php mb_strlen()中英混体字符截取代码_PHP教程

function utf8substr($str, $from, $len) { return preg_replace('#^(?:[x00-x7f]|[xc0-xff][x80-xbf]+){0,'.$from.'}'. '((?:[x00-x7f]|[xc0-xff][x80-xbf]+){0,'.$len.'}).*#s', '$1',$str); }

function gb2312_strlen($string) { $str_len = strlen($string); $str_count = 0; for($j = 0; $j < $str_len; $j++) { if(ord($string{$j}) < 127) { $str_count += 1; continue; } else { if(ord($string{$j+1}) > 127) { $str_count += 1; $j++; continue; } else { $str_count += 1; continue; } } } return $str_count; } $str = "开s d"; echo gb2312_strlen($str);