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<?php $result = "°Freen\x18 ew°\x90ɮ\xc2"; $result = preg_replace('~[\x{0000}-\x{001F}\x{007F}-\x{00a0}\xC2-\xDF]((?![\x80-\xBF])|[\x80-\xBF]{2,})~', '', $result); /* //reject overly long 2 byte sequences, as well as characters above U+10000 and replace with ? $result= preg_replace( '/[\xC2-\xDF]((?![\x80-\xBF])|[\x80-\xBF]{2,})/S', '', $result ); */ echo $result;
Output for git.master, git.master_jit, rfc.property-hooks
°Freen ewɮ

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