Php mysql query syntax error (Unknown field) -

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this question has answer here:

include("db_connector.php");     $soru = "asdasds";     $tip = 1;     $soruid = 0;          $sql = "insert sor (anketid,sorumetni,tip) values (".$_session['anket'].",".$soru.",".$tip.")";         $islem = mysql_query($sql)or die(mysql_error());;         if(isset($islem))         {             $soruid = mysql_insert_id();         }else         {             header("refresh:2;sorular.php");         }

this code give error : unknown column 'asdasds' in 'field list'

i add ' before , after every variable in query. cannot pass string query without adding single quote '.

change from:

$sql = "insert sor (anketid,sorumetni,tip) values (".$_session['anket'].",".$soru.",".$tip.")";

to : 

$sql = "insert `sor` (anketid,sorumetni,tip)          values ('".$_session['anket']."', '".$soru."', '".$tip."')";

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