- mb_convert_encoding: documentation ( source)
- mb_substitute_character: documentation ( source)
<?php
// Use descriptive replacement
mb_substitute_character('long');
$badAscii = 'Invalid input: ' . chr(0x81);
print mb_convert_encoding($badAscii, 'UTF-8', 'ASCII');
print "\n";
$utf8 = 'UTF-8 that is not in ASCII: €';
print mb_convert_encoding($utf8, 'ASCII', 'UTF-8');