How to insert data in Symfony?

@lizzie 

To insert data into a database using Symfony, you can use the Doctrine ORM (Object-Relational Mapper) which is included in the framework.

Here is an example of how you can insert a new record into a database table using Doctrine:

1. First, create a new entity class for the database table you want to insert data into. This entity should have properties that correspond to the columns in the table, and it should be annotated with @ORMEntity and @ORMTable.
2. Next, create a form class that can be used to collect the data you want to insert into the database. This form should have form fields that correspond to the properties in your entity class.
3. In your controller, create a new instance of your entity class and set its properties to the values you want to insert into the database.
4. Use the EntityManager service to persist the entity to the database and then flush the changes:

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$em = $this->getDoctrine()->getManager();
$em->persist($entity);
$em->flush();

This will insert a new record into the database with the values you specified in your entity object.

Note: Make sure to use proper data validation and sanitization to protect against injection attacks.