Converting mysql class to sqlite class

[JACOBKELL]

I need to convert mysql class of one script to make a support for sqlite,but problem is sqlite dont have username/password thing nor database select as well,which means how some parts need to be removed.If i would convert to mssql one search and replace probaly would do the job.There is another file which contain queries but i belive that does'nt need to be touched.

So here is the code,what lines i need to remove and which just replace?

<?php
class _database {
    private $link       = false;
    private $result     = false;
    private $row        = false;

    public $settings    = array(
            "servername"=> "localhost",
            "serverport"=> "3306",
            "username"  => false,
            "password"  => false,
            "database"  => false,
            "persist"   => false,
            "dieonerror"=> false,
            "showerror" => false,
            "error_file"=> true
        );

    function __construct() {
        global $db_config;
        $this->settings = array_merge($this->settings, $db_config);
        if($this->settings["error_file"] === true) $this->settings["error_file"] = dirname(__FILE__)."/__mysql_errors.log";
    }

    function connect() {
        if (!$this->link) {
            $this->link = ($this->settings["persist"]) ? 
                mysql_pconnect(
                    $this->settings["servername"].":".$this->settings["serverport"], 
                    $this->settings["username"], 
                    $this->settings["password"]
                ) : 
                mysql_connect(
                    $this->settings["servername"].":".$this->settings["serverport"], 
                    $this->settings["username"], 
                    $this->settings["password"]
                ) or $this->error();
        }
        if (!mysql_select_db($this->settings["database"], $this->link)) $this->error();
        if($this->link) mysql_query("SET NAMES 'utf8'");
        return ($this->link) ? true : false;
    }

    function query($sql) {
        if (!$this->link && !$this->connect()) $this->error();
        if (!($this->result = mysql_query($sql, $this->link))) $this->error($sql);
        return ($this->result) ? true : false;
    }

    function nextr() {
        if(!$this->result) {
            $this->error("No query pending");
            return false;
        }
        unset($this->row);
        $this->row = mysql_fetch_array($this->result, MYSQL_BOTH);
        return ($this->row) ? true : false ;
    }

    function get_row($mode = "both") {
        if(!$this->row) return false;

        $return = array();
        switch($mode) {
            case "assoc":
                foreach($this->row as $k => $v) {
                    if(!is_int($k)) $return[$k] = $v;
                }
                break;
            case "num":
                foreach($this->row as $k => $v) {
                    if(is_int($k)) $return[$k] = $v;
                }
                break;
            default:
                $return = $this->row;
                break;
        }
        return array_map("stripslashes",$return);
    }

    function get_all($mode = "both", $key = false) {
        if(!$this->result) {
            $this->error("No query pending");
            return false;
        }
        $return = array();
        while($this->nextr()) {
            if($key !== false) $return[$this->f($key)] = $this->get_row($mode);
            else $return[] = $this->get_row($mode);
        }
        return $return;
    }

    function f($index) {
        return stripslashes($this->row[$index]);
    }

    function go_to($row) {
        if(!$this->result) {
            $this->error("No query pending");
            return false;
        }
        if(!mysql_data_seek($this->result, $row)) $this->error();
    }

    function nf() {
        if ($numb = mysql_num_rows($this->result) === false) $this->error();
        return mysql_num_rows($this->result);
    }
    function af() {
        return mysql_affected_rows();
    }
    function error($string="") {
        $error = mysql_error();
        if($this->settings["show_error"]) echo $error;
        if($this->settings["error_file"] !== false) {
            $handle = @fopen($this->settings["error_file"], "a+");
            if($handle) {
                @fwrite($handle, "[".date("Y-m-d H:i:s")."] ".$string." <".$error.">\n");
                @fclose($handle);
            }
        }
        if($this->settings["dieonerror"]) {
            if(isset($this->result)) mysql_free_result($this->result);
            mysql_close($this->link);
            die();
        }
    }
    function insert_id() {
        if(!$this->link) return false;
        return mysql_insert_id();
    }
    function escape($string){
        if(!$this->link) return addslashes($string);
        return mysql_real_escape_string($string);
    }

    function destroy(){
        if (isset($this->result)) mysql_free_result($this->result);
        if (isset($this->link)) mysql_close($this->link);
    }


}
?>

[cereal]

It's easier to extend Sqlite class instead of rewriting a new one, take a look at the manual:

• this for an example: http://www.php.net/manual/en/sqlite3.open.php
• this for complete documentation: http://www.php.net/manual/en/book.sqlite3.php