error with array()

sayma

hi all,
i tried to call an array like this :

$array = array(3,4);
echo $tt= array_sum($array);

but it showes an error like bellow :

Fatal error: Call to unsupported or undefined function array_sum()

any body here to help me

Anon

first confirm you are running a PHP version that supports the function, according to the manual it was added in v4.04

I did a quick test and its work with the current v4.1.0 builds

mithril

What version of PHP are you using? array_sum() is not supported in versions earlier than 4.0.4.

-geoff

sayma

thanks for the information. Actually i'm working on php 3 versions.

mithril

Well, that'd explain it🙂 The second line (right below the function name) of every function reference in the manual tells you what versions the function is supported in.

-geoff

Anon

Since php 3.0 doesn't support array_sum(), you'll have to upgrade to newer version or write array_sum() yourself.

function my_array_sum($array)
{
$sum=0;
for($i=0; $i<count($array); $i++)
if(ctype_digit($array[$i]))
$sum+=$array[$i];
else
return -1;
}

sayma

thanks but still have the follwing error with my code ...

$tsel=("select AcctSessionTime from new_acct");
$tssel=mysql_query($tsel) or die("Failed to perform the action.");
while ($trow=mysql_fetch_array($tssel))
{
$mhr=$trow["AcctSessionTime"];

function my_array_sum($mhr)
{
$sum=0;
for($i=0; $i<count($array); $i++)
if(ctype_digit($array[$i]))
$sum+=$array[$i];
else
return -1;
}
}

please tell me where is the problem.

sayma

Anon

The problem is that you don't know how to implement functions.

You do not declare a function inside a while loop. Plus, why do you need array_sum()???

Seems to me that you code, could be rewritten as

$sum=0;
while ($trow=mysql_fetch_array($tssel))
$sum+=$trow["AcctSessionTime"];

You don't need array_sum to be used within while loop because you are fetching only one value at a time... So if you pass one value as an array -> that's incorrect, because if array contains only one value, then the sum would be that one value.