PHP: Search in 2-Dimensional array but only look in specific key - php

Question

I want to search through a 2-dimensional array, but I only want to search in a specific field in the 2nd Dimension. If found, I would like to return the Key. No need to go on from there, I only need the first occurence but I wouldn't mind to get all occurences either.
The Array might look like this:
$array = [
0 => ['value' => 'x', 'foo' => 'bar'],
1 => ['value' => 'y', 'foo' => 'bar'],
2 => ['value' => 'z', 'foo' => 'x'],
];
Now my first thought would be something like this:
function myCustomArraySearch($array, $searchkey, $searchvalue) {
foreach ($array as $key => $value) {
if ($value[$searchkey] == $searchvalue) {
return $key;
}
}
return false;
}
echo myCustomArraySearch($array, 'value', 'x');
I'm sure, there is a more elegnt solution. Any ideas?

Answer 1

Here is one way that returns a single key:
$result = array_search('x', array_column($array, 'value'));
This will return multiple keys:
$result = array_keys(array_column($array, 'value'), 'x');
If you don't have PHP >= 5.5.0 needed for array_column() then use this in it's place:
array_map(function($v) { return $v['value']; }, $array)

Answer 2

The functions below returns the position of the first occurrence:
1 - Using foreach iteration and array_serach
function search1($array, $key, $value) {
foreach ($array as $k => $arr) {
if (array_search($value, $arr) != false) {
return $k;
}
}
return false;
}
2 - Using array_map, array_key_exists and array_search.
function search2($array, $key, $value) {
$mapped = array_map(function($arr) use ($key, $value) {
return (array_key_exists($key, $arr) && $arr[$key] == $value)
? true
: false;
},
$array);
return array_search(true, $mapped);
}

Answer 3

Your code is working fine so this code just does it in less lines. Only works for PHP 5.5+.
function myCustomArraySearch($array, $searchkey, $searchvalue) {
$cols = array_column($array, $searchkey);
$result = array_search($searchvalue, $cols);
return $result;
}
Of course, if you wanted to return the array it found and not just the index you would just return like so:
function myCustomArraySearch($array, $searchkey, $searchvalue) {
$cols = array_column($array, $searchkey);
$result = array_search($searchvalue, $cols);
return $array[$result];
}