Câu hỏi phỏng vấn PHP
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What is PDO in PHP?

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What is PDO in PHP?

PDO (PHP Data Objects) is a database abstraction layer that provides a consistent interface for interacting with different database management systems (DBMS) in PHP. It allows developers to write database-agnostic code, making it easier to switch between different databases without having to rewrite the entire application.

PDO provides a set of methods and properties that enable developers to perform various database operations, such as:

  1. Connecting to a database
  2. Executing SQL queries
  3. Fetching and manipulating data
  4. Handling transactions
  5. Preparing and executing parameterized queries

Here are some key features and benefits of using PDO in PHP:

Portability

PDO provides a common set of functions and methods for interacting with databases, regardless of the underlying DBMS. This means that if you need to switch from one database to another (e.g., from MySQL to PostgreSQL), you can do so with minimal changes to your code.

Prepared statements and parameter binding

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Explain the Order of Precedence for Traits in PHP

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Differentiate between parameterised and non parameterised functions

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What is the difference between using self and $this ?

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