计算行中的空列

Question

我有一个属性 table，它有六列。用户上传的照片和图片名称存储在该列中。

现在我想计算每一行的空列数。

我已经可以做到了，但是代码看起来太长了，我想写出高效的代码，有没有办法高效地重写下面的代码。

while($data=$select->fetch()){ 

    $imagecounter=0;
    if ($data['property_image1'] !== "" && $data['property_image2'] !== "" && $data['property_image3'] !== "" && $data['property_image4'] !== "" && $data['property_image5'] !== "" && $data['property_image6'] !== "") {
     echo $imagecounter=6; 
    } else if ($data['property_image1'] !== "" && $data['property_image2'] !== "" && $data['property_image3'] !== "" && $data['property_image4'] !== "" && $data['property_image5'] !== "") {
     echo $imagecounter=5; 
    } else if ($data['property_image1'] !== "" && $data['property_image2'] !== "" && $data['property_image3'] !== "" && $data['property_image4'] !== "") {
     echo $imagecounter=4; 
    } else if ($data['property_image1'] !== "" && $data['property_image2'] !== "" && $data['property_image3'] !== "") {
     echo $imagecounter=3; 
    } else if ($data['property_image1'] !== "" && $data['property_image2'] !== "") {
     echo $imagecounter=2; 
    } else if ($data['property_image1'] !== "") {
     echo $imagecounter=1; 
    } 

}

Answer 1

你可以像下面那样做:-

while($data=$select->fetch()){ 
  $data1 = array($data['property_image1'],$data['property_image2'],$data['property_image3'],$data['property_image4'],$data['property_image5'],$data['property_image6']);
  $count = count($data1); // count of original array
  $count1 = count(array_filter($data1)); // remove empty indexes and count the values

  echo "empty columns number is :-".($count-$count1);
}

注意：- $count1 是 non-empty 个值的计数

Answer 2

试试这个代码

while($data=$select->fetch()):
    $imagecounter = 0;
    for($i=1; $i<=6; $i++)
        if(!empty($data["property_image$i"]))
            $imagecounter++;

    echo $imagecounter;
endwhile;

Answer 3

列名有规律吗？

假设是 'property_image{number}'

while($row=$result->fetch()) {
    $count = 0;
    for($i=0; $i<6; $i++) {
        if($row['property_image'.$i]==NULL)
            $count++;
    }
    echo "empty columns number is :-".($count);
}

代码未经测试。如果它不起作用请告诉我

计算行中的空列

Counting Empty Columns in Rows

php

counting