刷新页面后，请记住所选值

Question

In a page containing a form with select fields, I need to remember the previuos choice (if any) of, for example, the selected state. I want to do it via PHP embedded in JS, where I'm wrong?

<script>
<?php
if(isset( $_GET["state"] )){
$selected_state =  $_GET["state"];
?>
$("#state option[<?php echo $selected_state ?>]").attr("selected", "selected");
<?php } ?>
</script>

Thank you in advance!

Answer 1

Replace:

$("#state option[<?php echo $selected_state ?>]").attr("selected", "selected");

With:

$("#state option[value='<?php echo $selected_state ?>']").attr("selected", "selected");

---

The problem is with the jQuery selector #state option[SOMETHING] which checks if the element option has an attribute called SOMETHING, where you want to see if the value of an option is equal to SOMETHING so we use #state option[value='SOMETHING'].

You can find the jQuery selectors docs here: http://api.jquery.com/category/selectors/