function wap_substr($string, $start, $length, $charset = 'UTF-8', $dot = false)
{
$start = $start ? $start : 0;
$length = $length ? $length : 0;
$string = $string ? $string : '';
if (in_array($charset, array('utf-8', 'UTF-8', 'utf8'))) {
return utf8_substr($string, $start, $length, $dot);
} else {
return gbk_substr($string, $start, $length, $dot);
}
}
function format_substr($str, $slen, $ext = "")
{
global $_G;
if ($_G['product']['charset'] == "utf-8") {
return utf_substr($str, $slen, $ext);
} else {
return gbk_substr($str, $slen, $ext);
}
}