fwrite

问题 I am creating a file using php fwrite() and I know all my data is in UTF8 ( I have done extensive testing on this - when saving data to db and outputting on normal webpage all work fine and report as utf8.), but I am being told the file I am outputting contains non utf8 data :( Is there a command in bash (CentOS) to check the format of a file? When using vim it shows the content as: Donâ~@~Yt do anything .... Itâ~@~Ys a great site with everything....Weâ~@~Yve only just launched/ Any help

问题 I have a short C program that writes into a file until there is no more space on disk: #include <stdio.h> int main(void) { char c[] = "abcdefghij"; size_t rez; FILE *f = fopen("filldisk.dat", "wb"); while (1) { rez = fwrite(c, 1, sizeof(c), f); if (!rez) break; } fclose(f); return 0; } When I run the program (in Linux), it stops when the file reaches 2GB. Is there an internal limitation, due to the FILE structure, or something? Thanks. 回答1: On a 32 bits system (i.e. the OS is 32 bits), by

问题 I have the following test script: <?php $myFile = "testFile.txt"; $fh = fopen($myFile, 'w') or die("can't open file"); $stringData = "Floppy Jalopy\n"; fwrite($fh, $stringData); $stringData = "Pointy Pinto\n"; fwrite($fh, $stringData); fclose($fh); ?> when run however and opened usign Notepad, the data is returned in a single line without breaks as: Floppy Jalopy(crazy box)Pointy Pinto(crazy box) where i cant find the appropriate character for 'crazy box' but its a REALLY crazy box. WHAT

问题 .... finalize(char *hdrs, sendip_data *headers[], int index, sendip_data *data, sendip_data *pack) { ........ For debugging purposes I want a hex dump of the data and pack structures, which are of type sendip_data , a really complex structure. Actually they contain some binary information so I am not sure whether output of my project is correct or not. So for debugging purposes, I want to write the data into a file so that I can use hexdump as follows - $hexdump -C file.txt Also as this is a

问题 I\'m working on a mailbox project, and I have these two structures: struct mmbox_mail struct mmbox_mail { char *sender, *recipient; char *obj, *date; char flags; size_t size; }; and mail_t typedef struct{ struct mmbox_mail info; void *body; void *next; } mail_t; I cannot modify the structures\' fields, because I need variable data (for this purpose I used char* instead of char[]). Each mail_t structure is a mail. I need to save every mail of a user in a file, that could be binary or text file

问题 I\'m working on a simple file splitter/merger program in the C programming language. The problem is, for some reason fopen returns NULL, and because of that, my program is crashing at the fwrite statement. How do I fix this? Here is the C file: int SplitFile(char* filename, char* output, size_t size) { char current_file_name[256]; int file_count = 0, i = 0; FILE *file = fopen( filename, \"rb\" ); printf(\"split %s into chunks of %d named\\n\", filename, size); if (!file) return E_BAD_SOURCE;

问题 My code: $i = 0; $file = fopen(\'ids.txt\', \'w\'); foreach ($gemList as $gem) { fwrite($file, $gem->getAttribute(\'id\') . \'\\n\'); $gemIDs[$i] = $gem->getAttribute(\'id\'); $i++; } fclose($file); For some reason, it\'s writing \\n as a string, so the file looks like this: 40119\\n40122\\n40120\\n42155\\n36925\\n45881\\n42145\\n45880 From Google\'ing it tells me to use \\r\\n , but \\r is a carriage return which doesn\'t seem to be what I want to do. I just want the file to look like this: