repeat
memcache
linux
smarty
QY
---------------------------------------------------------------------
Redis is also the cached data, but he will periodically update the data written to disk
Common functions (support push / pop, add / remove),
Data type string (String)
list (list)
set (collection)
zset (sorted set - ordered collection)
hashs (hash type))
Mogodb common functions , effect, properties
Nosql：Mogodb,redis memcached
Memcache nature of the role
By caching database query results, reducing the number of database access, to improve the dynamic speed of Web applications, improve scalability. It is based on a memory "key on the" memory for storing a database call, direct API calls or pages referenced data results, such as strings, objects.
Mysql: innadb myisam difference index,
Primary Key: no business logic, increment
left right inner join 区别
1.inner join when (the connection), two connection table query, the result set to retain only two tables exact match.
2.left join, when the two table join query will return all rows from the left table, even if there is no matching record in the right table.
The main difference between the two types is Innodb support transaction processing ( rollback ) and foreign keys, and row-level locking
myisam table lock
Hiseios distributed framework
Thinkphp MVC principle of the implementation process, commonly used functions
Php：
An array of commonly used functions
String 0
File Operations
Upload function
Class , object-oriented common keywords
Polymorphic, interfaces, namespace
-------------------------------------------------------------------
Think
session
Cookie
File Upload
Image Processing
Extended Functions
Class extends
Helper