A more reasonable approach when developing a website is to make some of our commonly used programs into functions or close them into classes, so that they can be reused and save development costs. Let’s introduce the commonly used classes to you.
advantage:
1. Convenient and fast, database operations only need to call the interface;
2. Unified encoding (utf8), less likely to cause garbled characters
3. Clear structure. For example, the background program that handles front-end requests (test.php) table encapsulation class (user.class.php) database encapsulation class (db.class.php) configuration information (configuration.php)
The following example has four files: configuration.php db.class.php user.class.php test.php, placed in the same directory.
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