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<?php preg_match_all('#\w#u','سیب',$f); var_dump($f); preg_match_all('#\pL#u','سیب',$f); var_dump($f);
Output for 5.3.4 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(1) { [0]=> array(3) { [0]=> string(2) "س" [1]=> string(2) "ی" [2]=> string(2) "ب" } } array(1) { [0]=> array(3) { [0]=> string(2) "س" [1]=> string(2) "ی" [2]=> string(2) "ب" } }
Output for 4.4.0 - 4.4.9, 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.3
array(1) { [0]=> array(0) { } } array(1) { [0]=> array(3) { [0]=> string(2) "س" [1]=> string(2) "ی" [2]=> string(2) "ب" } }
Output for 4.3.11, 5.0.0 - 5.0.4
array(1) { [0]=> array(0) { } } Warning: preg_match_all(): Compilation failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 1 in /in/RiNA0 on line 5 array(0) { }
Output for 4.3.0 - 4.3.10
array(1) { [0]=> array(0) { } } Warning: Compilation failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 1 in /in/RiNA0 on line 5 array(0) { }

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