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<?php echo preg_match('/\b\pL{2,4}\b/ui', 'очень длинные слова'); echo preg_match('/\b\pL{2,4}\b/ui', 'тут короткие слова'); echo preg_replace('/\b/ui', '<$0>', 'оче-нь тут слова и так дальше');
Output for 5.5.27 - 5.5.35, 5.6.11 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 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
01<>оче<>-<>нь<> <>тут<> <>слова<> <>и<> <>так<> <>дальше<>
Output for 5.3.4 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.26, 5.6.7 - 5.6.10
01<>оче<>-<>нь<> <>�<>�ут<> <>�<>�лова<> <>�<>�<> <>�<>�ак<> <>�<>�альше<>
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
00оче-нь тут слова и так дальше
Output for 4.3.11, 5.0.0 - 5.0.4
Warning: preg_match(): Compilation failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 3 in /in/REBSM on line 2 Warning: preg_match(): Compilation failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 3 in /in/REBSM on line 3 оче-нь тут слова и так дальше
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 3 in /in/REBSM on line 2 Warning: Compilation failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 3 in /in/REBSM on line 3 оче-нь тут слова и так дальше
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240.04 ms | 402 KiB | 315 Q