Detailed explanation of exporting to Excel or CSV based on PHP (with utf8, gbk encoding conversion)_PHP tutorial

function exportToCsv($csv_data, $filename = 'export.csv') {
    $csv_terminated = "/n";
    $csv_separator = ",";
    $csv_enclosed = '"';
    $csv_escaped = "//";
    // Gets the data from the database
    $schema_insert = '';
    $out = '';
    // Format the data
    foreach ($csv_data as $row)
    {
        $schema_insert = '';
        $fields_cnt = count($row);
        //printr($row);
        $tmp_str = '';
        foreach($row as $v)
        {
            $tmp_str .= $csv_enclosed.str_replace($csv_enclosed, $csv_escaped . $csv_enclosed, $v).$csv_enclosed.$csv_separator;
        } // end for

        $tmp_str = substr($tmp_str, 0, -1);
        $schema_insert .= $tmp_str;
        $out .= $schema_insert;
        $out .= $csv_terminated;
    } // end while
    header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
    header("Content-Length: " . strlen($out));
    header("Content-type: text/x-csv");
    header("Content-Disposition:filename=$filename");
    echo $out;
}
/*
$csv_data = array(array('Name', 'Address'));
array_push($csv_data, array($row['name'],$row['address']));
...
exportToCsv($csv_data,'new_file.csv');
*/

/**
 * Simple class to properly output CSV data to clients. PHP 5 has a built
 * in method to do the same for writing to files (fputcsv()), but many times
 * going right to the client is beneficial.
 *
 * @author Jon Gales
 */
class CSV_Writer {
    public $data = array();
    public $deliminator;
    /**
     * Loads data and optionally a deliminator. Data is assumed to be an array
     * of associative arrays.
     *
     * @param array $data
     * @param string $deliminator
    */
    function __construct($data, $deliminator = ",")
    {
        if (!is_array($data))
        {
            throw new Exception('CSV_Writer only accepts data as arrays');
        }
        $this->data = $data;
        $this->deliminator = $deliminator;
    }
    private function wrap_with_quotes($data)
    {
        $data = preg_replace('/"(.+)"/', '""$1""', $data);
        return sprintf('"%s"', $data);
    }
    /**
     * Echos the escaped CSV file with chosen delimeter
     *
     * @return void
    */
    public function output()
    {
        foreach ($this->data as $row)
        {
            $quoted_data = array_map(array('CSV_Writer', 'wrap_with_quotes'), $row);
            echo sprintf("%s/n", implode($this->deliminator, $quoted_data));
        }
    }
    /**
     * Sets proper Content-Type header and attachment for the CSV outpu
     *
     * @param string $name
     * @return void
    */
    public function headers($name)
    {
        header('Content-Type: application/csv');
        header("Content-disposition: attachment; filename={$name}.csv");
    }
}
/*
//$data = array(array("one","two","three"), array(4,5,6));
$data[] = array("one","two","three");
$data[] = array(4,5,6);
$csv = new CSV_Writer($data);
$csv->headers('test');
$csv->output();
*/

require_once 'Spreadsheet/Writer.php';
$workbook = new Spreadsheet_Excel_Writer();
/* Generate CSV
$filename = date('YmdHis ').'.csv';
$workbook->send($filename); // Send Excel file name for download
*/
// Generate Excel
$filename = date( 'YmdHis').'.xls';
$workbook->send($filename); // Send Excel file name for download
$workbook->setVersion(8);
$workbook ->setBIFF8InputEncoding('UTF-8');
$worksheet =& $workbook->addWorksheet("Sheet-1");
$data[]= array('id','username' ,'company','email','mob','daytime','intent');
$data[] = array(1,'Laoliang','**Studio','jb51.net ','1363137966*',time(),'y');
$total_row = count($data);
$total_col = count($data[0]);
for ($row = 0; $row < $total_row; $row ++) {
for ($col = 0; $col < $total_col; $col ++) {
$worksheet->writeString($ row, $col, $data[$row][$col]); // Write data in sheet-1
}
}
/*
$worksheet =& $workbook- >addWorksheet("Sheet-2");
$data[]= array('id','username','company','email','mob','daytime','intent');
$data[] = array(1,'Laoliang','**Studio','jb51.net','1363137966*',time(),'y');
$total_row = count($data);
$total_col = count($data[0]);
for ($row = 0; $row < $total_row; $row ++) {
for ($ col = 0; $col < $total_col; $col ++) {
$worksheet->writeString($row, $col, $data[$row][$col]); // in sheet- 2 Write data in
}
}
*/
$workbook->close(); // Complete download
?>

require "excel_class.php ";
Read_Excel_File("Book1.xls",$return);
for ($i=0;$i{
for ($j=0;$j {
echo $return[Sheet1][$i][$j]."|" ;
}
echo "
";
}
?>

require "excel_class.php";
Read_Excel_File("Book1.xls",$return);
Create_Excel_File("ddd.xls",$return[Sheet1]);
?>