After submitting the html drop-down menu, the selected value is retained instead of returning to the default value

After submitting the html drop-down menu, the selected value is retained instead of returning to the default value

Copy code
The code is as follows:

<html>
<body>
<?php
// Get the select value
$select_value = isset($_GET['select']) ? $_GET['select'] : '';
?>
<form action="?">
<select name="select">
<option value="">default</option>
<option value="option1" <?php
// If the value obtained above is the same as the value in this option,
// Print selected, making this option selected by default
echo $select_value == 'option1' ? 'selected' : ''
?>>option1</option>
</select>
<input type="submit" value="submit" />
</form>
</body>
</html>

This script should be added to each option, and if there are multiple options, they can be printed in a loop.

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