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<?php preg_match_all('/[\p{L}]/u', 'test åäö', $matches); var_dump($matches);
based on RkR2B
Output for 4.4.0 - 4.4.9, 5.0.5 - 7.2.0
array(1) { [0]=> array(7) { [0]=> string(1) "t" [1]=> string(1) "e" [2]=> string(1) "s" [3]=> string(1) "t" [4]=> string(2) "å" [5]=> string(2) "ä" [6]=> string(2) "ö" } }
Output for 4.3.11, 5.0.0 - 5.0.4
Warning: preg_match_all(): Compilation failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 2 in /in/uB906 on line 3 array(0) { }
Output for 4.3.0 - 4.3.10
Warning: Compilation failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 2 in /in/uB906 on line 3 array(0) { }