Invalid argument supplied for foreach()

[c4n10]

Hello all,

 

I am working on a site which is returning "Warning: Invalid argument supplied for foreach()"

 

The function that is returning the warning is:

 

function currentworkers() {
                $currentworkers = 0;
                if (!($currentworkers = getCache("pool_workers"))) {
                        $uwa = $this->workerhashrates();
                        foreach ($uwa as $key => $value) {
                                if ($value > 0)
                                        $currentworkers += 1;                  $
                        }
                        setCache("pool_workers", $currentworkers, 1800);
                }
                return $currentworkers;
	}

 

 

Any help is greatly appreciated, thanks!!!

[Barand]

It looks as though $this->workerhashrates() is not returning an array

[c4n10]

It looks as though $this->workerhashrates() is not returning an array

 

You are absolutely correct, turns out the backend code we are using hasn't been writing to the db so there has been no info to retrieve so it is returning an empty array, thank you for the help!

[davidannis]

You can verify what Barand said is true with:

$testme= gettype($uwa)
echo $testme;
if ($testme=='array') {
print_r($uwa);
}

[Barand]

or simply

 

 

var_dump($uwa);