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ArrayHandler: find next or previous key in array and return it

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get next or previous key in array
This commit is contained in:
Clemens Schwaighofer
2023-11-02 14:01:47 +09:00
parent caf03421a7
commit 8bf694b2b2
3 changed files with 159 additions and 1 deletions
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48
www/lib/CoreLibs/Combined/ArrayHandler.php
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@@ -236,6 +236,54 @@ class ArrayHandler
return $hit_list;
}
/**
* main wrapper function for next/prev key
*
* @param array<mixed> $array array to search in
* @param int|string $key key for next/prev
* @param bool $next [=true] if to search next or prev
* @return int|string|null Next/prev key or null for end/first
*/
private static function arrayGetKey(array $array, int|string $key, bool $next = true): int|string|null
{
$keys = array_keys($array);
if (($position = array_search($key, $keys, true)) === false) {
return null;
}
$next_position = $next ? $position + 1 : $position - 1;
if (!isset($keys[$next_position])) {
return null;
}
return $keys[$next_position];
}
/**
* Get previous array key from an array
* null on not found
*
* @param array<mixed> $array
* @param int|string $key
* @return int|string|null Next key, or null for not found
*/
public static function arrayGetPrevKey(array $array, int|string $key): int|string|null
{
return self::arrayGetKey($array, $key, false);
}
/**
* Get next array key from an array
* null on not found
*
* @param array<mixed> $array
* @param int|string $key
* @return int|string|null Next key, or null for not found
*/
public static function arrayGetNextKey(array $array, int|string $key): int|string|null
{
return self::arrayGetKey($array, $key, true);
}
/**
* correctly recursive merges as an array as array_merge_recursive
* just glues things together