iframe style="display:none" name="shangchuan" id="shangchuan">
- </iframe>
- </div>
- </body>
- <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;
- }
- </script>
- </html>
处理页面2.php
- <?php
- session_start();
- $uid = $_SESSION["uid"];
- if($_FILES["file"]["error"])
- {
- echo $_FILES["file"]["error"];
- }
- else
- {
- if(($_FILES["file"]["type"]=="image/jpeg" || $_FILES["file"]["type"]=="image/png")&& $_FILES["file"]["size"]<1024000)
- {
- $fname = "./a/image/".date("YmdHis").$_FILES["file"]["name"]; //头像存储的路径
- $filename = iconv("UTF-8","gb2312",$fname);
- if(file_exists($filename))
- {
- echo "<script>alert('该文件已存在!');</script>";
- }
- else
- {
- move_uploaded_file($_FILES["file"]["tmp_name"],$filename);
- unlink($_POST["tp"]);
- echo "<script>parent.showimg('{$fname}');</script>";
- }
- }
- }
打开显示:
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来源: http://www.phperz.com/article/17/0902/340059.html