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我想使用日期范围和下拉值将 Mysql 数据导出到 Excel。我使用了以下代码，但它不起作用，请告诉我我的代码有什么问题。或任何其他方式以日期范围和下拉值导出到 Excel。先感谢您

    <?php

$DB_Server = "localhost";  //MySQL Server 
$DB_Username = "root";  //MySQL Username 
$DB_Password = "";  //MySQL Password 
$DB_DBName = "yuleads"; //MySQL Database Name 
$DB_TBLName = "leads"; //MySQL Table Name
$filename = "MIS_Report";  //File Name



//create MySQL connection
$sql = "Select * from $DB_TBLName WHERE Process_Name='$ProcessName' AND DATE_FORMAT(`Entry_Date`, '%Y-%m-%d')  BETWEEN '$fdt' and  '$tdt'";

$Connect = @mysql_connect($DB_Server, $DB_Username, $DB_Password) or die("Couldn't connect to MySQL:<br>" . mysql_error() . "<br>" . mysql_errno());

//select database

$Db = @mysql_select_db($DB_DBName, $Connect) or die("Couldn't select database:<br>" . mysql_error(). "<br>" . mysql_errno());

//execute query 
$result = @mysql_query($sql,$Connect)or die("Couldn't execute query:<br>" . mysql_error(). "<br>" . mysql_errno());

$file_ending = "xls";

//header info for browser

header("Content-Type: application/xls");
header("Content-Disposition: attachment; filename=$filename.xls");
header("Pragma: no-cache");
header("Expires: 0");


//define separator (defines columns in excel & tabs in word)

$sep = "\t"; //tabbed character

//start of printing column names as names of MySQL fields

for ($i = 0; $i < mysql_num_fields($result); $i++)
{
echo mysql_field_name($result,$i) . "\t"; 
} 
print("\n");

//end of printing column names
//start while loop to get data

    while($row = mysql_fetch_row($result))
    {
        $schema_insert = "";

        for($j=0; $j<mysql_num_fields($result);$j++)
        {
            if(!isset($row[$j]))
                $schema_insert .= "NULL".$sep;
            elseif ($row[$j] != "")
                $schema_insert .= "$row[$j]".$sep;
            else
                $schema_insert .= "".$sep;
        }

        $schema_insert = str_replace($sep."$", "", $schema_insert);

 $schema_insert = preg_replace("/\r\n|\n\r|\n|\r/", " ", $schema_insert);

        $schema_insert .= "\t";
        print(trim($schema_insert));
        print "\n";

    }

?>
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