Not exactly like that. You'll need to close php tags before adding other scripts. This is how it should look like:
Code:
<?php
if ($request_type != 'SSL') {
?>
<script type="text/javascript">
/* <![CDATA[ */
var google_conversion_id = xxxxxxxxxx;
var google_conversion_language = "en";
var google_conversion_format = "3";
var google_conversion_color = "ffffff";
var google_conversion_label = "xxxxxxxxxx";
var google_conversion_value = 0;
/* ]]> */
</script>
<?php
}
?>
I tried to point out what you were missing in red.