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php:如何得到二维数组的元素之和?

arrays php

Naveed · 技术社区 · 14 年前

我想得到该行末尾每行的元素总数和每列末尾每列的元素总数。

例如:

我有一个数组,其数字值如下:

$twoDimArr = array(  array("1" , "2" , "3" , "4"),
                     array("1" , "2" , "3" , "4"),
                     array("1" , "2" , "3" , "4"),
                     array("1" , "2" , "3" , "4"),
                     array("1" , "2" , "3" , "4"),
                     array("1" , "2" , "3" , "4"),
                     array("1" , "2" , "3" , "4")

);

输出如下:

$twoDimArr = array(  array("1" , "2" , "3" , "4", "total" => "10"),
                     array("1" , "2" , "3" , "4", "total" => "10"),
                     array("1" , "2" , "3" , "4", "total" => "10"),
                     array("1" , "2" , "3" , "4", "total" => "10"),
                     array("1" , "2" , "3" , "4", "total" => "10"),
                     array("1" , "2" , "3" , "4", "total" => "10"),
                     array("1" , "2" , "3" , "4", "total" => "10"))
                     "columnTotal => "array("7" , "14" , "21" , "28", "70")

    );

输入数组: 行中的元素数量可能会有所不同,但每个行元素的数量都不会与其他行元素相同。输入数组中的索引可以是任何内容。

我已经对它进行了编码,它对我很有用,但是我对代码的数量不满意。可能有人会编码更高效,代码更少的解决方案。

谢谢

2 回复 | 直到 14 年前

Raphael Caixeta 14 年前

干得好

<?php

$twoDimArr = array(  array("1" , "2" , "3" , "4"),
                     array("1" , "2" , "3" , "4"),
                     array("1" , "2" , "3" , "4"),
                     array("1" , "2" , "3" , "4"),
                     array("1" , "2" , "3" , "4"),
                     array("1" , "2" , "3" , "4"),
                     array("1" , "2" , "3" , "4")

);  

$current = 0;
foreach($twoDimArr as $evaluate) {
    $total = 0;
    foreach($evaluate as $value) {
        $total = $total + $value;
    }
    $twoDimArr[$current]['total'] = $total;
    $twoDimArr['columnTotal'][] = $total;
    $current++;
}

print_r($twoDimArr);

?>

编辑它以包括列汇总。

Naveed 14 年前

这是我的解决方案:

function getTotalArray( $twoDimArr ) {

    if( !empty( $twoDimArr ) && is_array( $twoDimArr ) ) {

        // Create an array to store column total
        $myArr = array();
        for( $i = 0; $i < count( end($twoDimArr) ); $i++ ) {
            $myArr[$i] = 0; 
        }


        foreach( $twoDimArr as $key => $value ) {

            $colCount = 0;
            $rowCount = 0;
            $i = 0;

            foreach( $twoDimArr[$key] as $key1 => $value1 ) {
                $colCount += $value1;
                $myArr[$i] += $value1;
                $i++;
            }

            // Add column total
            $twoDimArr[$key]['total'] = $colCount;
        }

        // Last column total that is created while row elements sum
        $myArr['totaloftotal'] = 0;
        foreach( $twoDimArr as $key2 => $values3 ) {
            $myArr['totaloftotal'] += end($twoDimArr[$key2]);
        }

        $twoDimArr = array_merge($twoDimArr, array( "total" => $myArr) );

        return $twoDimArr;

    } else {

        $twoDimArr = array();
        return $twoDimArr;
    }

} // end function