mysql select statement in php having three conditions

hi, can someone tell me how to do this: i have to retrive data from a mysql table let's sayTABLE . i have to check that the rows i retrive meet this condition: field1='$variable',field2 is false and field3 is also false. as you can see field2 and field3 are bool type. field1 is varchar. i did this query "SELECT * FROM TABLE WHERE field1='$variable' AND field2='0' AND field3='0'"; another one tried is "SELECT * FROM TABLE WHERE field1='$variable' AND field2=false AND field3=false"; But none was a success. it didn't matter whether i used '0' or 0 and false or 'false'. thanks in advance.