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<?php var_dump(preg_replace('/()/u', '*', "a\xc3\x84b")); var_dump(preg_last_error()); var_dump(PCRE_VERSION);
Output for git.master, git.master_jit, rfc.property-hooks
string(8) "*a*Ä*b*" int(0) string(16) "10.40 2022-04-14"

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