With the widespread use of php, it is also very common to use different databases. PHP needs to support more database connection interfaces. If you only write programs for a single database through a single interface, this will greatly increase the complexity and learning threshold of PHP. The abstract PHP library for payment emerged to solve this problem.
This defines a lightweight, consistent interface for PHP to access the database. It provides a data access abstraction layer. No matter what database PHP is connected to, it can perform queries and obtain data through consistent functions. PDO began to ship with the release of php5.1. Previous versions of php did not support the abstract PHP library for payment
Features:
(1) Flexibility, which can be used during php running, Load new databases directly without resetting and compiling when new databases are used.
(2) Object-oriented: Control the use of the database through objects.
(3) Fast. Since PDO is written in C language and compiled into PHP, it is much faster than those abstract classes written in PHP.
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