php中向mysql插入数据

1  $sql='insert into news(title,subtitle,source,publishtime,content,image,author) values("'.unicode_decode( strval( $newsTitle),"utf-8").'","","'.unicode_decode( strval( $newsSource),"utf-8").'","2012-12-12 10:10","","","")';
2 
3  
4  if( $conn->multi_query( $sql)){
5     echo "success";
6   } else{
7     echo "insert failure";
8   }