New in Symfony 2.8: VarDumper improvements
Warning: This post is about an unsupported Symfony version. Some of this information may be out of date. Read the most recent Symfony Docs.
The VarDumper component provides mechanisms for walking through any arbitrary
PHP variable. More importantly, it provides a much better replacement for PHP's
Symfony 2.8 added new casters to VarDumper, which are responsible to format the dumped information accordingly to their types.
PostgreSQL databases are increasingly popular among Symfony developers. That's
why Symfony 2.8 includes a
PgSqlCaster to cast both connections and results.
When dumping a database connection, instead of seeing just a
resource string, you can now see lots of features of that connection:
Same goes for dumping the result of executing PostgreSQL queries, which now displays detailed information about the results:
This caster displays detailed information about dumped
These are for instance the objects returned by the Finder component.
Lastly, another nice improvement of VarDumper is the formatting of PHP and Twig code snippets in backtraces. Previously, when dumping an exception you had access to the basic stack trace:
In Symfony 2.8, the exceptions not only display the file path and line which caused the exception, but also include a formatted excerpt of the code which triggered the exception:
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