PHP判断file框是否已选择文件(支持多文件)
本例子要告诉你几种处理办法,一是用js 或者是jquery遍历判断,另一种是传给php之后利用tmp_name值来判断,方法都简单下面我们一起来看看。
单个表单时
代码如下 | 复制代码 |
|
当然这个可以先用JS去判断一下,方法如下:
代码如下 | 复制代码 |
<script><br /> var send=document.getElementById("send");<br /> send.onclick=function() {<br /> var file=document.getElementById("file").value;<br /> if (file.length<1) {<br /> alert('请选择图片');<br /> return false;<br /> }<br /> }<br /> </script> |
多文件上传时
表单中有多个,
提交表单时需要判断其中至少要有一个input已经选择好文件。
代码如下 | 复制代码 |
|
使用jQuery进行判断:
代码如下 | 复制代码 |
var fileFlag = false; |
只要fileFlag为true,就可以退出each循环,不需要再对剩下的input进行判断。
在each中使用return false退出循环,使用return true结束当前次循环,进行下一次循环。

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