Re: concatenation operator

On Thu, 2012-06-07 at 11:50 -0700, Adi Mutu wrote: > > that's nice, but i haven't understood a thing...i know something about > php core and php extensions, but nothing about the Zend engine > specific. The mentioned place is directly in the VM, which in general is harder to understand, but well, it directs to the "concat_function" on http://lxr.php.net/xref/PHP_TRUNK/Zend/zend_operators.c#1234 Knowing basic C should be enough to understand the code there. The actual "algorithm" can also easily be guessed (allocate a buffer which can hold both strings at once and copy them over,the code is a tiny bit more complex as it tries tore use an existing buffer than allocating something completely new) The question is: What do you actually want to know? > Can you point me to some resources on this topic? Unfortunately not. The source is the best documentation we have for that. johannes