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* This file is part of the Symfony package.
* (c) Fabien Potencier <>
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
namespace Symfony\Component\Routing\Generator;
* ConfigurableRequirementsInterface must be implemented by URL generators that
* can be configured whether an exception should be generated when the parameters
* do not match the requirements. It is also possible to disable the requirements
* check for URL generation completely.
* The possible configurations and use-cases:
* - setStrictRequirements(true): Throw an exception for mismatching requirements. This
* is mostly useful in development environment.
* - setStrictRequirements(false): Don't throw an exception but return an empty string as URL for
* mismatching requirements and log the problem. Useful when you cannot control all
* params because they come from third party libs but don't want to have a 404 in
* production environment. It should log the mismatch so one can review it.
* - setStrictRequirements(null): Return the URL with the given parameters without
* checking the requirements at all. When generating a URL you should either trust
* your params or you validated them beforehand because otherwise it would break your
* link anyway. So in production environment you should know that params always pass
* the requirements. Thus this option allows to disable the check on URL generation for
* performance reasons (saving a preg_match for each requirement every time a URL is
* generated).
* @author Fabien Potencier <>
* @author Tobias Schultze <>
interface ConfigurableRequirementsInterface
* Enables or disables the exception on incorrect parameters.
* Passing null will deactivate the requirements check completely.
* @param bool|null $enabled
public function setStrictRequirements($enabled);
* Returns whether to throw an exception on incorrect parameters.
* Null means the requirements check is deactivated completely.
* @return bool|null
public function isStrictRequirements();
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