SQL查询动态占位符

动态绑定举例

 0){//存在where语句时
    $sql .= ' WHERE '.implode(' AND ',$conditions);
}
$stmt = $mdb2 ->prepare($sql , $ph_type);//准备SQL语句
$rs = $stmt->excute($ph_value);//执行变量绑定和查询
 
?>