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run code in 200+ php & hhvm versions
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<?php $variable = "Памиы"; preg_match('/([\p{L}]+)/ei', $variable, $matches); print_r($matches);
based on 8V9I9
Output for 5.2.10 - 7.2.0
Array ( [0] => � [1] => � )
Output for 4.4.0 - 4.4.9, 5.0.5 - 5.2.9
Array ( [0] => Памиы [1] => Памиы )
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/ICdvE on line 5 Array ( )
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/ICdvE on line 5 Array ( )