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run code in 200+ php & hhvm versions
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<?php mb_internal_encoding('UTF-8'); $value = 'g' . chr(0xa4) .'eld'; $orignalValue = $value; mb_substitute_character('entity'); $value = mb_convert_encoding($value, 'UTF-8'); var_dump($value, mb_strlen($value));
Output for 5.4.0 - 7.2.0
string(5) "g?eld" int(5)
Output for 5.2.5 - 5.3.29
string(4) "geld" int(4)
Output for 4.3.2 - 5.2.4
Warning: mb_substitute_character(): Unknown character. in /in/gPl1N on line 8 string(4) "geld" int(4)
Output for 4.3.0 - 4.3.1
Warning: mb_substitute_character() [http://www.php.net/function.mb-substitute-character]: Unknown character. in /in/gPl1N on line 8 string(4) "geld" int(4)