<?php

function summiere(){
    $summe = 0;

    for($i = 0; $i < func_num_args(); $i++){
        $summe += func_get_arg($i);
    
    }
    echo "<p>$summe</p>\n";
}

summiere(1,5,7,2,4,2,5,6,4,9,7,5);

?>