UTF-8 validation in PHP without using preg_match()

Answer 1

Such old issue must have been fixed already. I love regexps and use it all the time, including preg_match(), sometimes with strings bigger than 200KB. Never had problems with it. It is not only the easiest way to parse and format data, but also the fastest one for a interpreted language like PHP.

Answer 2

Have you tried ereg instead of preg_match? Perhaps this one doesn't have that bug, and you don't need a potentially buggy workaround.

Cheers,

Answer 3

You should be able to use iconv to check for validity. Just try and convert it to UTF-16 and see if you get an error.

Answer 4

Here is a string-function based solution:

http://www.php.net/manual/en/function.mb-detect-encoding.php#85294

Answer 5

You can always using the Multibyte String Functions:

If you want to use it a lot and possibly change it at sometime:

1) First set the encoding you want to use in your config file

/* Set internal character encoding to UTF-8 */
mb_internal_encoding("UTF-8");

2) Check the String

if(mb_check_encoding($string))
{
    // do something
}

Or, if you don't plan on changing it, you can always just put the encoding straight into the function:

if(mb_check_encoding($string, 'UTF-8'))
{
    // do something
}

Answer 6

hi i cant use this because sum chars make it faile