PHP Design by Contract provides a basic implementation of contract programming in PHP 5.3+. The base Contract class allows new or existing classes to define properties as protected Attributes and methods as Routines, which require argument type/class validation, aswell as PreCondition and PostCondition checks. Instances can also check for state consistency with an invariant check.
License
GNU General Public License version 3.0 (GPLv3)Follow PHP Design by Contract
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