SUM高於0

Question

即時通訊數做作業，我已經試着這樣做代碼，但它似乎不是很好，我的作業是讓那些高於0

<?PHP 
$b=array (1,2,-3,0,7,25,0,42,1,-10); 
$s=0; $BUB=0; 
for($BUB=0;$BUB=10;$BUB++) 
{ 
    if($b>0){ 
     $s=$s+$b;} [$bub=0]; 
     $BUB++; 

} 
echo "suma je $s" ; 

?> 

Answer 1

$sum = 0; 
foreach(array (1,2,-3,0,7,25,0,42,1,-10) as $num) { 
    if($num > 0) { 
    $sum += $num; 
    } 
} 

Answer 2

數之和

$b=array (1,2,-3,0,7,25,0,42,1,-10); 

$r = array_sum(
    array_filter(
     $b, 
     function ($value) { 
      return $value > 0; 
     } 
    ) 
); 
var_dump($r); 

或

$b=array (1,2,-3,0,7,25,0,42,1,-10); 

$r = array_reduce(
    $b, 
    function($adder, $value) { 
     return $adder += ($value > 0) ? $value : 0; 
    } 
); 
var_dump($r);