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How to operate two-dimensional array matrix transpose in PHP
- php中世界最好的语言Original
- 2017-12-20 16:25:511851browse
In some cases we need to implement matrix transposition of array. Today I will bring you an example code of PHP matrix transposition. Let's take a look at it together.
<?php
$arr1 = array(
array(1,2,3),
array(4,5,6),
array(6,7,8),
array('a','b','c')
);
echo '脚本之家测试结果:<br><br>';
echo '矩阵转置前:<br>';
for($i=0;$i<count($arr1);$i++){
for($j=0;$j<count($arr1[$i]);$j++){
echo $arr1[$i][$j].' ';
}
echo '<br>';
}
echo '矩阵转置后:<br>';
for($i=0;$i<count($arr1);$i++){ //确定转置列数
for($j=0;$j<count($arr1[$i]);$j++){ //确定转置行数
$arr2[$j][$i] = $arr1[$i][$j]; //将矩阵1的“第i行第j列”的值 赋给 矩阵2的“第j行第i列”
}
}
for($j=0;$j<count($arr2);$j++){ //遍历数组2
for($i=0;$i<count($arr2[$j]);$i++){
echo $arr2[$j][$i].' ';
}
echo '<br>';
}
?>I believe you have mastered the methods after reading these cases. For more exciting information, please pay attention to other related articles on the php Chinese website!
Related reading:
phpTwo-dimensional arraySort—Default natural sort
phpTwo-dimensional arrayImplementation example of assignment and traversal function
php implementationTwo-dimensional arrayExample of quick sorting algorithm
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