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HTML drop-down menu retains the selected value after submission without returning the default value

高洛峰
高洛峰Original
2017-02-27 11:29:182152browse

This article mainly introduces how to retain the selected value without returning the default value after the HTML drop-down menu is submitted. Although the method is simple, it is more practical. Friends in need can refer to it

<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>

Each option must be With this script, if there are multiple, you can print them in a loop.

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