How to group this PHP array by date and sum the values [closed]

Answer 1

Try something like below

"2016-03-05","theadults"=>10),
    array("thedate"=>"2016-03-05","theadults"=>1),
    array("thedate"=>"2016-03-06","theadults"=>1),
    array("thedate"=>"2016-03-07","theadults"=>1),
    array("thedate"=>"2016-03-05","theadults"=>1),
    array("thedate"=>"2016-03-07","theadults"=>1),
    array("thedate"=>"2016-03-06","theadults"=>1)
    );

print_r($array);
$new = array();
for($i=0;$i < count($array);$i++)
{
    $index = -1;
    for($j=0;$j";
print_r($new);