Sommare array

[snowpunk]

Ciao,

io ho un array :

$prova = array(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28); 

e vorrei sommare tutti questi numeri, come faccio???

Grazie

[Shenk87]

$somma = 0;
foreach ($prova as $n)
$somma = $somma + $n;

echo $somma;

[snowpunk]

Mi da un errore:

Warning: Invalid argument supplied for foreach()


Come mai????

[nicola75ss]

Il codice che ti ha scritto Shenk mi sembra corretto.

Comunque c'è anche la funzione array_sum

$totale = array_sum($prova);

[snowpunk]

$dat__calendar["2007"]=array(array(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0),array(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28),array(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0),array(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0),array(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0),array(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0),array(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0),array(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0),array(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0),array(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0),array(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0),array(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0));

for ($i = 0; $i <= 11; $i++)
{

$data = mktime(0,0,0,date('m')-$i,date('d'), date('Y'));

$anno = date("Y", $data);
$mese = date("m", $data)-1;
$giorno = date("d", $data)-1;


echo "


";
$somma = array_sum($dat__calendar[$anno][$mese]);
echo $somma . '
';
} 

Non so dove sbaglio....

[snowpunk]

ho risolto, grazie

Mancava l' array...

[Leilond]

Hai il calendario definito solo per il 2007

Usando questa istruzione

$mese = date("m", $data)-1; 

quando $mese è minore di uno (ed essendo ora marzo lo sarà per qualsiasi valore di $i >= 3) il la funzione mktime ovviamente fa scalare un anno indietro e quindi vai a cercare
programma cerca $dat_calendar[2006][$mese] che non è valorizzato