Description:
------------
The script example here (https://www.php.net/manual/en/internals2.memory.management.php) fails to mention how to try the example by setting up your own extension with ext_skel.php and adding the function provided in this example. It is also ambiguous about whether the example code is in PHP or c. An experienced developer could probably figure this out with the pointer dereferencing going on, but it would be helpful if the guide was more clear on what language is being used in the examples and how it is integrated into an executable and testable target.

Test script:
---------------
//The example code that is referenced on the documentation page.
ZEND_FUNCTION(zend_leak_bytes)
{
    zend_long leakbytes = 3;

    if (zend_parse_parameters(ZEND_NUM_ARGS(), "|l", &leakbytes) == FAILURE) {
        return;
    }

    emalloc(leakbytes);
}