How to find the sum of two-dimensional array in php

Summing method: 1. Use foreach to traverse the outer array elements of the two-dimensional array, the syntax is "foreach($arr as $v){//loop body}"; 2. In the loop body, use is_array() determines whether the outer element is an array type. If so, use array_sum() to find the sum of the elements of the inner array and add it to the elements of the outer array. The syntax "if(is_array($v)){ $sum =array_sum($v);}else{$sum =$v;}".

The operating environment of this tutorial: windows7 system, PHP8.1 version, DELL G3 computer

php seeks 2D Array sum method

1. Use the foreach statement to loop through the outer array elements of the two-dimensional array

foreach($arr as $v){
//循环体代码
}

Traverse the given $ arr array, assign the value of the current outer array to $v in each loop.

2. In the loop body, use the is_array() function to determine whether the outer element is an array type, and use the "=" operator to sum

• If it is not an array type, add and sum the outer elements that are not.

• If it is an array type, use the array_sum() function to calculate all the elements in the inner array The sum of the elements is added to the sum of the outer elements.

if(is_array($v)){
	$sum+=array_sum($v);
}else{
	$sum+=$v;
}

Complete implementation code:

<?php  
header("content-type:text/html;charset=utf-8");
$arr = array(1,2,3,array(4,5,6),7,8,array(9,10)); 
var_dump($arr);
$sum=0;
foreach($arr as $v){
	if(is_array($v)){
		$sum+=array_sum($v);
	}else{
		$sum+=$v;
	}
}
echo "二维数组的和为：".$sum;
?>

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