Extract equal values for multidimensional array in php - php

Question

I have this problem. I have a multidimensional json array (don't ask - legacy code). I convert it to PHP array. I need to extract all KEYS that have EQUAL VALUE (in my case "666"). I need each key to be assign to a SEPARATE variable. In my code I succeeded to fetch the keys but I can assign them only to another array or all at once to a single variable. Please HELP!!!
Love V
Here is the code:
<?php
//user input
$in = "666";
$outputZ = '[
{"record_id_001":"1"},
{"record_id_002":"13"},
{"record_id_003":"666"},
{"record_id_004":"72661781"},
{"record_id_005":"8762"},
{"record_id_006":"666"},
{"record_id_007":"8762"},
{"record_id_008":"666"},
{"record_id_009":"8762"},
{"record_id_010":"8762"},
{"record_id_011":"666"}
]';
//convert json to php array
//someArray = json_decode($someJSON, true);
$decoZ = json_decode($outputZ, true);
// TESTING (move to comment latter)
//print_r ($decoZ);
//loop through each array an check for user input
//way 1: assign to new array
foreach($decoZ as $array => $number)
foreach($number as $key => $value)
if (in_array("$in", $number)) {
$var = $key;
$getarray = "'" . $var . "'";
$recnumber = array($getarray);
print_r ($recnumber);
}
//way 2: assign to variable
foreach($decoZ as $array => $number)
foreach($number as $key => $value)
if (in_array("$in", $number)) {
$var = $key;
echo "$var" . " ";
}
?>

Answer 1

You're overwritting your array on each iterations $recnumber = array($getarray);
I would rather follow this logic :
<?php
//user input
$in = "666";
$outputZ = '[
{"record_id_001":"1"},
{"record_id_002":"13"},
{"record_id_003":"666"},
{"record_id_004":"72661781"},
{"record_id_005":"8762"},
{"record_id_006":"666"},
{"record_id_007":"8762"},
{"record_id_008":"666"},
{"record_id_009":"8762"},
{"record_id_010":"8762"},
{"record_id_011":"666"}
]';
$decoZ = json_decode($outputZ, true);
// create empty array
$recnumber = [];
foreach($decoZ as $record)
{
foreach($record as $key => $value)
{
// simply compare input with current value
if ($value === $in)
{
// add the key to the previously created array
$recnumber[] = $key;
}
}
}
var_dump($recnumber);
This outputs :
array(4) {
[0]=>
string(13) "record_id_003"
[1]=>
string(13) "record_id_006"
[2]=>
string(13) "record_id_008"
[3]=>
string(13) "record_id_011"
}

Answer 2

You can simply remap the records.
At the end you can grab them like
$codes666 = $ids['666'];
$outputZ = '[
{"record_id_001":"1"},
{"record_id_002":"13"},
{"record_id_003":"666"},
{"record_id_004":"72661781"},
{"record_id_005":"8762"},
{"record_id_006":"666"},
{"record_id_007":"8762"},
{"record_id_008":"666"},
{"record_id_009":"8762"},
{"record_id_010":"8762"},
{"record_id_011":"666"}
]';
$records = json_decode($outputZ);
$ids = [];
foreach($records as $record) {
foreach($record as $key => $value) {
$ids[(string)$value][] = $key;
}
}
print_r($ids);
Gives
Array
(
[1] => Array
(
[0] => record_id_001
)
[13] => Array
(
[0] => record_id_002
)
[666] => Array
(
[0] => record_id_003
[1] => record_id_006
[2] => record_id_008
[3] => record_id_011
)
[72661781] => Array
(
[0] => record_id_004
)
[8762] => Array
(
[0] => record_id_005
[1] => record_id_007
[2] => record_id_009
[3] => record_id_010
)
)