<?php //1、提取a.txt文件内容 $str = file_get_contents("a.txt"); //2、将str里面的内容转换成二维数组 $arr1 = preg_split("/\n/", $str); for ($i=0;$i<count($arr1);$i++){ $arr2[$i] = preg_split("/,/", $arr1[$i]); } print_r($arr2); //3、获取新数组的行列数 //新数组arr3的行数为原数组arr2的列数 $rows = count($arr2[0]); //新数组arr3的列数为原数组arr2的行数 $columns = count($arr2); //原数组arr2的行数 $oldrows = count($arr2); echo $oldrows; for ($i=0;$i<$rows;$i++){ for ($j=0;$j<$columns;$j++){ $x = $oldrows-$j-1; $arr3[$i][$j] = preg_replace("/(\n|\r)/", "", $arr2[$x][$i]); } } // foreach ($arr3 as $a){ // print_r($a);echo " "; // } $result = ""; foreach ($arr3 as $a){ for ($i=0;$i<count($a);$i++){ if ($i == count($a)-1){ $result = $result.$a[$i]."\n"; }else { $result = $result.$a[$i].","; } } } file_put_contents("result.txt", $result);

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