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<?php $str = "don't-break-me-über"; print htmlspecialchars_decode($str, ENT_QUOTES) . PHP_EOL; print html_entity_decode($str, ENT_QUOTES) . PHP_EOL; print html_entity_decode($str, ENT_QUOTES, 'ISO-8859-1') . PHP_EOL; print html_entity_decode($str, ENT_QUOTES | ENT_XML1, 'ISO-8859-1') . PHP_EOL; print html_entity_decode($str, ENT_QUOTES, 'UTF-8') . PHP_EOL; // Decode ALL entities (double quotes ("), // single quotes (' + ') and non printable chars (e.g. )) print html_entity_decode($str, ENT_QUOTES | ENT_XML1, 'UTF-8') . PHP_EOL; // Convert &#[0-9]+ entities to UTF-8 $new = preg_replace_callback("/(&#[0-9]+;)/", function($m) { return mb_convert_encoding($m[1], "UTF-8", "HTML-ENTITIES"); }, $str); print $new . PHP_EOL; // Convert &#[0-9]+ entities to ISO-8859-1 $new2 = preg_replace_callback("/(&#[0-9]+;)/", function($m) { return mb_convert_encoding($m[1], "ISO-8859-1", "HTML-ENTITIES"); }, $str); print $new2 . PHP_EOL;