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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