How to duplicate arrays and sum them in php

Methods for deduplicating arrays and summing: 1. Use array_unique() to deduplicate, syntax "array_unique(array)", return a new array without duplicate values; 2. Use array_sum() to perform summation , the syntax "array_sum (array after deduplication)" returns the sum of all values ​​in the deduplication array.

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

php deduplication array The sum can be implemented in two steps:

Step 1. Use the array_unique() function to deduplicate the array

array_unique( ) function is used to remove duplicate values ​​from an array. If two or more array values ​​are the same, only the first value is retained and the other values ​​are removed.

Note: The retained array will retain the key type of the first array item.

<?php 
header("content-type:text/html;charset=utf-8");
$array = array(1,2,3,3,4,2,3,5,6,4,5,7,8,9,10); 
var_dump($array);       
 
$result = array_unique($array);
echo "删除重复元素后的数组";
//var_dump(array_values($filtered_array)); 
var_dump($result);
?>

Step 2, use array_sum() to find the sum

$sum=array_sum($result);
echo "数组去重后求和：".$sum;

Description:

array_sum($arr) The function is used to calculate the sum of all elements in the array

• If all elements of the array arr are integers , returns an integer value; if one or more of the values ​​is a floating-point number, a floating-point number is returned.

• If there are non-numeric elements in the array arr, PHP will try to convert them to a numeric value, and if the conversion fails, it will be treated as a 0 value.

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