如何優化很多if循環？

Question

這正好12倍：

if (isset($this->month1)) { 
     array_push($monthly, "Month 1: " . $this->month1) 
    } 

    if (isset($this->month2)) { 
     array_push($monthly, "Month 2: " . $this->month2) 
    } 

    if (isset($this->month3)) { 
     array_push($monthly, "Month 3: " . $this->month3) 
    } 

反正優化呢？

Answer 1

你可以這樣做：

foreach (range(1, 12) as $i) { 
    $param = 'month' . $i; 
    if (isset($this->$param)) { 
     array_push($monthly, "Month $i: " . $this->$param); 
    } 
} 

希望這有助於！