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<?php var_dump("日(日)にフランス"); var_dump("péhpé"); var_dump(mb_strlen("日(日)にフランス")); var_dump(mb_strlen("péhpé"));
Output for git.master, git.master_jit, rfc.property-hooks
string(23) "日(日)にフランス" string(7) "péhpé" int(9) int(5)

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