PHP - Merge more than 2 arrays - php

Question

I'm trying to make the values in the EVENTNAME array the key of the arrays below it.
I want to be able to do a foreach on on a php variable and get the EVENTNAME and the count for its IMMIGRATIONS, EFFECTS and SUPPLYCHAINS.
$keyevents = oci_parse($conn, "SELECT EVENTNAME FROM KEYEVENTS GROUP BY EVENTNAME");
oci_execute($keyevents);
oci_fetch_all($keyevents, $keyevent);
$immigrations = oci_parse($conn, "SELECT COUNT(*) IMMIGRATIONS FROM KEYEVENTS LEFT JOIN IMMIGRATION ON KEYEVENTS.EVENTID = IMMIGRATION.EVENTID GROUP BY EVENTNAME");
oci_execute($immigrations);
oci_fetch_all($immigrations, $imm);
$effects = oci_parse($conn, "SELECT COUNT(*) EFFECTS FROM KEYEVENTS LEFT JOIN EFFECT ON KEYEVENTS.EVENTID = EFFECT.EVENTID GROUP BY EVENTNAME");
oci_execute($effects);
oci_fetch_all($effects, $eff);
$supplychains = oci_parse($conn, "SELECT COUNT(*) SUPPLYCHAINS FROM KEYEVENTS LEFT JOIN SUPPLYCHAINS ON KEYEVENTS.EVENTID = SUPPLYCHAINS.EVENTID GROUP BY EVENTNAME");
oci_execute($supplychains);
oci_fetch_all($supplychains, $supp);
$stats = array_merge($keyevent, $imm, $eff, $supp);
highlight_string("<?php\n\$stats =\n" . var_export($stats, true) . ";\n?>");
var_export
array (
'EVENTNAME' =>
array (
0 => 'Brexit',
1 => 'leave date set',
2 => 'leave date ',
3 => 'deal or no deal',
),
'IMMIGRATIONS' =>
array (
0 => '1',
1 => '1',
2 => '1',
3 => '1',
),
'EFFECTS' =>
array (
0 => '2',
1 => '1',
2 => '1',
3 => '2',
),
'SUPPLYCHAINS' =>
array (
0 => '1',
1 => '1',
2 => '1',
3 => '1',
),
)

Answer 1

I assume you don't know the key names and use array_keys to figure it out.
Then I loop the first subarray and use the key in array_column to get the other values.
Your expected output does not include associative keys in the subarray, but if you need it use the second code.
$arr = array ( 'EVENTNAME' => array ( 0 => 'Brexit', 1 => 'leave date set', 2 => 'leave date ', 3 => 'deal or no deal', ), 'IMMIGRATIONS' => array ( 0 => '1', 1 => '1', 2 => '1', 3 => '1', ), 'EFFECTS' => array ( 0 => '2', 1 => '1', 2 => '1', 3 => '2', ), 'SUPPLYCHAINS' => array ( 0 => '1', 1 => '1', 2 => '1', 3 => '1', ), );
$keys = array_keys($arr);
foreach($arr[$keys[0]] as $key => $val){
$result[$val] = array_column(array_slice($arr,1), $key);
}
var_export($result)
Output:
array (
'Brexit' =>
array (
0 => '1',
1 => '2',
2 => '1',
),
'leave date set' =>
array (
0 => '1',
1 => '1',
2 => '1',
),
'leave date ' =>
array (
0 => '1',
1 => '1',
2 => '1',
),
'deal or no deal' =>
array (
0 => '1',
1 => '2',
2 => '1',
),
)
https://3v4l.org/Seteg
$keys = array_keys($arr);
foreach($arr[$keys[0]] as $key => $val){
$result[$val] = array_combine(array_slice($keys, 1), array_column(array_slice($arr,1), $key));
}
var_export($result);
Output:
array (
'Brexit' =>
array (
'IMMIGRATIONS' => '1',
'EFFECTS' => '2',
'SUPPLYCHAINS' => '1',
),
'leave date set' =>
array (
'IMMIGRATIONS' => '1',
'EFFECTS' => '1',
'SUPPLYCHAINS' => '1',
),
'leave date ' =>
array (
'IMMIGRATIONS' => '1',
'EFFECTS' => '1',
'SUPPLYCHAINS' => '1',
),
'deal or no deal' =>
array (
'IMMIGRATIONS' => '1',
'EFFECTS' => '2',
'SUPPLYCHAINS' => '1',
),
)
https://3v4l.org/aPCub