I've got this array:
Array
(
[0] => Array
(
[id] => new@particip.pl
[challs] =>
)
[1] => Array
(
[id] => new@email.pl
[challs] => 551
)
[2] => Array
(
[id] => new@email.pl
[challs] => 551
)
[3] => Array
(
[id] => new@email.pl
[challs] => 553
)
[4] => Array
(
[id] => new@email.pl
[challs] => 553
)
[5] => Array
(
[id] => info@mail.com
[challs] =>
)
)
How make this to array with unique email addresses and joined challs, for ex in this case:
Array
(
[0] => Array
(
[id] => new@particip.pl
[challs] =>
)
[1] => Array
(
[id] => new@email.pl
[challs] => 551, 553
)
[2] => Array
(
[id] => info@email.com
[challs] =>
)
)
Can be it sorted, or I need to do forach inarray? Someone had idea how to do it?