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Home Backend Development PHP Tutorial javascript - <form>里button,submit,reset 包括<form>自己 name 属性是不是都没有用?

javascript - <form>里button,submit,reset 包括<form>自己 name 属性是不是都没有用?

Jun 06, 2016 pm 08:08 PM
html javascript php

我是零散着学习的,也没做过项目,就是每学一个对象,一个函数,我就做做实验,有联系的东西,我就把类似的往上套

我知道

<code><input type="text" name="" value="" class="">
<input type="radio" checked name="" value="" class="">
<input type="checkbox" checked name="" value="" class=""></code>
Copy after login
Copy after login

中的name确实是有用的,可以给 PHP 传值,但是

<code><form name="★" action="shiyan-1.php" method="get">
<input type="button" id="" class="" name="" value="显示名">
<input type="submit" id="" class="" name="" value="提交">
<input type="reset" id="" class="" name="" value="清空">
</form></code>
Copy after login
Copy after login

中的name属性,除了在JavaScript用 document.getElementsByName("")[0] 和用 jQuery 的$("[name='']") 获取节点之外,是不是就没有其他用处了?
以后只要我不用js,那我就不用写 name 属性了是吗?


还有就是这个

<code><input type="radio" checked name="" value="" class=" ">
<input type="radio" checked name="" value="" class=""></code>
Copy after login
Copy after login

中的 value 有什么用?他们不就是个 布尔值 吗,选上是true,选不上false?用 checked 就能判定了,为什么还有个 value ,这个怎么传给服务器?

回复内容:

我是零散着学习的,也没做过项目,就是每学一个对象,一个函数,我就做做实验,有联系的东西,我就把类似的往上套

我知道

<code><input type="text" name="" value="" class="">
<input type="radio" checked name="" value="" class="">
<input type="checkbox" checked name="" value="" class=""></code>
Copy after login
Copy after login

中的name确实是有用的,可以给 PHP 传值,但是

<code><form name="★" action="shiyan-1.php" method="get">
<input type="button" id="" class="" name="" value="显示名">
<input type="submit" id="" class="" name="" value="提交">
<input type="reset" id="" class="" name="" value="清空">
</form></code>
Copy after login
Copy after login

中的name属性,除了在JavaScript用 document.getElementsByName("")[0] 和用 jQuery 的$("[name='']") 获取节点之外,是不是就没有其他用处了?
以后只要我不用js,那我就不用写 name 属性了是吗?


还有就是这个

<code><input type="radio" checked name="" value="" class=" ">
<input type="radio" checked name="" value="" class=""></code>
Copy after login
Copy after login

中的 value 有什么用?他们不就是个 布尔值 吗,选上是true,选不上false?用 checked 就能判定了,为什么还有个 value ,这个怎么传给服务器?

  1. 当按钮的type="submit", 有name时, 并且method="get", 是会提交的, type="button | reset"不管有没有name都不会

2.type="radio"的value是传个后端的, checked只能js来判断, 只要有name, 自然就会把选择的value传给后端

你这一看就是新手啊 !
我去,我试着给你解答下
1.

里button,submit,reset 包括
自己 name 属性是不是都没有用?
确实没什么用,不管通过$_GET和$_POST获取,获取的都是值,你获取前台的button值,submit值和reset的值没什么用处,所谓的值就是显示在按钮上的文字,个人认为,name只是做一些前段JS和JQuery操作。
2.

这个就有用了,设置单选按钮的value属性,这两个的值是不同的,比如:一个设置为男,一个设置为女,你后端是要获取之后做判断的哦。可以根据value值得不同做一些逻辑处理。
我说的也不是很明白,自己看手册吧
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