Question

我有一个列表（data1.php），其中包含如下数据：

06/26/2015,33.51718,-81.71856,0.0,4001,15:39:57,39256,1,0.0,13.6,
06/26/2015,33.51721,-81.71858,0.0,4001,15:40:57,39256,1,0.0,13.7,
06/26/2015,33.51720,-81.71860,0.0,4001,15:41:57,39256,1,0.0,13.6,
06/26/2015,33.51719,-81.71858,0.0,4001,15:42:58,39256,1,0.0,13.7,
06/26/2015,33.51720,-81.71860,0.0,4001,15:43:58,39256,1,0.0,13.6,

我正在尝试仅检索第2和第3个数据（lat和long）。输出文件的结果如下：

Lat:33.51718
Long:-81.71856
Lat:33.51720
Long:-81.71860
Lat:33.51720
Long:-81.71860

它正在跳过其他所有行。这是我的代码。请帮忙。

<?php
    $fn = fopen("data1.php",'r') or die("fail to open file");
    $fp = fopen('output.php', 'w') or die('fail to open output file');
    while($row = fgets($fn)) {
      echo fgets($fn). "<br";
      $num = explode(",", $row);

      $lat = $num[1];
      $long =  $num[2];
       echo "<p>Lat: {$lat}</p>";
      echo "<p>Long: {$long}</p>";

      fwrite($fp, "Lat:$lat\n");
      fwrite($fp, "Long:$long\n");

    }
    fclose($fn);
    fclose($fp);
?>

Answer 1

你的问题就在这里：

 while($row = fgets($fn)) {
echo fgets($fn). "<br";

您从文件中读取1行，然后立即读取并回显另一行而不实际处理它。删除回声，你应该没事。

Answer 2

试试这个：

<?php
$fn = fopen("data1.php",'r') or die("fail to open file");

$fp = fopen('output.php', 'w') or die('fail to open output file');

$stop = "0";

while($row = fgets($fn)) {


$num = explode(",", $row);


$lat = $num[1];
$long =  $num[2];
if($stop == "1" or $stop == "2"){

echo "<p>Lat: {$lat}</p>";
echo "<p>Long: {$long}</p>";

fwrite($fp, "Lat:$lat\n");
fwrite($fp, "Long:$long\n");
}else{}

$stop++;
   }
fclose($fn);
fclose($fp);

  ?>

php逐行读取并检索数据

2 个答案: