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Date: Wed, 16 Aug 2017 22:21:16 +0200
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Subject: Re: Easy method of overriding built-in php functions.
From: cmbecker69@gmx.de ("Christoph M. Becker")

On 16.08.2017 at 22:02, Ryan Jentzsch wrote:

> I am aware of Advanced PHP debugger but what I need this type of
> functionality for is mocking and testing.
> 
> As an example I want to use PHPUnit mocking feature to create a mock of a
> class. However in the constructor of this class is the following line to
> get the expected JSON string:
> 
> $result = file_get_contents('php://input');
> 
> I can not override the file_get_contents() function. The work around is to
> monkey patch the class as a mock and override the constructor (copying ALL
> logic from the constructor to the mock allowing for $result to be taken
> from the constructor's argument list).
> 
> This is awkward and in my use case the constructor also makes calls to
> static methods in other objects which the latest version of PHPUnit does
> not allow you to mock static methods.
> 
> ADP is not acceptable to override functions in that it requires a binary to
> be installed and php.ini to be configured as well as no support for this in
> Windows.
> 
> Is there an RFC that I didn't find that allows for easily overriding
> built-in functions? For example:
> 
> @function file_get_contents($string)
> {
>     return 'mock string';
> }
> 
> My C skills are quite rusty and understanding the Zend engine is a daunting
> task or I'd create an RFC myself. The devil is in the details. The real
> question I am asking is HOW DIFFICULT would something like this be to code
> and include in the PHP core?

There are already runkit and uopz which allow to override existing
functions:

* <https://pecl.php.net/package/runkit>
* <https://pecl.php.net/package/uopz>

-- 
Christoph M. Becker