How Can I Check the Final Parametrized SQL Query Executed by PDO in PHP?

Checking the Final SQL Parametrized Query in PHP with PDO

In the world of PHP database interactions, utilizing PDO (PHP Data Objects) for MySQL database access is a widely adopted practice. When dealing with parametrized queries, a question may arise: how can we inspect the final query after resolving all the tokens?

The Challenge

Unfortunately, there's an inherent limitation in this regard. The full SQL query, once all tokens have been replaced, does not exist on the PHP side. This is because the query with tokens and the parameters are sent separately to the database. The complete query is only assembled on the database server.

Workaround for Inspecting Queries

While we cannot directly retrieve the final query, there exists a workaround to Einblick what is actually executed on the server: logging SQL queries.

By modifying the database configuration file (my.cnf or my.ini in Wamp servers), you can enable logging by adding a line similar to this:

log=[REPLACE_BY_PATH]/[REPLACE_BY_FILE_NAME]

This will log all executed queries to a specified file path. However, it's imperative to note that this workaround should not be used in production environments due to potential security and privacy concerns.

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