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<?php preg_match_all('/[\p{InCJK_Radicals_Supplement}\p{InKangxi_Radicals}\p{InIdeographic_Description_Characters}\p{InCJK_Symbols_and_Punctuation}\p{InHiragana}\p{InKatakana}\p{InBopomofo}\p{InHangul_Compatibility_Jamo}\p{InKanbun}\p{InBopomofo_Extended}\p{InKatakana_Phonetic_Extensions}\p{InEnclosed_CJK_Letters_and_Months}\p{InCJK_Compatibility}\p{InCJK_Unified_Ideographs_Extension_A}\p{InYijing_Hexagram_Symbols}\p{InCJK_Unified_Ideographs}]/', 'test åäö', $matches); var_dump($matches);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: preg_match_all(): Compilation failed: unknown property after \P or \p at offset 30 in /in/sXg1V on line 3 NULL

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