Select with multiple conditions - php

Question

In form user need to check options who will receive newsletter, for example:
<input type="checkbox" name="male" value="1" />
<input type="checkbox" name="female" value="1" />
<input type="checkbox" name="person" value="1" />
<input type="checkbox" name="company" value="1" />
But I have problem how to create query for db with checked options
I have this code so far, but it is not good, because newsletter need to be 1 all the time and after that I have OR, because when I put AND I don't get the results that I need:
if($options['male']) {
$sqlAddMale = " OR gender = 2 ";
}
if($options['female']) {
$sqlAddFemale = " OR gender = 1 ";
}
if($options['person']) {
$sqlAddPerson = " OR VAT = '' ";
}
if($options['company']) {
$sqlAddCompany = " OR VAT <> '' ";
}
$query = "
SELECT email FROM users WHERE newsletter=1
".$sqlAddMale."
".$sqlAddFemale."
".$sqlAddPerson."
".$sqlAddCompany."
";

Answer 1

I think You need something like this:
$placeOr = false;
if($options['male']) {
$placeOr = true;
$sqlAddMale = " (newsletter=1 AND gender = 2) ";
}
if($options['female']) {
$sqlAddFemale = (($placeOr)?" Or ":"");
$sqlAddFemale .= " (newsletter=1 AND gender = 1) ";
$placeOr = true;
}
if($options['person']) {
$sqlAddPerson = (($placeOr)?" Or ":"");
$sqlAddPerson .= " (newsletter=1 AND VAT = '') ";
$placeOr = true;
}
if($options['company']) {
$sqlAddCompany = (($placeOr)?" Or ":"");
$sqlAddCompany .= " (newsletter=1 AND VAT <> '') ";
$placeOr = true;
}
$query = "
SELECT email FROM users WHERE
".$sqlAddMale."
".$sqlAddFemale."
".$sqlAddPerson."
".$sqlAddCompany."
";

Answer 2

Here is how you can solve your issue, use one variable to build up your where clause, use AND operater when you are adding the first condition, else use OR
$sqlString = '';
if($options['male']) {
$sqlString = " AND gender = 2 ";
}
if($options['female']) {
if(!$sqlString) $sqlString = " AND gender = 1 ";
else
$sqlString .= " OR gender = 1 ";
}
if($options['person']) {
if(!$sqlString) $sqlString = " AND VAT = '' ";
else
$sqlString .= " OR VAT = '' ";
}
if($options['company']) {
if(!$sqlString) $sqlString = " AND VAT <> '' ";
else
$sqlString .= " OR VAT <> '' ";
}
$query = "SELECT email FROM users WHERE newsletter=1'".$sqlString."'";