选择多个条件

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."          
    ";