How to get multiple selected values ​​in dropdown list using php

In PHP we can use the form processing method and foreach loop to retrieve the selected values ​​in PHP, and then output these selected values. The following article will introduce to you how to use php to obtain multiple selected values ​​​​in a drop-down list. [Video tutorial recommendation: PHP tutorial]

The following is an example of how to use php to obtain multiple selected values ​​in a drop-down list.

HTML code: First use HTML to create the selection box.

<form method = &#39;post&#39; action = "demo.php">  
        <h4>选择课程</h4> 
          
        <select name = &#39;subject[]&#39; multiple size = 6>   
            <option value = &#39;英语&#39;>英语</option> 
            <option value = &#39;数学&#39;>数学</option> 
            <option value = &#39;计算机&#39;>计算机</option> 
            <option value = &#39;物理学&#39;>物理学</option> 
            <option value = &#39;化学&#39;>化学</option> 
            <option value = &#39;经济学&#39;>经济学</option> 
        </select> 
        <input type = &#39;submit&#39; name = &#39;submit&#39; value =&#39;提交&#39;> 
</form>

Note: If you want to select multiple values, it depends on the operating system and browser

● Window operating system: Ctrl key and mouse click

● mac operating system: command key mouse click

Rendering:

PHP code: Use PHP's form processing method and loop to retrieve in PHP Selected values, and then output these selected values.

<?php 
      
    // 检查表单是否提交成功
    if(isset($_POST["submit"]))  
    { 
        // 检查是否选中选项
        if(isset($_POST["subject"]))  
        { 
            // 检索每个选中选项
            foreach ($_POST[&#39;subject&#39;] as $subject)  
                print "你选择了 $subject<br/>"; 
        } 
    else
        echo "请先选中一个选项 !!"; 
    } 
?>

Rendering:

The above is the entire content of this article, I hope it will be helpful to everyone's study. For more exciting content, you can pay attention to the relevant tutorial columns of the PHP Chinese website! ! !

The above is the detailed content of How to get multiple selected values ​​in dropdown list using php. For more information, please follow other related articles on the PHP Chinese website!