First code is fine but textfield give back all php tag
<td><?php print($code_verification);?>
<input type="text" name="packaging_code" id="packaging_code" value="<?=$code_verification?>" />
First code is fine but textfield give back all php tag
<td><?php print($code_verification);?>
<input type="text" name="packaging_code" id="packaging_code" value="<?=$code_verification?>" />
Change:
value="<?=$code_verification?>"
to:
value="<?php echo $code_verification; ?>"
The first line would work if your server had short_open_tags enabled.