使用PHP和HTML5 FormData实现无刷新文件上传教程

这篇文章主要介绍了使用PHP和HTML5 FormData实现无刷新文件上传教程,本文先是分解了程序的编写步骤,最后给出一个完整示例,需要的朋友可以参考下

无刷新文件上传是一个常见而又有点复杂的问题，常见的解决方案是构造 iframe 方式实现。

在 HTML5 中提供了一个 FormData 对象 API，通过 FormData 可以方便地构造一个表单请求，并通过 XMLHttpRequest 来发送。通过 FormData 对象发送文件也是可以的，如此则无刷新上传就变的非常简单了。

那么 FormData 怎么使用呢？下面脚本之家对此进行简单的介绍。

1. 构造 FormData 对象

想得到一个FormData对象，很简单：

?

1

var fd = new FormData();</codebitstream></p></tdbitstream></tdbitstream></tr></tbody></table> <p>FormData 对象只提供了一个方法 append ，用于向对象中添加表单请求参数。<br>在当前主流浏览器中，可通过如下两种方式获取或修改FormData。<br>方法一：创建一个空的FormData对象，然后再用append方法逐个添加键值对。示例：<br></p> <p></p> <p></p> <p><divbitstream vera sans mono new min-height:inherit z-index:10 color:white background:rgb><span>?</span></divbitstream></p> <table border="0" cellpadding="0" cellspacing="0" bitstream vera sans mono new min-height:inherit background:none><tbody><tr><tdbitstream vera sans mono new min-height:inherit color:rgb background:none><p>1</p> <p>2</p> <p>3</p> <p>4</p> <tdbitstream vera sans mono new min-height:inherit background:none><p></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-weight:bold font-size:1em min-height:inherit color:rgb background:none>var<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>fd = <codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-weight:bold font-size:1em min-height:inherit color:rgb background:none>new<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>FormData();</codebitstream></codebitstream></codebitstream></codebitstream></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>fd.append(<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit color:blue background:none>"name"<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>, <codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit color:blue background:none>"脚本之家"<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>);</codebitstream></codebitstream></codebitstream></codebitstream></codebitstream></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>fd.append(<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit color:blue background:none>"blog"<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>, <codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit color:blue background:none>"http://jb51.net"<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>);</codebitstream></codebitstream></codebitstream></codebitstream></codebitstream></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>fd.append(<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit color:blue background:none>"file"<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>, document.getElementById(<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit color:blue background:none>"file"<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>));</codebitstream></codebitstream></codebitstream></codebitstream></codebitstream></p></tdbitstream></tdbitstream></tr></tbody></table> <p>这种方法可以不需要 HTML 的表单对象存在。<br>方法二：取得form元素对象，将它作为参数传入FormData对象中。示例：<br></p> <p></p> <p></p> <p><divbitstream vera sans mono new min-height:inherit z-index:10 color:white background:rgb><span>?</span></divbitstream></p> <table border="0" cellpadding="0" cellspacing="0" bitstream vera sans mono new min-height:inherit background:none><tbody><tr><tdbitstream vera sans mono new min-height:inherit color:rgb background:none><p>1</p> <p>2</p> <tdbitstream vera sans mono new min-height:inherit background:none><p></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-weight:bold font-size:1em min-height:inherit color:rgb background:none>var<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>formobj = document.getElementById(<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit color:blue background:none>"form"<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>);</codebitstream></codebitstream></codebitstream></codebitstream></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-weight:bold font-size:1em min-height:inherit color:rgb background:none>var<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>fd = <codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-weight:bold font-size:1em min-height:inherit color:rgb background:none>new<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>FormData(formobj);</codebitstream></codebitstream></codebitstream></codebitstream></p></tdbitstream></tdbitstream></tr></tbody></table> <p>当然，这里还可以使用 append 方法继续向 fd 中添加其他参数。</p> <p>2. FormData 发送请求</p> <p>得到 FormData 对象了，如何发送请求呢？ FormData 对象主要用于增强型的 XMLHttpRequest 对象的 send 方法中。参考如下示例：<br></p> <p></p> <p></p> <p><divbitstream vera sans mono new min-height:inherit z-index:10 color:white background:rgb><span>?</span></divbitstream></p> <table border="0" cellpadding="0" cellspacing="0" bitstream vera sans mono new min-height:inherit background:none><tbody><tr><tdbitstream vera sans mono new min-height:inherit color:rgb background:none><p>1</p> <p>2</p> <p>3</p> <p>4</p> <p>5</p> <p>6</p> <p>7</p> <p>8</p> <tdbitstream vera sans mono new min-height:inherit background:none><p></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-weight:bold font-size:1em min-height:inherit color:rgb background:none>var<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>xhr = <codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-weight:bold font-size:1em min-height:inherit color:rgb background:none>new<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>XMLHttpRequest();    </codebitstream></codebitstream></codebitstream></codebitstream></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>xhr.open(<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit color:blue background:none>"POST"<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>,<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit color:blue background:none>"http://jb51.net"<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>, <codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-weight:bold font-size:1em min-height:inherit color:rgb background:none>true<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>);</codebitstream></codebitstream></codebitstream></codebitstream></codebitstream></codebitstream></codebitstream></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>xhr.send(fd);</codebitstream></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>xhr.onload = <codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-weight:bold font-size:1em min-height:inherit color:rgb background:none>function<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>(e) {</codebitstream></codebitstream></codebitstream></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>  <codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-weight:bold font-size:1em min-height:inherit color:rgb background:none>if<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>(<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-weight:bold font-size:1em min-height:inherit color:rgb background:none>this<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>.status == 200) {</codebitstream></codebitstream></codebitstream></codebitstream></codebitstream></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>    <codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>alert(<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-weight:bold font-size:1em min-height:inherit color:rgb background:none>this<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>.responseText);</codebitstream></codebitstream></codebitstream></codebitstream></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>  <codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>}</codebitstream></codebitstream></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>};</codebitstream></p></tdbitstream></tdbitstream></tr></tbody></table> <p>3. jquery 中使用 FormData</p> <p>在 jQuery 的 ajax 方法中，也可使用 FormData 方式实现无刷新上传。