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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?
In HTML, how can the drop-down menu retain the selected value after submission and not return to the default value?
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['select']) ? $_GET['select'] : ''; ?> <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 == 'option1' ? 'selected' : '' ?>>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!
Related reading:
How to use the head structure in HTML
How to use vertical-align to make input elements and img element alignment
The above is the detailed content of In HTML, how can the drop-down menu retain the selected value after submission and not return to the default value?. For more information, please follow other related articles on the PHP Chinese website!
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