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<?php preg_match_all('/[\x{0080}-\x{ffff}]/u', 'café', $matches); var_dump($matches);
Output for 4.3.3 - 7.2.0
array(1) { [0]=> array(1) { [0]=> string(2) "é" } }
Output for 4.3.0 - 4.3.2
Warning: Compilation failed: characters with values > 255 are not yet supported in classes at offset 17 in /in/sajNA on line 4 array(0) { }