Question

有关该功能的信息：目前它抓取最后20行，并根据行中请求的列显示信息。

我想做什么

我想忽略包含相同列5和13的行。示例:(应忽略下面的两行，因为第一行中的第5列与第13行匹配，第二行与第一行相同，因为第5列中的第一个名称与第13列的名称相匹配）

1,42,16, 201,stackoverflow_user, 1, 6762160, 39799, 9817242, 6762160, 39884, 10010545,stackoverflow_user, 2, 1351147, 1165, 483259, 1351147, 1115, 241630, 0 
1,46,27, 201,[stackoverflow_user | stackoverflow_userother], 1, 4078465, 286991, 1594830, 4078465, 287036, 1643156,stackoverflow_user, 2, 1357147, 1115, 241630, 1357147, 1065, 120815, 0

因此，脚本应该抓住额外的行并忽略列匹配的行，直到它可以显示20行有效行。

以下是我的实际功能：

    function DMMRankings()

    {
        # read a file into an array
        $lines = file('C:/path/to/file.txt', FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);

        # take the last 20 lines of the file -- i.e. the last 20 values in the array
        $last_ten = array_slice($lines, -20);

        #create an array for the output
        $n = 1;
        $content = '';

        foreach ($last_ten as $l) {
            # treat the data as comma-separated values
            $arr = explode(",", $l);
            # if col 5 has multiple values, take the first one
            if (preg_match("/\[(.+?) \|/", $arr[4], $matches)) {
            $arr[4] = $matches[1];
            }
            # store the data we want in an output array.
            $data = array('rank-pos' => $n++, 'rank-name' => $arr[4], 'rank-dmuser' => $arr[12]);
        $content .= Template::Load('rankinguserdm-' . ($n % 2 == 1 ? 2 : 1), $data);
        }

        $this->content = Template::Load('user_rankingsdm', array('rankings' => $content));
    }

请帮我解决一下我目前的功能如何做到这一点。谢谢！

Answer 1

这里有一些代码可以测试col 5和col 13是否相同，如果是，则跳过该行。它使用累加器来计算有效行数。请参阅代码以获取有关它正在做什么的评论。

# read a file into an array
$lines = file('C:/path/to/file.txt', FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);

# flip our array over so the last lines of the file are first.
$lines = array_reverse($lines);
$n = 0;
$wanted = 20; # or however many lines you want.
$content = '';

foreach ($lines as $l) {
   # treat the data as comma-separated values
   $arr = explode(",", $l);
   # if col 5 has multiple values, take the first one
   if (preg_match("/\[(.+?) \|/", $arr[4], $matches)) {
       $arr[4] = $matches[1];
   }
   # is arr[4] the same as arr[12]?
   if ($arr[4] !== $arr[12]) {
       # these two are not equal, so use these values
       $data = array('rank-pos' => $n++, 'rank-name' => $arr[4], 'rank-dmuser' => $arr[12]);
       $content .= Template::Load('rankinguserdm-' . ($n % 2 == 1 ? 2 : 1), $data);
   }
   # have we got enough data?
   if ($n === $wanted) {
       break;
   }
}
# check if we got enough data from the loop
if ($n < $wanted) {
    die("We couldn't get enough data!");
}

Answer 2

要获得20个有效行，只需保持循环直到你有20个。

$lastline=count($lines);
$dsp=0;

while(dsp<20){
      //check to see if there are any more lines
      if(!$lines[$lastline-$dsp]){
              echo 'oops, we ran out of lines';
              break;}
      $l=$lines[$lastline-$dsp];
        # treat the data as comma-separated values
        $arr = explode(",", $l);
        # if col 5 has multiple values, take the first one
        if (preg_match("/\[(.+?) \|/", $arr[4], $matches)) {
            $arr[4] = $matches[1];
            }
        //skip if 5==13
        if($arr[4]==$arr[12])continue;

        //else: add one to counter
        $dsp++;

        # store the data we want in an output array.
        $data = array('rank-pos' => $n++, 'rank-name' => $arr[4], 'rank-dmuser' => $arr[12]);
    $content .= Template::Load('rankinguserdm-' . ($n % 2 == 1 ? 2 : 1), $data);
    }

如何根据此函数中的特定语句忽略行，该函数从文本文件中读取数据？

2 个答案: