PHP应用：FleaPHP框架数据库查询条件($conditions)写法总结

PHP学习
// $conditions 保存查询条件
$conditions = 'level_ix > 1';
// $tableOrders 是一个订单数据表的表数据入口对象
$order = $tableOrders->find($conditions, 'created DESC', 'id, title, body');
$conditions = array('username' => 'dualface');
// $tableUsers 是一个用户信息数据表的表数据入口对象
$user = $tableUsers->find($conditions);

PHP学习
// 查询主键字段值为1的记录
$user = $tableUsers->find(1);
// 如果主键字段名为"id",则生成的where字句为"WHERE `id` = 1"

PHP学习
$conditions = 'id < 3'
$user = $tableUsers->find($conditions);
//生成的where字句为"WHERE id < 3"

PHP学习
// 查询id字段值为3的记录
$conditions = array(
  'id' => '1',
 );
$user = $tableUsers->find($conditions);
//生成的where字句为"WHERE `id` = 1"

PHP学习
$conditions = array('id = 1');
// 生成的where字句为"WHERE `id` = 1"
$user = $tableUsers->find($conditions);

PHP学习
$conditions = array(
  'id < 3',
  'sex' => 'male',
);
$user = $tableUsers->find($conditions);
// 生成的where字句为"id < 3 AND `sex` = 'male'"

PHP学习
// 假如主键名为"id",需要查询id的值为1、2、3其中之一,则可以这样写：
$condition = array(
  'in()' => array(1,2,3),
)
$user = $tableUsers->find($conditions);
// 生成的where子句为"WHERE `id` IN (1, 2, 3)"

PHP学习
$condition = array(
  'in()' => array(
          'username' => array('username1','username2')
         )
  )
$user = $tableUsers->find($conditions);
// 生成的where子句为"WHERE `username` IN ('username1', 'username2')"

PHP学习
$fields = array('title', 'created');
//也可以写成下面的字符串形式,两种写法作用相同,区别在于自动生成的字段名两边将会添加上"`"符号,以防止出现字段名与SQL关键字冲突的情况出现.建议手写时也加上"`"字符
$fields = 'title, created';
$user = $tableUsers->find('id < 10',NULL,$fields);