Sum Value by Id Array Multidimensional

gistfile1.txt

<?php

$data = array(
 array( '231', 'http://dalamislam.com/akhlaq/amalan-shaleh/cara-agar-tetap-istiqomah-di-jalan-allah', '1'),
  array( '231',  'http://dalamislam.com/akhlaq/amalan-shaleh/cara-agar-tetap-istiqomah-di-jalan-allah/', '2'),
 array(  '231', 'http://dalamislam.com/akhlaq/amalan-shaleh/cara-agar-tetap-istiqomah-di-jalan-allah/amp', '3'),
 array( '21221',  'http://dalamislam.com/akhlaq/amalan-shaleh/cara-agar-tetap-istiqomah', '4'),
 array( '1', 'http://dalamislam.com/akhlaq/amalan-shaleh/cara-agar-tetap-istiqomah-di-jalan-allah', '5'),
  array( '1',  'http://dalamislam.com/akhlaq/amalan-shaleh/cara-agar-tetap-istiqomah-di-jalan-allah/', '10'),
 array(  '2', 'http://dalamislam.com/akhlaq/amalan-shaleh/cara-agar-tetap-istiqomah-di-jalan-allah/amp', '15'),
 array( '2',  'http://dalamislam.com/akhlaq/amalan-shaleh/cara-agar-tetap-istiqomah', '5'),
);


$keluaran = [];
foreach ($data as $key => $point) {
  $id = $point[0];
  $permalink = $point[1];
  $permalinkin = explode("?",$permalink);
    if(strrpos($permalinkin[0], '/') == strlen($permalinkin[0]) - 1 ){
        $permal = substr($permalinkin[0], 0, -1);
    }
    if(  strpos($permalinkin[0], 'amp') !== false ){
        $permalinkin = explode("/amp",$permalinkin[0]);
    }
    array_push($keluaran, array( "id" => $id, "permalink" => $permalink, "pageview" => $point[2]));
}

$sum = array_reduce($keluaran, function ($a, $b) {
    isset($a[$b['id']]) ? $a[$b['id']]['pageview'] += $b['pageview'] : $a[$b['id']] = $b;  
    return $a;
});

function unique_multidim_array($array, $key) { 
    $temp_array = array(); 
    $i = 0; 
    $key_array = array(); 
    
    foreach($array as $val) { 
        $buffer = 0;
        if (!in_array($val[$key], $key_array)) { 
            $key_array[$i] = $val[$key]; 
            // $buffer = $buffer + $val['pageview'];
            // $val['pageview'] = $buffer;
            $temp_array[$i] = $val;
            
        } 
        $i++; 
    } 
    return $temp_array; 
} 
print_r(array_values(unique_multidim_array($sum,'id')));
?>