How to set table prefix in thinkphp5

1. What is a table prefix

In a database, the fixed characters or strings in front of the table name are called table prefixes (table prefix) . 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 in the database configuration file (database.php file located in the config directory under the project root directory) ) to configure. 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 that the table prefix in the database 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. Even if you specify a table prefix in other connection settings, an error will 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. Even if you run multiple applications on the same server, there will be no problems due to table name conflicts.

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