เวลาอัพภาพแล้วชื่อมันซ้ำกันแก้ไขยังไงดีครับขอคำแนะนำหน่อยครับ

$strFileName = date("YmdHis").",jpg";
	if(move_uploaded_file($HTTP_POST_FILES["filUpload"]["tmp_name"],"myphoto/".$strFileName
	.iconv('UTF-8','TIS-620',''.$HTTP_POST_FILES["filUpload"]["name"].'')))
			
			{
$date_in = date("d-m-Y");
$strSQL = "INSERT INTO nt_act "; 
$strSQL .="(id_act,name_photo,name_act,date_act,detail_act,id_photo,date_in,status_act) "; 
$strSQL .="VALUES "; 
$strSQL .="('','".$HTTP_POST_FILES["filUpload"]["name"]."','".$_POST["name_act"]."','".$_POST["date_act"]."','".$_POST["detail_act"]."','','$date_in','') "; 
$objQuery = mysql_query($strSQL); 

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<?
include("include/connect.php");

$strSQL = "SELECT * FROM nt_act WHERE  name_act = '".trim($_POST["name_act"])."' ";
$objQuery = mysql_query($strSQL);
$objResult = mysql_fetch_array($objQuery);
if($objResult)
{
echo " บันทึก ชื่อกิจกรรม ซ้ำกันไม่ได้ กรุณาตรวจสอบ ";
echo "<meta http-equiv=refresh content=3;URL=data_act_add.php>";
}
else
{	
	$strFileName = date("YmdHis").",jpg";
	if(move_uploaded_file($HTTP_POST_FILES["filUpload"]["tmp_name"],"myphoto/".$strFileName
	.iconv('UTF-8','TIS-620',''.$HTTP_POST_FILES["filUpload"]["name"].'')))
			
			{
$date_in = date("d-m-Y");
$strSQL = "INSERT INTO nt_act "; 
$strSQL .="(id_act,name_photo,name_act,date_act,detail_act,id_photo,date_in,status_act) "; 
$strSQL .="VALUES "; 
$strSQL .="('','".$HTTP_POST_FILES["filUpload"]["name"]."','".$_POST["name_act"]."','".$_POST["date_act"]."','".$_POST["detail_act"]."','','$date_in','') "; 
$objQuery = mysql_query($strSQL); 

}
if($objQuery) 

{  
echo "บันทึกข้อมูลเรียบร้อย";
//echo "<meta http-equiv=refresh content=0;URL=news-all.php>";
echo "<a href='news-all.php' title='กลับ'>[กลับหน้าหลัก]</a>";
} 
else
{    
echo "Error Save [".$strSQL."]"; 
} 
}
mysql_close($objConnect); 
?>