fread

<?php $file_name = $_FILES['files']['name']; $tmp_name = $_FILES['files']['tmp_name']; $file_size = $_FILES['files']['size']; $file_type = $_FILES['files']['type']; // The codes written above work fine and have proper information. $fp = fopen($tmp_name, 'r'); // This one crashes. $file_content = fread($fp, $file_size) or die("Error: cannot read file"); $file_content = mysql_real_escape_string($file_content) or die("Error: cannot read file"); fclose($fp); .... I'm a newbie to PHP stuff. I'm trying to store a jpg image as blob in a database but terribly struggling with it :( I tried many

I have a structure, that contain string. Something like that: struct Chunk { int a; string b; int c; }; So, i suppose, that i cannot write and read this structure from file using fread and fwrite functions. Because string may reserve different memory capacity. But such code works correctly. Chunk var; fwrite(&var, sizeof(Chunk), 1, file); fread(&var, sizeof(Chunk), 1, file); Is there really some problems in it? You are justified in doubting this. You should only stream POD types with fwrite and fread and string is not POD . You shouldn't do it like this, because different implementations use

教程简介 为你的评论区加入 已评论者的IP地理位置显示 也不算什么有用的功能 想为你的博客加上这个小功能的 那就继续阅读哦 不想加的右上角X 不废话了 直接开始吧 第一步 你的模版/module.php增加如下代码 <? php //评论IP显示 function convertip ( $ip ) { $dat_path = EMLOG_ROOT . '/ip.dat' ; //*数据库路径*// if (! $fd = @fopen ( $dat_path , 'rb' )){ return 'IP数据库文件不存在或者禁止访问或者已经被删除！' ; } $ip = explode ( '.' , $ip ); $ipNum = $ip [ 0 ] * 16777216 + $ip [ 1 ] * 65536 + $ip [ 2 ] * 256 + $ip [ 3 ]; $DataBegin = fread ( $fd , 4 ); $DataEnd = fread ( $fd , 4 ); $ipbegin = implode ( '' , unpack ( 'L' , $DataBegin )); if ( $ipbegin < 0 ) $ipbegin += pow ( 2 , 32 ); $ipend = implode ( '' , unpack ( 'L' ,

I have two questions about C's fread function: I have read that fread is used to read a binary file. However, when I read a binary file with fgets using read mode "r" and a text file with fread using "rb" mode, the results are the same as reading a text file with fgets and a binary file with fread . So, why are there different functions for reading binary and text files? I am using fread to read 10 bytes of a file in one call. How should I stop reading at the end of file – i.e. how is EOF specified in fread ? answer of 1 question > 1> fread size_t fread ( void * ptr, size_t size, size_t count,

This is a test program that I have written for a larger project that I am working on. It has to do with writing struct data to disk with fwrite() and then reading that data back with fread(). One member of the struct is dynamically allocated. First, here is my code #include <stdio.h> #include <stdlib.h> #include <string.h> #define STRING_LEN 128 struct Person { int age; char *name; }; int main(int argc, const char *argv[]) { struct Person *person = calloc(1, sizeof(struct Person)); person->age = 22; person->name = calloc(STRING_LEN, sizeof(char)); char *name = "Name that is really, really,

I am trying to write a function that returns the pointer of 2d array read from a binary file. Although I compile without error there is always a segmentation fault, when I try to print one of the elements of the array. Here my code: double ** readArray(int rows, int cols) { int i; double **myArray=malloc(rows*sizeof(double*)); if (myArray){ for (i=0; i < rows; i++) { myArray[i]=malloc(cols*sizeof(double)); } } FILE *data; data=fopen("matrix.bin", "rb"); fread(myArray,sizeof(double),rows*cols,data); return myArray; } int main () { int cols = 7; int rows = 15; double **myArray=readArray(rows,