但要注意参数的设置，参考如下：<br></p> <p></p> <p></p> <p><divbitstream vera sans mono new min-height:inherit z-index:10 color:white background:rgb><span>?</span></divbitstream></p> <table border="0" cellpadding="0" cellspacing="0" bitstream vera sans mono new min-height:inherit background:none><tbody><tr><tdbitstream vera sans mono new min-height:inherit color:rgb background:none><p>1</p> <p>2</p> <p>3</p> <p>4</p> <p>5</p> <p>6</p> <p>7</p> <p>8</p> <p>9</p> <p>10</p> <p>11</p> <p>12</p> <p>13</p> <p>14</p> <p>15</p> <p>16</p> <p>17</p> <p>18</p> <tdbitstream vera sans mono new min-height:inherit background:none><p></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>$.ajax({</codebitstream></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>  <codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>url: <codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit color:blue background:none>"http://jb51.net"<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>,</codebitstream></codebitstream></codebitstream></codebitstream></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>  <codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>type: <codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit color:blue background:none>'POST'<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>,</codebitstream></codebitstream></codebitstream></codebitstream></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>  <codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>data: fd,</codebitstream></codebitstream></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>  <codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit color:rgb background:none>/**</codebitstream></codebitstream></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>   <codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit color:rgb background:none>*必须false才会自动加上正确的Content-Type</codebitstream></codebitstream></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>   <codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit color:rgb background:none>*/</codebitstream></codebitstream></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>  <codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>contentType:<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-weight:bold font-size:1em min-height:inherit color:rgb background:none>false<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>,</codebitstream></codebitstream></codebitstream></codebitstream></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>  <codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit color:rgb background:none>/**</codebitstream></codebitstream></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>   <codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit color:rgb background:none>* 必须false才会避开jQuery对 formdata 的默认处理</codebitstream></codebitstream></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>   <codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit color:rgb background:none>* XMLHttpRequest会对 formdata 进行正确的处理</codebitstream></codebitstream></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>   <codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit color:rgb background:none>*/</codebitstream></codebitstream></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>  <codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>processData:<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-weight:bold font-size:1em min-height:inherit color:rgb background:none>false</codebitstream></codebitstream></codebitstream></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>}).done(<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-weight:bold font-size:1em min-height:inherit color:rgb background:none>function<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>(result){</codebitstream></codebitstream></codebitstream></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>  <codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>console.log(result);</codebitstream></codebitstream></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>}).fail(<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-weight:bold font-size:1em min-height:inherit color:rgb background:none>function<codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>(err){</codebitstream></codebitstream></codebitstream></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>  <codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>console.log(err);</codebitstream></codebitstream></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none>});</codebitstream></p></tdbitstream></tdbitstream></tr></tbody></table> <p>4. 一个完整的示例（包含PHP处理示例）：<br></p> <p></p> <p></p> <p><divbitstream vera sans mono new min-height:inherit z-index:10 color:white background:rgb><span>?</span></divbitstream></p> <table border="0" cellpadding="0" cellspacing="0" bitstream vera sans mono new min-height:inherit background:none><tbody><tr><tdbitstream vera sans mono new min-height:inherit color:rgb background:none><p>1</p> <p>2</p> <p>3</p> <p>4</p> <p>5</p> <p>6</p> <p>7</p> <p>8</p> <p>9</p> <p>10</p> <p>11</p> <p>12</p> <p>13</p> <p>14</p> <p>15</p> <p>16</p> <p>17</p> <p>18</p> <p>19</p> <p>20</p> <p>21</p> <p>22</p> <p>23</p> <p>24</p> <p>25</p> <p>26</p> <p>27</p> <p>28</p> <p>29</p> <p>30</p> <p>31</p> <p>32</p> <p>33</p> <p>34</p> <p>35</p> <p>36</p> <p>37</p> <p>38</p> <p>39</p> <p>40</p> <p>41</p> <p>42</p> <p>43</p> <p>44</p> <p>45</p> <p>46</p> <p>47</p> <p>48</p> <p>49</p> <p>50</p> <p>51</p> <p>52</p> <p>53</p> <p>54</p> <p>55</p> <p>56</p> <p>57</p> <p>58</p> <p>59</p> <p>60</p> <p>61</p> <p>62</p> <p>63</p> <p>64</p> <p>65</p> <tdbitstream vera sans mono new min-height:inherit background:none><p></p> <p><codebitstream vera sans mono new border:0px bottom:auto float:none height:auto left:auto line-height:1.1em margin:0px outline:0px overflow:visible padding:0px position:static right:auto top:auto vertical-align:baseline width:auto font-size:1em min-height:inherit background:none><?php

//php 接收表单提交信息并打印

if( isset( $_REQUEST['do'