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<?php function replace_not_entities($search, $replace, $subject) { return preg_replace_callback('/&[^;]+;|(' . preg_quote($search) . ')/', function($match) use($replace) { return isset($match[1]) ? $replace : $match[0]; }, $subject); } print replace_not_entities('um', '__', 'R&auml;ume');
Output for git.master, git.master_jit, rfc.property-hooks
R&auml;__e

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