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CoreLibs\Basic arrayDiff for full array diff

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PHP array_diff only compares missing elements in the second and existing
in the first so a full diff is only achieved if compares both ways (a,b)
and (b,a)
This function uns a full compare and returns difference in an array
This commit is contained in:
Clemens Schwaighofer
2019-12-04 12:12:43 +09:00
parent ecc52e2dbd
commit e5039b0c42
1 changed files with 15 additions and 0 deletions
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15
www/lib/CoreLibs/Basic.php
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@@ -1390,6 +1390,21 @@ class Basic
return $merged; return $merged;
} }
/**
* correct array_diff that does an actualy difference between two arrays.
* array_diff only checks elements from A that are not in B, but not the
* other way around.
* Note that like array_diff this only checks first level values not keys
* @param array $a array to compare a
* @param array $b array to compare b
* @return array array with missing elements from a & b
*/
public static function arrayDiff(array $a, array $b): array
{
$intersect = array_intersect($a, $b);
return array_merge(array_diff($a, $intersect), array_diff($b, $intersect));
}
/** /**
* search for the needle array elements in haystack and return the ones found as an array, * search for the needle array elements in haystack and return the ones found as an array,
* is there nothing found, it returns FALSE (boolean) * is there nothing found, it returns FALSE (boolean)