php/sql AND statement not working - php

Question

I have my code:
$db_date2;
$today2 = date("Y-m-d");
$sql1 = "SELECT * FROM todays_spend WHERE id =$user_id_session AND date=$today2";
$date_records = mysql_query($sql1);
while($today_trip=mysql_fetch_assoc($date_records)){
$db_date2 = $today_trip['date'];
}
echo $db_date2;
It is saying "Undefined variable: db_date2". When I remove the AND statement it works. Am I doing the AND statement wrong? the 'date' field in my database is also saved in the format Y-m-d.
also tried the single qoutes '' around the variables, still not working!

Answer 1

Actually it is using your variables as string in the query rather than their values so Just replace your code with the following:
$db_date2;
$today2 = date("Y-m-d");
$sql1 =
$sql1 = "SELECT * FROM todays_spend WHERE id ='".$user_id_session."' AND date='".$today2."'";
$date_records = mysql_query($sql1);
while($today_trip=mysql_fetch_assoc($date_records)){
$db_date2 = $today_trip['date'];
}
echo $db_date2;

Answer 2

For your variables, you'll need single quotes:
This:
$sql1 = "SELECT * FROM todays_spend WHERE id =$user_id_session AND date=$today2";
Should be:
$sql1 = "SELECT * FROM todays_spend WHERE id ='$user_id_session' AND date='$today2'";

Answer 3

You need to write single quote'' around your variable.
Write your query as below:-
$sql1 = "SELECT * FROM todays_spend WHERE id ='$user_id_session' AND date='$today2'";
Warning
mysql_* was deprecated in PHP 5.5.0, and it was removed in PHP 7.0.0.
Instead, the MySQLi or PDO_MySQL extension should be used
Hope it will help you :-)