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<?php $strings1 = 'Арг.ен!тина ма,нит нег$ра'; $strings2 = 'S!um summ$us mu,s'; $strings3 = 'Арг.ен!тина ма,нит нег$ра'.'S!um summ$us mu,s'; $strings1 = mb_strtolower(preg_replace('/[^\p{Cyrillic}\p{Latin}]/u', '', $strings1)); var_dump($strings1); $strings2 = mb_strtolower(preg_replace('/[^\p{Cyrillic}\p{Latin}]/u', '', $strings2)); var_dump($strings2); $strings3 = mb_strtolower(preg_replace('/[^\p{Cyrillic}\p{Latin}]/u', '', $strings3)); var_dump($strings3);
Output for git.master, git.master_jit, rfc.property-hooks
string(38) "аргентинаманитнегра" string(12) "sumsummusmus" string(50) "аргентинаманитнеграsumsummusmus"

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