Array_merge, safety and race condition? View as Markdown

Now I'm no core developer, but I think what you fear is impossible. If I'm
not mistaken: array_merge() will write it's result to a piece of data and
when it's finished, it will make $array1 point to it, as I expect this to
work in every function that returns something.

Ron

"Ezra Nugroho" enugroho@spikesource.com schreef in bericht
news:1131730140.30983.2.camel@ganges.spikesource.com...

I sent this to the general list, but I didn't get definitive answer.
Maybe internals is the better forum to talk about it.
If you have a test code, or other pointers towards a definitive answer,
I'd love to try it.

Thanks

Php experts everywhere,

I want to merge two arrays, and I want to store the result as the first
array. Something like the following:

$array1 = array_merge ($array1, $array2);

So far the code gives me what I want. However, suppose if $array1 is
extremely huge, am I introducing a bug here because of possible race
condition? It's possible that array_merge has two write something to
$array1 (left hand side) before it even finishes reading it (argument)
in the first place. Let alone merging the two.

Should I just go conservative and do:

$tmp = array_merge($array1, $array2);
$array1 = $tmp;

Thank you,
Ezra