Doe anders gewoon zo
PHP
<?php
echo "<form method='get' action='index.php?a=buycredits&p=shop'>";
if($data['health'] == "0"){
echo "<input type='submit' name='shop' value='Koop leven'>";
}
if($data['vermoord'] == "1"){
echo "<input type='submit' name='shop' value='Koop leven'>";
}
echo "</form>";
?>
(c) dit is de minste manier maar werkt waarschijnlijk wel.