How to implement two-dimensional array rotation in php-PHP Problem-php.cn

How to implement two-dimensional array rotation in php

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Release： 2023-03-14 13:08:02

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php method to implement two-dimensional array rotation: 1. Create a PHP sample file; 2. Define a two-dimensional array; 3. Define an array to place the transposed data; 4. Implement it through for loop traversal Just transpose the two-dimensional array.

How to implement two-dimensional array rotation in php

#The operating environment of this article: Windows 7 system, PHP version 7.4, Dell G3 computer.

How to implement two-dimensional array rotation in php?

PHP two-dimensional array rectangular transposition example

<?php
   
  //二维数组转置
  //定义一个二维数组
 
  $arr =array(array(1,2,3),array(4,5,6));
 
  //定义一个数组来放置转置的数据
  $arr1=array();
 
  //转置前遍历
  echo "转置前:<br/>";
  for($i=0;$i<count($arr);$i++){
     
    for($j=0;$j<count($arr[$i]);$j++){
     
      echo $arr[$i][$j];
       
    }
    echo "<br/>";
  }
 
  echo "转置前后:<br/>";
  //确定装置后的行数
  for($j=0;$j<count($arr[0]);$j++){
    $arr1[$j]=array();
  }
  for($i=0;$i<count($arr);$i++){
     
    for($j=0;$j<count($arr[$i]);$j++){
     
      $arr1[$j][$i]= $arr[$i][$j];
      //echo $arr;
    }
  }
 
  //转置后遍历:
  for($k=0;$k<count($arr1);$k++){
     
    for($l=0;$l<count($arr1[$k]);$l++){
     
      echo $arr1[$k][$l];
    }
    echo "<br/>";
  }
?>

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