TOPIC:

<form method="post" action="https://xxx.weclapp.com/webapp/seam/resource/rest/web2lead?charset=UTF-8" accept-charset="UTF-8">
<label for="idWC_company_name">Firma</label><input type="text" id="idWC_company_name" name="company_name" maxlength="1000" /><br />
<label for="idWC_lastName">Nachname</label><input type="text" id="idWC_lastName" name="lastName" maxlength="1000" /><br />
<input type="hidden" name="honeypot" value="" /><br />
<input type="hidden" name="token" value="xyz" /><br />
<input type="submit" value="Senden" /></form>

$this->execPieceByName('ff_InitLib');
echo '
<form  method="post"  action="https://xxx.weclapp.com/webapp/seam/resource/rest/web2lead?charset=UTF-8" accept-charset="UTF-8">
     <input type="hidden" name="company_name" id="idWC_company_name" value="'.htmlentities( ff_getSubmit('idWC_company_name') ).'"/>
     <input type="hidden" name="lastName" id="idWC_lastName" value="'.htmlentities( ff_getSubmit ('idWC_lastName') ).'"/>
   <input type="hidden" name="honeypot" value="" />
    <input type="hidden" name="token" value="xyz" />
</form>
<script>
     document.myresubmit.submit();
</script>
';
exit;

<form  method="post"  action="https://xxx.weclapp.com/webapp/seam/resource/rest/web2lead?charset=UTF-8" accept-charset="UTF-8">
     <input type="hidden" name="company_name" id="idWC_company_name" value="hhh"/>
     <input type="hidden" name="lastName" id="idWC_lastName" value="Hh"/>
   <input type="hidden" name="honeypot" value="" />
    <input type="hidden" name="token" value="xyz" />
</form>
<script>
     document.myresubmit.submit();
</script>