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其代码如下: 上传表单 <form class="imageform" method="post" enctype="multipart/form-data" action=""> <div class="up_status" style="display:none"><img src="loader.gif" alt="uploading"/></div> <div class="btn up_btn"> <span>添加图片</span> <input class="photoimg" type="file" name="photoimg"> </div> </form> <div class="preview_img"></div> 引入样式和上传插件 <link rel="stylesheet" type="text/css" href="css/" /> <script type="text/javascript" src=""></script> <script type="text/javascript" src=""></script> jQuery $("body")("change", "oimg", function() { var obj = $(this); var imageForm = nts("eform"); var preview_img = ("iew_img"); var btn = ("_btn"); Form({ target: preview_img, beforeSubmit: function() { ("iew_img")(""); preview_(); (); }, success: function() { preview_(); (); }, error: function() { (); preview_(); } })it(); }); PHP上传 if (isset($_POST) and $_SERVER['REQUEST_METHOD'] == "POST") { $name = $_FILES['photoimg']['name']; $size = $_FILES['photoimg']['size']; if (empty($name)) { echo '请选择要上传的图片'; exit; } $ext = extend($name); if (!in_array($ext, $extArr)) { echo '图片
格式错误!'; exit; } if ($size > (1000 * 1024)) { echo '图片大小不能超过1M'; exit; } $image_name = time() . rand(100, 999) . "." . $ext; $tmp = $_FILES['photoimg']['tmp_name']; if (move_uploaded_file($tmp, $path . $image_name)) { echo '<img src="' . $path . $image_name . '" class="preview">'; } else { echo '上传出错了!'; } exit; }