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What does the Dump function do in twig?
The dump() function will not display any output unless debugging is enabled. Learn how to enable Twig debugging. Once enabled, the dump() function can be used to output information about a variable or variables within a template.
How to debug var dump variables in twig templates?
It is fully documented in the Twig documentation. Here is the documentation to enable this inside Symfony2. You can use the debug tag, which is documented here. Edit: As of Twig 1.5, this has been deprecated and replaced with the new dump function (note, it’s now a function and no longer a tag).
How to discover and inspect variables in twig templates?
However, when they are not, or when themes or modules introduce new variables we need a way to discover all the variables available within the scope of a template. Twig provides the dump() function for discovering and inspecting variables in template files. The dump() function will not display any output unless debugging is enabled.
How to dump all variables in a template?
To dump all available variables and their contents in a template, add the following to your template (after enabling debugging): To dump only the available variable keys use: There are additional global variables available in all Twig templates:
How to inspect variables in a.twig file?
Learn how to enable Twig debugging. In your .twig files, use kint() to inspect the variables just like dump() is described above. Optionally, download and install the Devel Kint Extras module to search the nested variable list.
How to whitelist objects in a Twig template?
When working with objects, we’ve whitelisted calling certain set of getters and setters or objects through the TwigSandboxPolicy class. This is done to prevent accidental methods from being called in your templates. For example: {{ node. delete }} on the node object may delete the node if the whitelist was not in place.
How to use Kint instead of dump in Themer?
The kint() function works exactly same as the dump() function above, but provides an expandable/collapsible interface to the variables that it prints out. The devel project provides a devel kint module that allows themers to use kint() instead of dump(). Download the devel module and install it.