FleaPHP find() 查詢不確定多條件

$conditions = null;

$fields = array('id', 'name', 'sex', 'phone');

foreach($fields as $each)
{
    if(!empty($_POST[$each]))
    {
        if($conditions)
        {
            $conditions .= " AND {$each}={$_POST[$each]}";
        }
        else
        {
            $conditions .= "{$each}={$_POST[$each]}";
        }
    }
}

?>

Reference :
fleaphp下不确定的多条件查询的巧妙解决方法_php技巧_脚本之家 
FleaPHP数据库操作的Condition分析_咨询界_百度空间