attack surface reduction

PHP builtin functions usage statistics

I was working on a project which required implementation of PHP builtin functions. To understand the scope of the project and its implementation effort I thought it is a good idea to get an estimate of the total number of these functions, and also, how frequently they are used among popular PHP applications. This would give me a rough idea of how many functions I need to implement myself. At the same time, the results can be leveraged to get insight into debloating effectiveness for these applications. Which is something that I’ve been working on for over a year now....

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