The substr and strlen function in php does not work correctly with Russian characters. How to solve the problem?

Question

PHP

The substr and strlen function in php does not work correctly with Russian characters (utf8 encoding). Tried mb_substr also - didn't help.
Who will help solve the problem?

Answer 1

and in what incorrectness that is expressed, it is possible to learn???

Answer 2

Here is an example function:
/**
* shortenText
* @param string
* @param int
* @param bool, default true
* @since 1.0.9
*/
function shortenText( $text, $count, $addbb=true )
{
if( $count > 0 )
{
$totalchars = strlen( $text );
$charcount = 0;
$fulltext = $text;
$buffer = '';
if( $totalchars >= $count )
{
$bbcode = false;
while( strlen( $fulltext ) > 0 )
{
$char = $fulltext{0};
if( $char == '[' ) $bbcode = true;
if( ( $bbcode && $addbb ) || $charcount < $count ) $buffer .= $char;
$fulltext = substr( $fulltext, 1 );
if( !$bbcode ) $charcount++;
if( $char == ']' ) $bbcode = false;
}
$text = $buffer.( $charcount >= $count? '...': '' );
}
}
return $text;
}
If $fultext is in English letters, everything is ok. Reduces. If Russian - empty string

Answer 3

1. Use mb_substr, mb_strlen with $encoding='utf-8'
2. Don't use $char=$fulltext{0}, replace with mb_substr

Answer 4

iconv_substr($s, $from, $len, 'UTF-8')
iconv_strlen($s, 'UTF-8')
$s{$i} ==> iconv_substr($s, $i, 1, 'UTF- eight')

Answer 5

Your $bbcode is always $false, is that normal? The code is hilarious...