Question

我需要计算第一列的值。我收到的任何给定的.csv文件中可能存在这些ID，也可能不存在。所以我需要循环查看第一列的.csv文件，如果它不存在则将其添加到保持数组（$ PWSs），或者如果我已经添加了它，则增加该保持数组中的计数。 / p>

我有第一个循环使用fgetcsv（）..这适用于破解文件：

$PWSs = array();

$handle2 = fopen ($uploadfileandpath,"r");
while ($field2array = fgetcsv ($handle2, 130000, ",")) 
{
    // Here is where I would add value or increment $PWSs array
    while (?)
    {
        if ($field2array[0] != ?)
        {
            // Add or increment
        }
    }
}

这是实际数据。第一列有公共水系统的ID。我需要数数。

"00513","08/13/2009","090834311A","R","4","OR1000x6","N","N","E",,1,".73","COLILERT"
"00513","08/13/2009","090834312A","R","39","OR1000x6","N","N","E",,1,".35","COLILERT"
"00154","08/13/2009","090835401A","R","300 Falls Road","OR100016","N","N","E",,1,".10","COLILERT"
"95343","08/13/2009","090835601A","R","Room 1 Sink","OR1000x6","N","N","E",,1,,"COLILERT"
"94585","08/14/2009","090837701A","R","Kitchen","OR1000x6","N","N","E",,1,,"COLILERT"
"94704","08/14/2009","090837801A","R","Outside Tap","OR1000x6","N","N","E",,1,,"COLILERT"
"01430","08/14/2009","090838201A","R","100 Deer Park Ln OT","OR1000x6","N","N","E",,1,,"COLILERT"
"00625","08/14/2009","090839001A","R","Dano and N Rose","OR100016","N","N","E",,1,".35","COLILERT"
"00405","08/17/2009","090840301A","R","Westmont Drive","OR100016","N","N","E",,1,".28","COLILERT"
"01031","08/17/2009","090840401A","R","Unit 2 Faucet","OR100016","N","N","E",,1,,"COLILERT"
"00625","08/17/2009","090840601A","R","Luman Road","OR1000x6","N","N","E",,1,".35","COLILERT"
"00513","08/17/2009","090841001A","R","40","OR1000x6","N","N","E",,1,".18","COLILERT"
"00513","08/17/2009","090841002A","R","10","OR1000x6","N","N","E",,1,".16","COLILERT"

Answer 1

$fh = fopen('file.csv', 'rb');

$PWS = array();
while($row = fgetcsv($fh)) {
    $PWS[$row[0]]++;
}

基本上它会使用第一列值作为键来填充PWS，并在它们出现时递增它们。之后，鉴于上面的示例csv，您最终会得到

$PWS = array(
    '00513' => 4
    '00154' => 1
    '95343' => 1
    '94585' => 1
etc...
);

Answer 2

function get_pws()
{
    $PWSs = array();

    $handle2 = fopen ($uploadfileandpath,"r");
    while ($field2array = fgetcsv ($handle2, 130000, ",")) 
    {
        if(!in_array($field2array[0], $PWSs))
        {
            array_push($PWSs, array('key'=>$field2array[0], 'count'=>1));
        }
        else
        {
            foreach($PWSs as &$PWS)
            {
                if($PWS['key'] == $field2array[0])
                {
                    ++$PWS['count'];
                }
            }
        }
    }

    return $PWSs;
}

我实际上并没有运行并测试过这个脚本，所以希望它能够正常工作，这就是你要找的东西;）

编辑：感谢您指出dq。同样，我还没有测试过它（不是在安装了PHP的机器上），所以希望它仍然有用（如果它起作用的话）：P

Answer 3

您只需要一个 while 循环。你的外部while循环会在它到达eof时停止，因为fgetcsv（）将返回FALSE。

然后只测试列为NULL或“”为空字符串。如果给定数组中不存在该列，则应使用 isset（）以确保它在条件中首先存在。

我需要在csv列中获取值（分组）的计数

3 个答案: