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.
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GNU General Public License version 3.0 (GPLv3)Follow PHP Design by Contract
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