sum_array.php

<?php


$data =  json_decode('[
    {
        "id": 1,
        "value1": 5,
        "value2": 10
    },
    {
        "id": 2,
        "value1": 50,
        "value2": 100
    },
    {
        "id": 1,
        "value1": 1,
        "value2": 2
    },
    {
        "id": 2,
        "value1": 15,
        "value2": 20
    },
    {
        "id": 3,
        "value1": 15,
        "value2": 20
    }
]');

//print_r(array_group_by($data,'id'));
print_r(array_sum_by($data,'id',['value1','value2']));
//print_r(array_sum(array_column($data,'value1')));

function array_sum_by($array,$group,$keys)
{
	 $groupeddata = array_group_by($array,$group);
	return  array_map(function($items) use($group,$keys) { 
		
		foreach($keys as $key)
		{
			$values[$key] = array_sum(array_column($items,$key));
		}
		$first = array_shift($items);
		if(is_object( $first ) && isset( $first->{ $group } )){
			$values = array_merge([ $group => $first->{ $group } ], $values);
		}elseif(isset($first[$group])){
			$values = array_merge([ $group => $first[$group] ], $values);
		}
		return $values;
	},$groupeddata); 
}

function array_group_by( array $array, $key )
	{
		if ( ! is_string( $key ) && ! is_int( $key ) && ! is_float( $key ) && ! is_callable( $key ) ) {
			trigger_error( 'array_group_by(): The key should be a string, an integer, or a callback', E_USER_ERROR );
			return null;
		}
		$func = ( is_callable( $key ) ? $key : null );
		$_key = $key;
		// Load the new array, splitting by the target key
		$grouped = [];
		foreach ( $array as $value ) {
			if ( is_callable( $func ) ) {
				$key = call_user_func( $func, $value );
			} elseif ( is_object( $value ) && isset( $value->{ $_key } ) ) {
				$key = $value->{ $_key };
			} elseif ( isset( $value[ $_key ] ) ) {
				$key = $value[ $_key ];
			} else {
				continue;
			}
			$grouped[ $key ][] = $value;
		}
		// Recursively build a nested grouping if more parameters are supplied
		// Each grouped array value is grouped according to the next sequential key
		if ( func_num_args() > 2 ) {
			$args = func_get_args();
			foreach ( $grouped as $key => $value ) {
				$params = array_merge( [ $value ], array_slice( $args, 2, func_num_args() ) );
				$grouped[ $key ] = call_user_func_array( 'array_group_by', $params );
			}
		}
		return $grouped;
	}