Compare value in three array and get specific value in php - php

Question

I am comparing three value in an array and i am getting all value.
How can i output specific value or value that i only want to output
Because i want to output value that i only nedeed.
I have this code:
<?php
$participants = [
[ 'calleridnum' => 1,
'callee' => 'yay'
],
[ 'calleridnum' => 2,
'callee' => 'yay'
],
[ 'calleridnum' => 3,
'callee' => 'yay'
]
];
$conferance_participants = [
[ 'uid' => 1,
'caller' => 'yay2',
'dit' => 'deze'
],
[ 'uid' => 2,
'caller' => 'test',
'dit' => 'wew'
]
];
$contacts = [
[ 'name' => 1,
'test' => 'yay2',
'limit' => 1
],
[ 'name' => 2,
'test' => 'yay2',
'limit' => 1
]
];
foreach ($participants as $participant=>$p) {
foreach ($conferance_participants as $conferance_participant=>$cp) {
foreach ($contacts as $contact=>$cs) {
if (($p['calleridnum'] == $cp['uid']) && ($cp['uid'] == $cs['name'])){
$conferance_participants[$conferance_participant] = array_merge(
$participants[$participant],
$conferance_participants[$conferance_participant],
$contacts[$contact]
);
}
}
}
}
echo "<pre>";
print_r($conferance_participants);
echo "</pre>";
?>
and my output is:
Array
(
[0] => Array
(
[calleridnum] => 1
[callee] => yay
[uid] => 1
[caller] => yay2
[dit] => deze
[name] => 1
[test] => yay2
[limit] => 1
)
[1] => Array
(
[calleridnum] => 2
[callee] => yay
[uid] => 2
[caller] => test
[dit] => wew
[name] => 2
[test] => yay2
[limit] => 1
)
)
I want ot minimize my output.
I want to remove name test from the $contacts array
I also want to remove caller dit from the $conferance_participants array
so that my output will be :
Array
(
[0] => Array
(
[calleridnum] => 1
[callee] => yay
[uid] => 1
[limit] => 1
)
[1] => Array
(
[calleridnum] => 2
[callee] => yay
[uid] => 2
[limit] => 1
)
)

Answer 1

Your code is hard to understand,
Number of times your foreach will execute,
count($participants) * count($conferance_participants) * count($contacts);
Number of times this code's foreach will execute will be equal or less than your codes, because it will stop as soon as the match found.
Also i have created a new function, for searching in another arrays, so it will make the next person working on this code less bang his head on the desk.
Passes $conferance_participants variable's value as reference, note the & in foreach declaration so no need to worry about keys of the array.
foreach($conferance_participants as &$record) {
# find keys of corresponding array matches
$key_in_participants = _custom_search($record['uid'], $participants, 'calleridnum');
$key_in_contacts = _custom_search($record['uid'], $contacts, 'name');
# unset unwanted things
unset($record['caller'], $record['dit']);
# activate this code if you want to make false for unmatched records
/* ***********************************************************************
if($key_in_participants === false || $key_in_contacts === false) {
$record['calleridnum'] = $record['callee'] = $record['limit'] = false;
continue;
}
*********************************************************************** */
# setting required things
$record['calleridnum'] = $participants[$key_in_participants]['calleridnum'];
$record['callee'] = $participants[$key_in_participants]['callee'];
$record['limit'] = $contacts[$key_in_contacts]['limit'];
}
function _custom_search($id, $array, $key_to_search) {
foreach ($array as $key => $val) if($val[$key_to_search] === $id) return $key;
return false;
}
This will make $conferance_participants exactly as you want.

Answer 2

You can just unset the array keys before you merge the arrays. Then set the 'name' key again for $contacts array which is needed for the loops above.
Here is the modified code sample:
<?php
$participants = [
[ 'calleridnum' => 1,
'callee' => 'yay'
],
[ 'calleridnum' => 2,
'callee' => 'yay'
],
[ 'calleridnum' => 3,
'callee' => 'yay'
]
];
$conferance_participants = [
[ 'uid' => 1,
'caller' => 'yay2',
'dit' => 'deze'
],
[ 'uid' => 2,
'caller' => 'test',
'dit' => 'wew'
]
];
$contacts = [
[ 'name' => 1,
'test' => 'yay2',
'limit' => 1
],
[ 'name' => 2,
'test' => 'yay2',
'limit' => 1
]
];
foreach ($participants as $participant=>$p) {
foreach ($conferance_participants as $conferance_participant=>$cp) {
foreach ($contacts as $contact=>$cs) {
if (($p['calleridnum'] == $cp['uid']) && ($cp['uid'] == $cs['name'])){
unset($contacts[$contact]['name'], $contacts[$contact]['test']);
unset($conferance_participants[$conferance_participant]['caller'], $conferance_participants[$conferance_participant]['dit']);
$conferance_participants[$conferance_participant] = array_merge(
$participants[$participant],
$conferance_participants[$conferance_participant],
$contacts[$contact]
);
$contacts[$contact]['name'] = $cs['name'];
}
}
}
}
echo "<pre>";
print_r($conferance_participants);
echo "</pre>";
The output you should get:
Array
(
[0] => Array
(
[calleridnum] => 1
[callee] => yay
[uid] => 1
[limit] => 1
)
[1] => Array
(
[calleridnum] => 2
[callee] => yay
[uid] => 2
[limit] => 1
)
)
I hope that answers your question. Thanks.

Answer 3

After merging, you may filter only certain keys you want to be present in final result using array_intersect_key().
$keys = array_flip(['calleridnum', 'callee', 'uid', 'limit']);
$conferance_participants[$conferance_participant] =
array_intersect_key(
array_merge(
$participants[$participant],
$conferance_participants[$conferance_participant],
$contacts[$contact]
),
$keys
);