php if语句html选项值 [英] php if statement html option value

问题描述

假设您有以下html select语句

Suppose you have the following html select statement

<select>
<option value="Newest">Newest</option>
<option value="Best Sellers">Best Sellers</option>
<option value="Alphabetical">Alphabetical</option>
</select>

现在我想运行一个php if elseif语句，

Now I want to run a php if elseif statement that says,

if (option value = newest) {
// Run this
}
elseif ( option value = best sellers ) {
// Run this
}

等。但是我不知道在if elseif语句中放什么。换句话说，而不是'option value = newest'（我知道这是不正确的），我可以放在那里，如果选择最新，它将执行if语句，或者如果选择了畅销书，它将执行elseif语句？

etc. But I don't know what to put inside the if elseif statement. In other words instead of 'option value = newest' (which I know is incorrect), what can I put there so that if newest is selected it will execute the if statement, or if best sellers is selected it will execute the elseif statement?

推荐答案

给你的选择命名。

<select name="selectedValue">
<option value="Newest">Newest</option>
<option value="Best Sellers">Best Sellers</option>
<option value="Alphabetical">Alphabetical</option>
</select>

在你的PHP中，你会这样做：

in your PHP, you will do:

$ _ POST ['selectedValue'];

如果我是你，我宁愿如果有两个以上的条件。

if I were you, I would prefer a switch-case incase, there are more than 2 conditions.

示例：

switch($_POST['selectedValue']){
case 'Newest':
    // do Something for Newest
break;
case 'Best Sellers':
    // do Something for Best seller
break;
case 'Alphabetical':
    // do Something for Alphabetical
break;
default:
    // Something went wrong or form has been tampered.
}

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