← All docs

array_udiff()

Returns entries from the first of exactly two arrays whose values are absent from the second according to an integer-cast callback comparator, preserving keys.

array_udiff()

function array_udiff(array $array1, array $array2, callable $callback): array

Returns entries from the first of exactly two arrays whose values are absent from the second according to an integer-cast callback comparator, preserving keys.

Parameters:

  • $array1 (array)
  • $array2 (array)
  • $callback (callable)

Returns: array

Availability

  • Compiled (AOT): supported by the Elephc code generator.
  • eval() (magician interpreter): not available inside eval’d code.

No examples yet. Check examples/ and showcases/ for usage patterns.

Internals

For how array_udiff is implemented in the compiler, see the internals page.