数据操作 phpfans留言版用到的数据操作类和分页类

php中文网

发布时间：2016-07-29 08:36:03

1061人浏览过

来源于php中文网

原创

复制代码代码如下:

class mysql{
    function connect($dbhost, $dbuser, $dbpw, $dbname = '',$dbcharset='') {
        if(!@mysql_connect($dbhost, $dbuser, $dbpw)) {
            $this->show('Can not connect to MySQL server');
        }
        if($dbname) {
            $this->select_db($dbname);
        }
        if($this->version() > '4.1') {
            if($dbcharset) {
                 $this->query("SET NAMES '".$dbcharset."'");
            }
        }
    }
    function select_db($dbname) {
        return mysql_select_db($dbname);
    }
    function fetch_array($query, $result_type = MYSQL_ASSOC) {
        return @mysql_fetch_array($query, $result_type);
    }
    function query($sql, $type = '') {
        if(!($query = mysql_query($sql))) $this->show('MySQL Query Error', $sql);
        return $query;
    }
    function affected_rows() {
        return mysql_affected_rows();
    }
    function result($query, $row) {
        return mysql_result($query, $row);
    }
    function num_rows($query) {
        return @mysql_num_rows($query);
    }
    function num_fields($query) {
        return mysql_num_fields($query);
    }
    function free_result($query) {
        return mysql_free_result($query);
    }
    function insert_id() {
        return mysql_insert_id();
    }
    function fetch_row($query) {
        return mysql_fetch_row($query);
    }
    function version() {
        return mysql_get_server_info();
    }
    function close() {
        return mysql_close();
    }
    function show($message = '', $sql = '') {
        if(!$sql) echo $message;
        else echo $message.'
'.$sql;
    }
}
class page extends mysql{
    function pagination($sql,$maxnum,$page,$maxpages,$pagepre,$ext=''){
        global $sum,$stail,$link,$lmid,$ltail,$curpage;//$ext='&class=3'
        $SELF = $_SERVER['PHP_SELF'];
        $query = $this->query($sql);
        $rows = $this->fetch_array($query,MYSQL_NUM);
        $totalrows = $rows[0];
        $totalpages = ceil($totalrows/$maxnum);
        $startnum = ($page - 1)*$maxnum;
        $string = $sum.$totalrows.$stail.$sum.$page."/".$totalpages.$stail;
        if($page != 1){
            $string .= $link.$SELF."?page=1".$ext.$lmid."|‹".$ltail;
            $string .=  $link.$SELF.'?page='.($page - 1).$ext.$lmid."‹‹".$ltail;
        }
        if($maxpages>=$totalpages){
            $pgstart = 1;$pgend = $totalpages;
        }
        elseif(($page-$pagepre-1+$maxpages)>$totalpages){
            $pgstart = $totalpages - $maxpages + 1;
            $pgend = $totalpages;
        }
        else{
            $pgstart=(($page            $pgend=(($pgstart==1)?$maxpages:($pgstart+$maxpages-1));
        }
        for($pg=$pgstart;$pg            if($pg == $page){
                $string .=  $curpage.$SELF."?page=".$pg.$ext.$lmid.$pg.$ltail;
            }
            else $string .=  $link.$SELF."?page=".$pg.$ext.$lmid.$pg.$ltail;
        }
        if($page != $totalpages){
            $string .=  $link.$SELF.'?page='.($page + 1).$ext.$lmid."››".$ltail;
            $string .=  $link.$SELF.'?page='.$totalpages.$ext.$lmid."›|".$ltail;
        }
    return $string;
    }
}
function html($str){
    $str = get_magic_quotes_gpc()?$str:addslashes($str);
    return $str;
}
function dehtml($str){
    $str = nl2br(stripslashes($str));
    return $str;
}
function deip($str){
    $arr = explode('.',$str);
    $str = $arr[0].'.'.$arr[1].'.'.$arr[2].'.*';
    return $str;
}