PHP Sum Multiple Array Values

Question

How to sum multidimensional array values then grouping with date as my code. If any PHP code what should I try please tell me.

Please see the array code:

$array = array (

    0  => array(
        'date'          => '2015-02-06 10:42:39',
        'visit'         => 1,
        'bounce'        => 0
        ),

    1  => array(
        'date'          => '2015-02-06 13:23:21',
        'visit'         => 1,
        'bounce'        => 1
        ),

    2  => array(
        'date'          => '2015-02-07 04:11:42',
        'visit'         => 1,
        'bounce'        => 1
        ),

    3  => array(
        'date'          => '2015-02-08 11:35:28',
        'visit'         => 1,
        'bounce'        => 1
        ),

    4  => array(
        'date'          => '2015-02-08 15:12:09',
        'visit'         => 1,
        'bounce'        => 1
        ),

    5  => array(
        'date'          => '2015-02-09 15:12:09',
        'visit'         => 1,
        'bounce'        => 0
        ),

);

The result I expect must be when I do foreach:

date            visit       bounce
2015-02-06      2           1
2015-02-07      1           1
2015-02-08      2           2
2015-02-09      1           0

Here is the code what I've tried. But it just return the date count only.

$items = array_column($array, 'date');
$preg = preg_quote('2015-02-06', '~');
$result = preg_grep('~' . $preg . '~', $items);
echo 'Date <br/>' . count($result);

Please help, thank you in advanced.

Answer 1

You can create a new array:

$newArr = [];

foreach($array as $arr){
    $d = (new DateTime($arr['date']))->format('Y-m-d');
    $newArr[$d] = [
        "visit" => isset($newArr[$d]['visit']) ? $newArr[$d]['visit'] += $arr['visit'] : $arr['visit'],
        "bounce" => isset($newArr[$d]['bounce']) ? $newArr[$d]['bounce'] += $arr['bounce'] : $arr['bounce']
    ];
}

echo "<pre>";
var_dump($newArr);
echo "</pre>";

Above returns a nice formatted array which you can easily read out in the example you posted:

array(4) {
  ["2015-02-06"]=>
  array(2) {
    ["visit"]=>
    int(2)
    ["bounce"]=>
    int(1)
  }
  ["2015-02-07"]=>
  array(2) {
    ["visit"]=>
    int(1)
    ["bounce"]=>
    int(1)
  }
  ["2015-02-08"]=>
  array(2) {
    ["visit"]=>
    int(2)
    ["bounce"]=>
    int(2)
  }
  ["2015-02-09"]=>
  array(2) {
    ["visit"]=>
    int(1)
    ["bounce"]=>
    int(0)
  }
}

Answer 2

You could merge your entries like this:

$items = [];

foreach ($array as $value) {
    $date = substr($value['date'], 0, 10);

    if (!isset($items[$date]) {
        $items[$date] = [
            'date' => $date,
            'visit' => 0,
            'bounce' => 0
        ];
    }

    $items[$date]['visit'] += $value['visit'];
    $items[$date]['bounce'] += $value['bounce'];
}

By using date as a key in the $items array, we make sure we sum up the visit and bounce for each date instead of appending them.

If you'd ever want to get rid of the keys, you can simply use array_values .

Answer 3

If your array is called $myArray, and the new array your creating is $myDateArray:

$myDateArray = array();
foreach ($myArray as $value)
{
  list($date_string, $other) = explode(" ", $value['date']);
  if (array_key_exists($date_string, $myDateArray))
  { 
    //adding the visits and bounces
    $myDateArray[$date_string]['visit'] = $myDateArray[$date_string]['visit'] + $value['visit'];
    $myDateArray[$date_string]['bounce'] = $myDateArray[$date_string]['bounce'] + $value['bounce'];
  }
  else
  {
    //putting the first values (of the key $date_string) into $myDateArray
    array_push($myDateArray, array($date_string, $value['visit], $value['bounce']));
  }
}

Let me know if that worked for you!

Answer 4

The code creates a new array which contains the summed result of your array.

