PHP string interception function (supports Chinese utf-8 interception)_PHP tutorial

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php tutorial string interception function (supports Chinese utf-8 interception)
The two Chinese character interception function methods provided in this article are mainly aimed at the problem of how to correctly intercept Chinese characters in utf8 encoding,

http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd">

$str = "12hb critical lap";
echo mb_substr($str,0,5,'utf-8');echo '
';
echo mb_substr($str,5,3,'utf-8');echo '
';
echo mb_substr($str,8,4,'utf-8');
?>

function str_wrap1($str,$elen=30)
{
$tlen = mb_strlen($str,"utf8"); //How many words are there
//$elen = 8; //The length of each line of string is 8 characters and 4 Chinese characters
$dlen = 0; //Display length of each line
$str_wrap = '';
for($i=0;$i<$tlen;$i++)
{
          $tmpchar = mb_substr($str,$i,1,"utf8");
If(strlen($tmpchar) == 3)
$charlen = 2;
        else
$charlen = 1;
            if( $dlen < $elen-1 )
           {
                $dlen += $charlen;
                $str_wrap .= $tmpchar;
}
        else
           {
                 $str_wrap .= "
".$tmpchar;
                $dlen = $charlen;
}
}
Return $str_wrap;
}

echo str_wrap1($str,5);

?>

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