<?php
###########################################################
# CLASS:    rs2csv
# Author:   Sean S. Natoewal
# Contact:  hide@address.com
# Date:     June 22th 2003
# Version:  1.0
#
# This class can be used to convert a resultset which has 
# been generated by PHP's built-in MySQL functions to a 
# comma separated values (CSV) file.
#
# If you find this script useful or are using it for one of 
# your projects please send me an email telling me a little 
# about the project and how useful the script was to you.
# 
# If you got any questions or comments feel free to mail me.
#
############################################################
class rs2csv {
    var $_str, $_fname, $_sep, $_rs, $_link, $_ctype, $_cdisp, $_con = false;
    // constructor
    function rs2csv() {
        $this->_str = "";
        $this->set_fname("file.csv");
        $this->set_ctype("text/tab-separated-values"); 
        $this->set_cdisp("attachment");
        $this->set_sep(",");  
    }
    // function to set the filename
    function set_fname($fname) {
        $this->_fname = $fname;   
    }
    // function to set the content-type
    function set_ctype($ctype) {
        $this->_ctype = $ctype;
    }
    // function to set the content-disposition
    function set_cdisp($cdisp) {
            $this->_cdisp = $cdisp;
        }
    // function to set the separator
    function set_sep($sep) {
        $this->_sep = $sep;
    }
    // function to open a connection to the MySQL server
    function make_con($server, $username, $password, $database_name) {
        $this->_link = mysql_connect($server, $username, $password) or $this->display_err("Could not connect : " . mysql_error());
        mysql_select_db($database_name, $this->_link) or $this->display_err("Could not select database");    
        $this->_con = true;
    }
    // function to close the MySQL connection
    function close_con() {
        // free resultset 
        mysql_free_result($this->_rs);
        // closing connection
        if ($this->_con) 
            mysql_close($this->_link);
    }
    // function to execute the SQL-query
    function exec_sql($sql, $link = "") {
        if (!$this->_con) 
            $this->_link = $link;
        if ($this->_link == "" || !$this->_con) 
            $this->_rs = mysql_query($sql) or $this->display_err("Query failed : " . mysql_error());
        else 
            $this->_rs = mysql_query($sql, $this->_link) or $this->display_err("Query failed : " . mysql_error());
        $this->process_rs($this->_rs);
        $this->close_con();
    }
    // function to process the resultset ($rs)
    function process_rs($rs) {
        $this->_rs = $rs;
        if (mysql_num_fields($this->_rs) == 0) 
            $this->display_err("Invalid resultset. Number of fields is 0.");
        if (mysql_num_rows($this->_rs) == 0) 
            $this->display_err("Invalid resultset. Number of records is 0.");
        for ($i=0;$i<mysql_num_fields($this->_rs);$i++) { 
            $this->_str .= mysql_field_name($this->_rs, $i).$this->_sep;
        }
        $this->_str .= "\n";
        while ($line = mysql_fetch_array($this->_rs, MYSQL_ASSOC)) {
            foreach ($line as $col_value) {
                $this->_str .= $col_value.$this->_sep;
            }
            $this->_str .= "\n";
        }
    }
    // function to display an error message
    function display_err($err_msg) {
        echo "Error: $err_msg";
        exit;
    }
    // function to output the CSV file
    function output_csv() {
        if (strlen($this->_str) == 0)
            $this->display_err("Empty file");
        header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
        header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
        header("Cache-Control: no-store, no-cache, must-revalidate");
        header("Cache-Control: post-check=0, pre-check=0", false);
        header("Pragma: no-cache");
        header("Content-Length: ".strlen($this->_str));
        header("Content-type: ".$this->_ctype);
        header("Content-Disposition: ".$this->_cdisp."; filename=".$this->_fname);
        echo $this->_str;
        exit;
    }
}
?>