how to pass dynamically value to where condition if the specific value exists in array?

Question

I'm sending values from ajax to PHP as an associative array, depending on some values i should include statement into WHERE statement. For example i have this kind of array

Array
(
    [project_name] => Riverside
    [property_type] => For Rent
    [rooms] => default
)

if rooms value is equal to default, i should not use WHERE statement for rooms so it looks like this.

$sql = SELECT Property_Type, Property_Name, Rooms from  appartment
             WHERE Project_Name = :project_name AND
              Property_Type = :property_type;

in case if array rooms is equal to 2, sql statement should look like this

$sql = SELECT Property_Type, Property_Name, Rooms from  appartment
             WHERE Project_Name = :project_name AND
              Property_Type = :property_type AND Rooms = 2;

I don't want to write to separate sql statements, since this will apply as well for project_name and project_type if the values is All projects it should not use Project_Name in Where statement.

Can anyone explain how can i achieve this?

Answer 1

Dynamically build your query:

$sql = 'SELECT Property_Type, Property_Name, Rooms from  appartment';
$where = [];
$params = [];

foreach ($_GET['WhereConditions'] as $key => $value) {
    switch($key) {
        case 'rooms':
            if ($value == 2) {
                $where[] = "`Rooms` = :roomsCount";
                $params[':roomsCount'] = 2;
            }

            break;
         ...
    }
}

if (!empty($where)) {
     $sql .= ' WHERE '.implode('AND', $where);
}

$db->prepare($sql)->fetchAll($params);