<?php
mb_internal_encoding('UTF-8');
$value = 'g' . chr(0x04) .'eld';
var_dump(mb_detect_order());
var_dump(mb_substitute_character('entity'), mb_convert_encoding($value, 'UTF-8'), mb_substitute_character(), mb_detect_encoding($value, mb_detect_order(), true));
var_dump(mb_substitute_character('long'), mb_convert_encoding($value, 'UTF-8'), mb_substitute_character());
var_dump(mb_substitute_character(0x3013), mb_convert_encoding($value, 'UTF-8', 'ISO-8859-15'), mb_substitute_character());
var_dump(mb_substitute_character('none'), mb_convert_encoding($value, 'UTF-8'), mb_substitute_character());
preferences:
58.2 ms | 402 KiB | 5 Q