$resultArray = [];
foreach($array as $row){
    $dateObj = DateTime::createFromFormat('Y-m-d H:i:s', $row['date']);
    $key = $dateObj->format('Y-m-d');
    if(!array_key_exists($key, $resultArray)){
        $resultArray[$key] = ['visit' => $row['visit'], 'bounce' => $row['bounce']];
    }
    else {
        $resultArray[$key]['visit'] += $row['visit'];
        $resultArray[$key]['bounce'] += $row['bounce'];
    }
}

Result:

array (size=4)
  '2015-02-06' => 
    array (size=2)
      'visit' => int 2
      'bounce' => int 1
  '2015-02-07' => 
    array (size=2)
      'visit' => int 1
      'bounce' => int 1
  '2015-02-08' => 
    array (size=2)
      'visit' => int 2
      'bounce' => int 2
  '2015-02-09' => 
    array (size=2)
      'visit' => int 1
      'bounce' => int 0

Answer 5

Does this do the trick ?

  <?php
  $array = array (

    0  => array(
        'date'          => '2015-02-06 10:42:39',
        'visit'         => 1,
        'bounce'        => 0
        ),

    1  => array(
        'date'          => '2015-02-06 13:23:21',
        'visit'         => 1,
        'bounce'        => 1
        ),

    2  => array(
        'date'          => '2015-02-07 04:11:42',
        'visit'         => 1,
        'bounce'        => 1
        ),

    3  => array(
        'date'          => '2015-02-08 11:35:28',
        'visit'         => 1,
        'bounce'        => 1
        ),

    4  => array(
        'date'          => '2015-02-08 15:12:09',
        'visit'         => 1,
        'bounce'        => 1
        ),

    5  => array(
        'date'          => '2015-02-09 15:12:09',
        'visit'         => 1,
        'bounce'        => 0
        ),

  );

  $results = [];
  foreach($array as $e)
  {
   $date = explode(' ',$e['date'])[0] ;
   if(!isset($results[$date]))
     $results[$date] = ['visit'=>0 , 'bounce'=>0] ; 
   $results[$date]['visit'] += $e['visit'];
   $results[$date]['bounce'] += $e['bounce'];

  }

  print_r($results);

Answer 6

Solution using array_walk , substr and array_values functions:

$date_keys = [];
array_walk($array, function($v) use(&$date_keys){
    $datePart = $v['date'] = substr($v["date"], 0, 10);
    if (isset($date_keys[$datePart])) {
        $date_keys[$datePart]['visit'] += $v['visit'];
        $date_keys[$datePart]['bounce'] += $v['bounce'];
    } else {
        $date_keys[$datePart] = $v;
    }
});

print_r(array_values($date_keys));

The output:

Array
(
    [0] => Array
        (
            [date] => 2015-02-06
            [visit] => 2
            [bounce] => 1
        )

    [1] => Array
        (
            [date] => 2015-02-07
            [visit] => 1
            [bounce] => 1
        )

    [2] => Array
        (
            [date] => 2015-02-08
            [visit] => 2
            [bounce] => 2
        )

    [3] => Array
        (
            [date] => 2015-02-09
            [visit] => 1
            [bounce] => 0
        )
)

Answer 7

Technique/ Mechnism

$result = array();
$items = array_column($array, 'date');
for($i=0; $i < count($items); $i++){
    $date = date("Y-m-d", strtotime($items[$i]));   
    $result[$date][0] += $array[$i]['visit'];
    $result[$date][1] += $array[$i]['bounce'];
}

Result

Please design your output as required.

echo "date&nbsp;&nbsp;&nbsp;visit&nbsp;&nbsp;&nbsp;bounce<br/>";
foreach($result as $key => $value){
    echo $key."&nbsp;&nbsp;&nbsp;".$value[0]."&nbsp;&nbsp;&nbsp;".$value[1]."<br/>";
}

Output

date         visit   bounce
2015-02-06     2       1
2015-02-07     1       1
2015-02-08     2       2
2015-02-09     1       0