how i constraint php cost variable?


i'm generating ton xml upheld an api post non-static user click form button. i also wish means arrangement user xml before hand.



the formula sorta following structure:



<?php
    $lots = "php";
?>

<xml>
    <morexml>

<?php
    while(){
?>
    <somegeneratedxml>
<?php } ?>

<lastofthexml>

<?php ?>

<html>
    <pre>
      xml user preview
    </pre>

    <form>
        <input id="xml" value="thexmlagain" />
    </form>
</html>


my xml being generated few while loops stuff. following needs shown twin places (the preview form value).



my doubt is. i constraint generated xml non-static whatever i wholly have beget once following only imitation out apposed generating inside preview following again inside form value?



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