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In HTML, how can the drop-down menu retain the selected value after submission and not return to the default value?

php中世界最好的语言Original: 2018-01-27 09:58:193303browse

This time I will show you how to keep the selected value of the drop-down menu without returning to the default value after submission in HTML. What are the precautions for retaining the selected value of the drop-down menu without returning to the default value after submission in HTML? The following is a practical case, let’s take a look.

The code is as follows:

<html> 
<body> 
<?php 
// 获取select值 
$select_value = isset($_GET[&#39;select&#39;]) ? $_GET[&#39;select&#39;] : &#39;&#39;; 
?> 
<form action="?"> 
<select name="select"> 
<option value="">default</option> 
<option value="option1" <?php 
// 如果在上面获取的值和这个option里的值一样， 
// 就打印selected，让这个option默认被选中 
echo $select_value == &#39;option1&#39; ? &#39;selected&#39; : &#39;&#39; 
?>>option1</option> 
</select> 
<input type="submit" value="submit" /> 
</form> 
</body> 
</html>

I believe you have mastered the methods after reading these cases. For more exciting information, please pay attention to other related articles on the php Chinese website!

In HTML, how can the drop-down menu retain the selected value after submission and not return to the default value?

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