Re: Nested functions and stackoverflow

On Thu, 14 Dec 2000, Rasmus Resen Amossen wrote: > Look at the following situation: > In a php-function, say "func()", I "include()" a php-file, say > "hello1.php". > Inside "hello1.php" I initialize a variable, say "$var" and create a > link to another php-file, say "hello2.php". > In "hello2.php" I check for the existence of "$var" and calls the > function "func()" if it exists. > > Here is the problem: > If the user follows the link to "hello2.php" the function func() has in > practice been called inside itself. Or does php clear the stack, when > the html-page as been generated? > If not, we got the following situation: > > func() { > func() { > func() { > func() { > func() { > ... > ... > } > } > } > } > } > > -And that MUST produce a stackoverflow some time. > > Am I right?! > AFAIK, it causes an OOM condition in PHP, halting execution. I can't say specifically about PHP, but most high-level languages have their own stack mechanism, and usually don't get affected on stack overflows per se unless there is some sort of artificial limit imposed. -- Ignacio Vazquez-Abrams <ignacio@openservices.net>