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<?php function replace_not_entities($search, $replace, $subject) { return preg_replace_callback('/&[^;]+;|(' . preg_quote($search) . ')/', $subject, function($match) use($replace) { return isset($match[1]) ? $replace : $match[0]; }); } print replace_not_entities('um', '__', 'R&auml;ume');
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: preg_replace_callback(): Argument #2 ($callback) must be a valid callback, function "R&auml;ume" not found or invalid function name in /in/cT6lm:4 Stack trace: #0 /in/cT6lm(4): preg_replace_callback('/&[^;]+;|(um)/', 'R&auml;ume', Object(Closure)) #1 /in/cT6lm(9): replace_not_entities('um', '__', 'R&auml;ume') #2 {main} thrown in /in/cT6lm on line 4
Process exited with code 255.

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