On a 32 bits system (i.e. the OS is 32 bits), by default, fopen and co are limited to 32 bits size/offset/etc… You need to enable the large file support, or use the *64 bits option: http://www.gnu.org/software/libc/manual/html_node/Opening-Streams.html#index-fopen64-931 Then your fs needs to support this, but except fat and other primitive fs, all of them support … Read more
If you know the data is in UTF8 than you want to set up the header. I wrote a solution answering to another tread. The solution is the following: As the UTF-8 byte-order mark is \xef\xbb\xbf we should add it to the document’s header. <?php function writeStringToFile($file, $string){ $f=fopen($file, “wb”); $file=”\xEF\xBB\xBF”.$file; // this is what … Read more
It is best to use PHP_EOL. This is cross-platform, so it automatically chooses the correct newline character(s) for the platform PHP is currently running on. $stringData = “Floppy Jalopy” . PHP_EOL; PHP Constants
Of course, that will not work as for strings it will copy the size of pointer, (usually 4 bytes). I see 3 options here: Serializing data, binary file (http://en.wikipedia.org/wiki/Serialization). Creating a format to store data in a text file. Use markup language like XML/JSON etc. In any case you would need to go through every … Read more
If the file is really big (log files or something like this) and you are willing to sacrifice speed for memory consumption you could open two files and essentially do the trick Jeremy Ruten proposed by using files instead of system memory. $source=”in.txt”; $target=”out.txt”; // copy operation $sh=fopen($source, ‘r’); $th=fopen($target, ‘w’); while (!feof($sh)) { $line=fgets($sh); … Read more
The following code will give you a hex dump of arbitrary memory from within your code. #include <stdio.h> // Usage: // hexDump(desc, addr, len, perLine); // desc: if non-NULL, printed as a description before hex dump. // addr: the address to start dumping from. // len: the number of bytes to dump. // perLine: number … Read more
The proper thing to do is check errno when fopen returns NULL. I’m going to guess that your problem is that you’re trying to write to a filesystem that doesn’t allow \n in filenames, but it could be a permissions issue as well.
Replace ‘\n’ with “\n”. The escape sequence is not recognized when you use ‘. See the manual. For the question of how to write line endings, see the note here. Basically, different operating systems have different conventions for line endings. Windows uses “\r\n”, unix based operating systems use “\n”. You should stick to one convention … Read more
The \n and \t characters are interpreted as linefeed and tab respectively So, the output would be as follows: username:Mo ty password:Py hon
Seems that you want to convert a binary to decimal: #include <stdio.h> int main(void) { unsigned char c = 0; int x = 10101011; int rem, i; for (i = 0; i < 8; i++) { rem = x % 10; if (rem == 1) { c |= 1U << i; } x /= 10; … Read more