单击提交按钮时，使用$ _POST从<select>字段获取输出

问题描述：

I'm making a rock paper scissors game and players need to choose if they want to play best out of 1, 3, 5 or 7 before they start the game and i need it to work with a Select field and a submit button.

I am very new to the select tag but it would suit me best if the selected number could be exctracted with $_POST or $_GET

This is the form:

<form method="post">
<h1>Best out of </h1>
<select>
    <option value="one">1</option>
    <option value="three">3</option>
    <option value="five">5</option>
    <option value="seven">7</option>
</select>
<input type="submit" name="start" value="START" />
</form>

This is the PHP:

<?php
    if(isset($_POST['start']) && isset($_POST['one']))
    {
        echo "do something 1";
    };
    if(isset($_POST['start']) && isset($_POST['three']))
    {
        echo "do something 2";
    };
    if(isset($_POST['start']) && isset($_POST['five']))
    {
        echo "do something 3";
    };
    if(isset($_POST['start']) && isset($_POST['seven']))
    {
        echo "do something 4";
    };
?>

我正在制作一个石头剪刀游戏，玩家需要选择是否想要在1中发挥最佳效果，在他们开始游戏之前我需要使用3,5或7，我需要它来使用选择字段和提交按钮。 p>

我对选择标签很新，但它最适合我如果所选的号码可以用$ _POST或$ _GET p>提取

这是表格： strong> p>

   ＆lt; form method =“post”＆gt; 
＆lt; h1＆gt; Best of＆lt; / h1＆gt; 
＆lt; select＆gt; 
＆lt; option value =“one”＆gt; 1＆lt; / option＆gt; 
＆lt; option  value =“three”＆gt; 3＆lt; / option＆gt; 
＆lt; option value =“five”＆gt; 5＆lt; / option＆gt; 
＆lt; option value =“seven”＆gt; 7＆lt; / option＆gt; 
＆lt; / 选择＆gt; 
＆lt; input type =“submit”name =“start”value =“START”/＆gt; 
＆lt; / form＆gt; 
  code>  pre> 
 
   这是PHP： strong>  p> 
 
 
 ＆lt;？php 
 if（isset（$ _ POST ['start']）＆amp;＆amp; isset（$ _ POST [  'one']））
 {
 echo“做一些事情1”; 
  }; 
 if（isset（$ _ POST ['start']）＆amp;＆amp;  isset（$ _ POST ['three']））
 {
 echo“do something 2”; 
}; 
 if（isset（$ _ POST ['start']）＆amp;＆amp; isset（$ _ POST [  'five']））
 {
 echo“做一些事情3”; 
}; 
 if（isset（$ _ POST ['start']）＆amp;＆amp; isset（$ _ POST ['seven']）  ）
 {
 echo“做点什么4”; 
}; 
？＆gt; 
  code>  pre> 
  div>

答

Give your select a name attribute

<form method="post">
<h1>Best out of </h1>
<select name="my_select">
    <option value="one">1</option>
    <option value="three">3</option>
    <option value="five">5</option>
    <option value="seven">7</option>
</select>
<input type="submit" name="start" value="START" />
</form>

After submitting your form in the PHP script you can get select value using $_POST array with index my_select ( name attribute value of the select element):

<?php
if(isset($_POST['start']) && isset($_POST['my_select']))
{
    if($_POST['my_select'] === 'one'){}
    ....
}
?>

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