In a form form, there are multiple select, and after submitting to the background file, how to get to the selected values of these several select?

In a form form, there are multiple select, after submitting to the background file, how to get to the selected values of these several select??

In a form form, there are multiple select, after submitting to the add.php file, how to get to the value of the two select selected??

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$_post[' Selteaid '];
$_post[' Selclaid '];


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Is the action parameter in the form form useful?
If useful:
if (Isset ($_get[' addteahcer ')) {
echo "drop-down menu 1-->>";p rint_r ($_post[' selteaid ');
";
echo "drop-down menu 1-->>";p rint_r ($_post[' selclaid ');
";
}
The premise is that the drop-down menu in your front-end page has the selected value:
while ($row = Mysql_fetch_array ($result 2)) {if ($row [' id '] = = 1) {echo "" . $row [' id ']. ""; } else{echo "" . $row [' id ']. ""; } }
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The Name property of the different select is set differently, and then the $_post is used to obtain the
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Backstage $_post[' A ']$_post[' B ']$_post[' C ']