Detailed introduction on how to set table prefix in thinkphp5

When using ThinkPHP5 for database development, table prefixes are generally used to prevent table name conflicts when different applications use the same database. So how to set the table prefix in ThinkPHP5? This article will introduce it to you in detail.

1. What is a table prefix?

Table prefix refers to the fixed character or string in front of the table name in a database. For example, when we develop the ThinkPHP5 project, we can set a table prefix to "tp_", then in the database, all table names should start with "tp_".

2. Set the table prefix

In ThinkPHP5, setting the table prefix needs to be configured in the database configuration file (the database.php file located in the config directory under the project root directory). The specific operations are as follows:

1. Open the database.php file and find the default configuration item in the connections array.
2. In the default configuration item, find the params option, and then modify the value of params to the following format:

'params' => [
    // 数据库表前缀
    'prefix' => 'tp_',
],

Among them, 'prefix' => 'tp_' means in the database The table prefix is ​​"tp_".

3. Save the file and restart the project to successfully set the table prefix.

It is worth noting that setting the table prefix needs to be done when configuring the database connection, that is, in the default configuration item in the connections array. If you set the table prefix in other connection configuration items, an error will still be reported because the table cannot be found.

In addition, after setting the table prefix, we need to add the "__TABLE_PREFIX__" variable before the table name when performing operations related to the data table. For example, if we want to operate the user table, we should write like this:

Db::name('__TABLE_PREFIX__user')->where('id', 1)->find();

Through the above code, the program will automatically replace __TABLE_PREFIX__ with the table prefix we set in the database configuration file. In this way, even if you run multiple applications on one server, there will be no problems due to table name conflicts.

3. Summary

When using ThinkPHP5 for database development, setting table prefixes can effectively avoid table name conflicts. To set the table prefix, you only need to configure it in the database configuration file. When performing operations related to data tables, you need to pay attention to adding the "__TABLE_PREFIX__" variable before the table name to ensure that the program can correctly find the table.

The above is the introduction and summary of setting table prefix in this article. I hope it will be helpful to everyone when learning to use ThinkPHP5!

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