<html><body>
<?php
if(isSet($andmed)){
if(ereg("[0-9]+", $andmed)){
echo "Andmed sobivad";
} else {
echo "Andmed ei sobi";
}
}
?><p>
<form>
Numbreid sisaldav lause: <input type="text" name="andmed">
</form>
</p>
</body></html>