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What is exactly the base pointer and stack pointer? To what do they point?

... ; Create new frame pointer pointing to current stack top sub esp, 20 ; allocate 20 bytes worth of locals on stack. Then later in the function you may have code like (presuming both local variables are 4 bytes) mov [ebp-4], eax ; Store eax in first local mov ebx, [ebp - 8] ; Load ebx from ...
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How to enable PHP's openssl extension to install Composer?

... It is possible that WAMP and Composer are using different PHP installations. Composer will use the PHP set in the PATH environment variable. If you want to enable the openssl extension to install Composer, first you need to check the location of the PHP installation. Open a Comm...
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Is APC compatible with PHP 5.4 or PHP 5.5?

It doesn't seem like APC has been updated to coincide with the php 5.4 release (I wish they would have included APC in PHP core like originally planned). ...
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Laravel requires the Mcrypt PHP extension

...web enabled extensions and command line enabled extensions can differ. Run php -m in your terminal and check to see if mcrypt is listed. If it's not then check where the command line is loading your php.ini file from by running php --ini from your terminal. In this php.ini file you can enable the e...
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How can I convert NSDictionary to NSData and vice versa?

... NSDictionary -> NSData: NSMutableData *data = [[NSMutableData alloc] init]; NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:data]; [archiver encodeObject:yourDictionary forKey:@"Some Key Value"]; [archiver finishEncoding]; [archiver release]; // Here,...
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Is there any overhead to declaring a variable within a loop? (C++)

... Stack space for local variables is usually allocated in function scope. So no stack pointer adjustment happens inside the loop, just assigning 4 to var. Therefore these two snippets have the same overhead. ...
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Are PHP include paths relative to the file or the calling code?

I'm having trouble understanding the ruleset regarding PHP relative include paths. If I run file A.PHP- and file A.PHP includes file B.PHP which includes file C.PHP, should the relative path to C.PHP be in relation to the location of B.PHP, or to the location of A.PHP? That is, does it matter whic...
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How to remove elements from a generic list while iterating over it?

...Int % 2 == 0) { test.Remove(myInt); } } You still have to allocate a copy for Reverse and it introduces Huh? moment - why is there Reverse. – jahav May 25 '15 at 13:38 ...
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PHP-FPM doesn't write to error log

I've just installed a nginx+php-fpm server. Everything seems fine except that PHP-FPM never writes error to its log. 11 Ans...
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How does this milw0rm heap spraying exploit work?

...inding feature of Microsoft's XML handler, that causes heap memory to be deallocated incorrectly. Shellcode is machine code that will run when the bug occurs. Spray and memory are just some space allocated on the heap to help the exploitable condition occur. ...