Shulou(Shulou.com)06/03 Report--

This article mainly introduces the example analysis of php_pdo preprocessing sentence, which has a certain reference value, and interested friends can refer to it. I hope you will gain a lot after reading this article.

First, preprocessing statements can bring two major benefits:

1. The query only needs to be parsed (or preprocessed) once, but it can be executed multiple times with the same or different parameters. When the query is ready, the database will be analyzed, compiled, and optimized

The plan to execute the query. For complex queries, this process takes a long time, and if you need to repeat the same query with different parameters many times, the process will be large.

Greatly reduce the speed of the application. By using preprocessing statements, repeated analysis / compilation / optimization cycles can be avoided. In short, preprocessing statements take up less resources because

And run faster.

2. The parameters provided to the preprocessing statement do not need to be enclosed in quotation marks, and the driver will deal with them automatically. If your application uses only preprocessing statements, you can ensure that the

SQL injection occurs. However, if the rest of the query is built from unescaped input, there is still a risk of SQL injection.

2. Examples of preprocessing:

Thank you for reading this article carefully. I hope the article "sample Analysis of php_pdo preprocessing sentences" shared by the editor will be helpful to you. At the same time, I also hope you will support us and pay attention to the industry information channel. More related knowledge is waiting for you to learn!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.