PHP nested array remove specific keys by condition - php

Question

I am using PHP 5.5.2 with MySQL back-end. I have a self-referencing database table from that I am getting an array as below :
Array
(
[0] => Array
(
[id] => 47
[s_id] =>
[m_id] =>
[title] => Aaa
[type] => G
[created_at] => 2014-08-29 06:05:18
[frequency] => d
[start] => 2014-08-29
[time] => 09:00
[children] => Array
(
[0] => Array
(
[id] => 48
[s_id] => 37
[m_id] =>
[title] => bbbbbbbbbbbbb
[type] => Q
[created_at] => 2014-08-29 06:05:18
[frequency] =>
[start] =>
[time] =>
[children] => Array
(
[0] => Array
(
[id] => 49
[s_id] => 38
[m_id] =>
[title] => cccccccccc
[type] => A
[created_at] => 2014-08-29 06:05:18
[frequency] =>
[start] =>
[time] =>
[children] => Array
(
)
)
[1] => Array
(
[id] => 50
[s_id] => 39
[m_id] =>
[title] => ddddddddd dddd
[type] => A
[created_at] => 2014-08-29 06:05:18
[frequency] =>
[start] =>
[time] =>
[children] => Array
(
)
)
[2] => Array
(
[id] => 51
[s_id] => 40
[m_id] =>
[title] => eeeeeee eeeeeee.
[type] => A
[created_at] => 2014-08-29 06:05:18
[frequency] =>
[start] =>
[children] => Array
(
)
)
)
)
[1] => Array
(
[id] => 54
[s_id] => 18
[m_id] =>
[title] => fffffffff ffff
[type] => Q
[created_at] => 2014-08-29 06:05:18
[frequency] =>
[start] =>
[time] =>
[children] => Array
(
[0] => Array
(
[id] => 55
[s_id] => 19
[m_id] =>
[title] => gggggg gggggg
[type] => A
[created_at] => 2014-08-29 06:05:18
[frequency] =>
[start] =>
[time] =>
[children] => Array
(
)
)
[1] => Array
(
[id] => 56
[s_id] => 20
[m_id] =>
[title] => hhhhhhhhhh hhhh
[type] => A
[created_at] => 2014-08-29 06:05:18
[frequency] =>
[start] =>
[children] => Array
(
)
)
)
)
[2] => Array
(
[id] => 57
[s_id] => 21
[m_id] =>
[title] => iiiiiiii iiii
[type] => Q
[created_at] => 2014-08-29 06:05:18
[frequency] =>
[start] =>
[children] => Array
(
[0] => Array
(
[id] => 58
[s_id] => 22
[m_id] =>
[title] => jjjjjjj jjj
[type] => A
[created_at] => 2014-08-29 06:05:18
[frequency] =>
[start] =>
[time] =>
[children] => Array
(
)
)
[1] => Array
(
[id] => 59
[s_id] => 23
[m_id] =>
[title] => kkkkkkkk kkkk
[type] => A
[created_at] => 2014-08-29 06:05:18
[frequency] =>
[start] =>
[time] =>
[children] => Array
(
)
)
)
)
)
)
[1] => Array
(
[id] => 47
[s_id] =>
[m_id] =>
[title] => xxxx xxx xxx
[type] => G
[created_at] => 2014-08-29 06:05:18
[frequency] => d
[start] => 2014-08-29
[time] => 09:00
[children] => Array
(
[0] => Array
(
[id] => 112
[s_id] => 37
[m_id] =>
[title] => lllllllllll llllll
[type] => Q
[created_at] => 2014-08-29 06:05:18
[frequency] =>
[start] =>
[time] =>
[children] => Array
(
[0] => Array
(
[id] => 113
[s_id] => 38
[m_id] =>
[title] => mmmmmmm mmmm
[type] => A
[created_at] => 2014-08-29 06:05:18
[frequency] =>
[start] =>
[time] =>
[children] => Array
(
)
)
[1] => Array
(
[id] => 123
[s_id] => 39
[m_id] =>
[title] => nnnnnnnnn hhhhh
[type] => A
[created_at] => 2014-08-29 06:05:18
[frequency] =>
[start] =>
[time] =>
[children] => Array
(
)
)
)
)
[1] => Array
(
[id] => 456
[s_id] => 18
[m_id] =>
[title] => ppppppp pppppp
[type] => Q
[created_at] => 2014-08-29 06:05:18
[frequency] =>
[start] =>
[time] =>
[children] => Array
(
[0] => Array
(
[id] => 545
[s_id] => 19
[m_id] =>
[title] => qqqqqqqqq qqq
[type] => A
[created_at] => 2014-08-29 06:05:18
[frequency] =>
[start] =>
[time] =>
[children] => Array
(
)
)
[1] => Array
(
[id] => 435
[s_id] => 20
[m_id] =>
[title] => ssssssssss sssssssssss
[type] => A
[created_at] => 2014-08-29 06:05:18
[frequency] =>
[start] =>
[children] => Array
(
)
)
)
)
)
)
)
There might be N nesting levels in this array.
Now for each array element, if ['type'] is G then I want to remove keys [s_id] and [m_id] and for any other type I want to remove keys [start], [end] and [time].
Edit : I have tried using a recursive function but it is not giving the desired result.
private function getarray(array &$arr){
foreach ($arr as $item)
{
switch ($item['type'])
{
case 'G' :
unset($item['s_id'], $item['m_id']);
break;
default :
unset($item['start'], $item['end'], $item['time']);
break;
}
foreach ($item["children"] as $c)
{
$child = array();
getarray($child);
}
}
}
How can I achieve this?
Thanks.

Answer 1

function filterMyArray($arr){
if(isset($arr['type'] && $arr['type'] == 'G'){
unset($arr['s_id']);
unset($arr['m_id']);
}
else if(isset($arr['type']){
unset($arr['start']);
unset($arr['end']);
unset($arr['time']);
}
if(isset($arr['children'])
$arr['children'] = filterMyArray($arr['children']);
return $arr;
}
This function is not tested, I wrote it from memory.
But seriously, Googling something like that doesn't hurt. It would take you 5 minutes to get all the required knowledge to do this...

Answer 2

Resolved it myself :
private function getarray(array &$arr){
foreach ($arr as &$item)
{
switch ($item['type'])
{
case 'G' :
unset($item['s_id'], $item['m_id']);
break;
default :
unset($item['start'], $item['end'], $item['time']);
break;
}
if (is_array($item['children']) && sizeof($item['children']) > 0){
getarray($item['children']);
}
}
}
And this is working fine. I have posted this answer to help other people who are novice to php and trying to overcome their problem.
And this is a slap to the jealous people who did not helped me but asked "What did you tried so long?" with a superiority complex attitude. I did it myself.