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What is the http-header “X-XSS-Protection”?
...was disabled by the user)
X-XSS-Protection: 0 : Disable XSS protection
The token mode=block will prevent browser (IE8+ and Webkit browsers) to render pages (instead of sanitizing) if a potential XSS reflection (= non-persistent) attack is detected.
/!\ Warning, mode=block creates a vulnerability i...
In PHP, what is a closure and why does it use the “use” identifier?
I'm checking out some PHP 5.3.0 features and ran across some code on the site that looks quite funny:
6 Answers
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How does libuv compare to Boost/ASIO?
...ime the watcher observes that the socket has data:
uv_read_start( socket, alloc_buffer, handle_read ); --.
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V
void handle_read( ... )
{
fprintf( stdout, "got data\n" );
}
Mem...
PHP: exceptions vs errors?
Maybe I'm missing it somewhere in the PHP manual, but what exactly is the difference between an error and an exception? The only difference that I can see is that errors and exceptions are handled differently. But what causes an exception and what causes an error?
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ByteBuffer.allocate() vs. ByteBuffer.allocateDirect()
To allocate() or to allocateDirect() , that is the question.
4 Answers
4
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What does the variable $this mean in PHP?
I see the variable $this in PHP all the time and I have no idea what it's used for. I've never personally used it.
10 An...
Still Reachable Leak detected by Valgrind
...mers.
The first commonly used definition of "memory leak" is, "Memory was allocated and was not subsequently freed before the program terminated." However, many programmers (rightly) argue that certain types of memory leaks that fit this definition don't actually pose any sort of problem, and there...
Failed to allocate memory: 8
...e, with 6GB sitting free while the Android emulator tells me that it can't allocate 1GB?
– Strozykowski
Nov 11 '11 at 1:38
5
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What is RSS and VSZ in Linux memory management
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RSS is the Resident Set Size and is used to show how much memory is allocated to that process and is in RAM. It does not include memory that is swapped out. It does include memory from shared libraries as long as the pages from those libraries are actually in memory. It does include all st...
Where are $_SESSION variables stored?
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The location of the $_SESSION variable storage is determined by PHP's session.save_path configuration. Usually this is /tmp on a Linux/Unix system. Use the phpinfo() function to view your particular settings if not 100% sure by creating a file with this content in the DocumentRoot of your...