Question

我目前有一个文本文件，如下所示：

0000001
0000002
0000003
0000004
0000005
0000006....

我使用下面的代码将1d数组转换为2d ..

$filename  = "surface.txt";
$fp = fopen($filename, "r");
while(!feof($fp)) {  
     $content = fread($fp, filesize($filename));
     $lines = explode("\n", $content);
   for ($i=0; $i<=$row; $i++){
   for ($j =0; $j<=$col; $j++){
      //echo $lines[$i*$col + $j]; 
      $matrix[$i][$j] = $lines[$i*$col + $j];
      //var_dump($matrix[i][j]); 
     }
    }
   }
 fclose($fp);

我的输出数组$ matrix打印所有NULL值。我已将var_dump（）放在循环中以查看它显示的内容。有趣的是，它正在读取所有值，但是，在最后一个值之后，它继续读取为空这也是值，最后使$ matrix为空（NULL）。我不知道如何解决这个问题。如果我不清楚如何解释输出，请在下面查看..

Array ( [0] => Array ( [0] => 0000001 ) )
Array ( [0] => Array ( [0] => 0000002 [1] => 0000002 ) )
Array ( [0] => Array ( [0] => 0000001 [1] => 0000002 [2] => 0000003 ) )

在最后几行中，我看到输出如下所示

  Array ( [0] => Array ( [0] => [1] => [2] => [3] => ) [1] => Array ( [0] => [1] => [2] =>   [3] => ) [2] => Array ( [0] => [1] => [2] => [3] => ) [3] => Array ( [0] => [1] => [2] => [3] => ) [4] => Array ( [0] => [1] => [2] => [3] => ) [5] => Array ( [0] => [1] => [2] => [3] => ) [6] => Array ( [0] => [1] => [2] => [3] => ) )

非常感谢任何帮助。

Answer 1

<?php
//asuming $row and $col are defined
//$row=5;
//$col=5;


$filename  = "surface.txt";

     $content = file_get_contents($filename);
     $lines=explode("\n",$content);
foreach ($lines as $rowNum=>$r)
{
$r=str_split($r);
if ($rowNum+1>$row)
break;    
if ($r===[""])
continue;
while (count($r)>$col)
{
array_pop($r);
}
$matrix[]=$r;
}
var_dump($matrix);

Answer 2

以下是我如何使用它

  $filename="surface.txt"
 $fp = fopen($filename, "r");
 $content = fread($fp, filesize($filename));
 $lines = explode("\n", $content);
 for ($i=0; $i<$row; $i++){
 for ($j =0; $j<$col; $j++){

  $matrix[$i][$j] = $lines[$i*$col + $j];
 }
 }

将1D数组转换为2D数组PHP

2 个答案: