Loop and merge if there are the same key - php

Question

Array ( [0] => Array ( [field_airline] => 18 [title] => FGGH [field_route_location] => Hongkong [field_time] => 01:10 )
[1] => Array ( [field_airline] => 19 [title] => DSSA [field_route_location] => Kuala Lumpur [field_time] => 01:10 ),
[2] => Array ( [field_airline] => 19 [title] => ASAS [field_route_location] => Kuala Lumpur [field_time] => 01:10 )
)
The merge result I want
Array ( [0] => Array ( [field_airline] => 18 [title] => FGGH [field_route_location] => Hongkong [field_time] => 01:10 ),
[1] => Array ( [field_airline] => 19 [title] => array(DSSA,ASAS) [field_route_location] => Kuala Lumpur [field_time] => 01:10)
)
I AM TRYING
<?php
$a= Array ( 0 => Array ( 'field_airline' => 18 ,
'title' => 'FGGH',
'field_route_location' => 'Hongkong',
'field_time' => '01:10'
),
1 => Array ( 'field_airline' => 19 ,
'title' => 'DSSA',
'field_route_location' => 'Kuala Lumpur',
'field_time' => '01:10'
),
2 => Array ( 'field_airline' => 19,
'title' => 'ASAS',
'field_route_location' => 'Kuala Lumpur',
'field_time' => '01:10'
)
);
$b = array();
foreach ($a as $key=>$value){
$b[$value['field_route_location']][] = $value;
}
echo '<pre>';
print_r($b);
echo '</pre>';
?>

Answer 1

function sortByLocation($a, $b)
{
return strcmp($a["field_route_location"], $b["field_route_location"]);
}
$a = Array(
0 => Array('field_airline' => 18,
'title' => 'FGGH',
'field_route_location' => 'Hongkong',
'field_time' => '01:10'
),
1 => Array('field_airline' => 19,
'title' => 'DSSA',
'field_route_location' => 'Kuala Lumpur',
'field_time' => '01:10'
),
2 => Array('field_airline' => 19,
'title' => 'ASAS',
'field_route_location' => 'Kuala Lumpur',
'field_time' => '01:10'
)
);
usort($a, 'sortByLocation'); // sorting array by location
$b = array();
foreach ($a as $key => $value)
{
$title = array();
if (!isset($b[$value['field_route_location']]))
$b[$value['field_route_location']] = $value;
else
{
if (!is_array($b[$value['field_route_location']]['title']))
array_push($title, $b[$value['field_route_location']]['title']);
else
$title = $b[$value['field_route_location']]['title'];
array_push($title, $a[$key]['title']);
$b[$value['field_route_location']]['title'] = $title;
}
}
echo '<pre>';
print_r($b);
echo '</pre>';
Output
Array
(
[Hongkong] => Array
(
[field_airline] => 18
[title] => FGGH
[field_route_location] => Hongkong
[field_time] => 01:10
)
[Kuala Lumpur] => Array
(
[field_airline] => 19
[title] => Array
(
[0] => ASAS
[1] => DSSA
)
[field_route_location] => Kuala Lumpur
[field_time] => 01:10
)
)

Answer 2

foreach ($a as $ka=>&$va)
{
foreach ($a as $kb=>$vb)
{
if ($va['field_airline'] == $vb['field_airline'] && $ka != $kb)
{
if (is_array($va['title']))
{
$va['title'][] = $vb['title'];
}
else
{
$va['title'] = array($va['title'], $vb['title']);
}
// repeat if/else with the other fields if needed
unset($a[$kb]);
}
}
}

Answer 3

Concept:
Create a blank results array. Loop through the given data. For every item, if it does not exist in results array, push it. If it does exist, push the item's title to the results array for that field_airline element.
Code:
$array_result = array();
if ( ! empty($array)){
foreach($array as $item){
// item already exists in results
if (isset($array_result[$item['field_airline']])){
// prepare title
$title = $array_result[$item['field_airline']]['title'];
$title[] = $item['title']; // push into existing array
// replace array of titles
$array_result[$item['field_airline']]['title'] = $title;
}
// encountering for first time
else{
$array_result[$item['field_airline']] = array(
'field_airline' => $item['field_airline'],
'title' => array($item['title']),
'field_route_location' => $item['field_route_location'],
'field_time' => $item['field_time'],
);
}
}
}
$array_result = array_values($array_result); // reset the keys in results
Test Code:
$array = array(
array(
'field_airline' => 18,
'title' => 'FGGH',
'field_route_location' => 'Hongkong',
'field_time' => '01:10',
),
array(
'field_airline' => 19,
'title' => 'DSSA',
'field_route_location' => 'Kuala Lumpur',
'field_time' => '01:10',
),
array(
'field_airline' => 19,
'title' => 'ASAS',
'field_route_location' => 'Kuala Lumpur',
'field_time' => '01:10',
),
);

Answer 4

Try this.
<?php
$arr=array('0' => array('field_airline' => 18,
'title' => 'FGGH',
'field_route_location' => 'Hongkong',
'field_time' => '01:10'),
'1' => array('field_airline' => 19,
'title' => 'DSSA',
'field_route_location' => 'Kuala Lumpur',
'field_time' => '01:10'),
'2' => array('field_airline' => 19,
'title' => 'ASAS',
'field_route_location' => 'Test',
'field_time' => '01:10')
);
$final=array();
$uniqkeys=array(); // to check for unique field_airline
foreach($arr as $key => $subarr)
{
if(!in_array($subarr['field_airline'],$uniqkeys))
{
$uniqkeys[]=$subarr['field_airline'];
$final[$subarr['field_airline']]= $subarr;
}
else
{
// Check if title is not same, add title to array
if($final[$subarr['field_airline']]['title'] != $subarr['title'])
{
$final[$subarr['field_airline']]['title']=array(
$final[$subarr['field_airline']]['title'], $subarr['title']);
}
//Check for location
if($final[$subarr['field_airline']]['field_route_location'] != $subarr['field_route_location'])
{
$final[$subarr['field_airline']]['field_route_location']=array(
$final[$subarr['field_airline']]['field_route_location'], $subarr['field_route_location']);
}
// Check for filed time
if($final[$subarr['field_airline']]['field_time'] != $subarr['field_time'])
{
$final[$subarr['field_airline']]['field_time']=array(
$final[$subarr['field_airline']]['field_time'], $subarr['field_time']);
}
}
}
print_r($final);
?>
Check the working example here(http://codepad.org/UkOZq9gy).