PHP Source Code
PHP is an open source technology. Most programmers understand this to mean that it is free. While this is true, it is only half of the story. Just as important to PHP use as the cost is the fact that the PHP code itself is freely available for you to peruse or modify. In fact, unless you are using a precompiled binary version of PHP (on Windows), you already have all of the source code on your computer.
PHP is written in the C programming language, which is also where PHP gets a fair amount of its syntactical structure. If you know C, then hacking PHP will come fairly natural to you. If not, it will be more of a stretch but not impossible.
Playing around with the PHP source code itself is not something that the large majority ...
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