How to solve the problem that there is no mysql.all in php7 php.ini

Migration issues in PHP7

PHP7 is the next major version of PHP. It has huge improvements in performance and security, so many websites hope to upgrade to PHP7 as soon as possible . However, upgrading to PHP7 is not always easy. Enterprises may need to adjust for incompatibilities and make changes in application code and PHP configuration files.

As mentioned above, the mysql extension in PHP7 has been removed, so if you used the mysql extension in an older version of PHP, you will need to make some modifications when migrating to PHP7. You can choose to replace the mysql extension with the mysqli extension (mysqli is the abbreviation of "MySQL Improved" extension, which provides more features and functions), or choose the PDO extension (PDO stands for PHP Data Objects, which is a general PHP database abstraction layer that can interact with multiple databases).

New features in PHP7

PHP7 is not just an upgraded version of PHP5, it also introduces some new features and improvements. The following are some of the new features in PHP7:

1. Faster performance: The performance of PHP7 is much faster than previous versions of PHP. In fact, it's nearly twice as fast as PHP5.6. This means you can handle more requests and make your website more responsive.

2. Scalar type declaration: PHP7 introduced scalar type declaration, which means that you can specify the type on the function parameter to prevent invalid type parameters from entering the function.

3. Return type declaration: Similar to scalar type declaration, PHP7 also introduces return type declaration, which allows you to specify the type returned by the function and prevent incorrect return types.

4. Anonymous classes and functions: PHP7 adds support for anonymous classes and functions, which makes the code easier to write and read.

5. Improvement of error handling: PHP7 improves error handling to throwing exceptions, which improves the readability and maintainability of the code.

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