fwrite

Trying to insert text into a file ABOVE a certain line

由 有些话、适合烂在心里 提交于 2019-12-09 23:18:12
问题 I have a text file, more of a users file for a program. Im trying to use PHP to insert new data before groups: in the file. The last user is above this line and i want to insert new users below the last user and above groups: in the file Ive been tinkering and was trying some things, but i can only get it after that line. heres what i have $key = 'groups:'; $newline = 'blackberry'; //copy file to prevent double entry $file = "data2.yml"; $newfile = "filetemp.txt"; copy($file, $newfile) or

PHP 5 Filesystem 函数

由 点点圈 提交于 2019-12-09 17:37:05
Filesystem 函数允许您访问和操作文件系统。Filesystem 函数是 PHP 核心的组成部分。无需安装即可使用这些函数. 1. PHP fopen() 函数: 打开一个文件或 URL。语法:fopen(filename,mode,include_path,context) 如果 fopen() 失败，它将返回 FALSE 并附带错误信息。您可以通过在函数名前面添加一个 '@' 来隐藏错误输出。 语法:fopen( filename (必需。规定要打开的文件或 URL。),mode(必需。规定您请求到该文件/流的访问类型。 可能的值： "r" （只读方式打开，将文件指针指向文件头） "r+" （读写方式打开，将文件指针指向文件头） "w" （写入方式打开，清除文件内容，如果文件不存在则尝试创建之） "w+" （读写方式打开，清除文件内容，如果文件不存在则尝试创建之） "a" （写入方式打开，将文件指针指向文件末尾进行写入，如果文件不存在则尝试创建之） "a+" （读写方式打开，通过将文件指针指向文件末尾进行写入来保存文件内容） "x" （创建一个新的文件并以写入方式打开，如果文件已存在则返回 FALSE 和一个错误） "x+" （创建一个新的文件并以读写方式打开，如果文件已存在则返回 FALSE 和一个错误） ),include_path,context) 2.

php原生文件转laravel路由

由 时光毁灭记忆、已成空白 提交于 2019-12-08 16:29:34
此代码是把大商创的2.7.3版本admin里面的php换成laravel的routes public function saveRoute() { $dir = 'D:/WWW/dsc2.7.3/admin/'; $handler = opendir('D:/WWW/dsc2.7.3/admin/'); $arr = []; while( ($filename = readdir($handler)) !== false ) { //略过linux目录的名字为'.'和‘..'的文件 if($filename != "." && $filename != "..") { $arr[] = $filename; //输出文件名 // echo $filename.'<br>'; } } closedir($handler); $newDir = 'D:/WWW/new/route.php'; $myfile = fopen($newDir, "w+"); fwrite($myfile, "<?php\r"); foreach ($arr as $key =>$value){ if(!str_is('*.php',$value)){ continue; } $name = $this->camelize($value); $name = str_replace('.',

fwrite with non ASCII characters

由 眉间皱痕 提交于 2019-12-08 05:00:43
问题 Consider the following program: #include <stdio.h> #include <string.h> int main() { char* alpha = "Ω"; fwrite(alpha, 1, strlen(alpha), stdout); return 0; } On Windows I get the following output: �� I tried changing the line to this: char* alpha = "zΩ"; and it prints correctly. The output is encoded correctly, just not printing correctly: $ bad | od -tx1c 0000000 ce a9 316 251 $ good | od -tx1c 0000000 7a ce a9 z 316 251 How can I use fwrite with non ASCII as the first character? To response

PHP fwrite() not working

由 心已入冬 提交于 2019-12-08 03:54:28
问题 I'm writing a function in php, client side I have a canvas image which I use toDataUrl() along with a file name to save the image on the server. The here's the code: <?php $imageData=$GLOBALS['HTTP_RAW_POST_DATA']; $data = json_decode($imageData, true); $file = $data["file"]; $image = $data["data"]; $filteredData=substr($image, strpos($image, ",")+1); $unencodedData=base64_decode($filteredData); $fp = fopen( 'image/' . $file , 'wb' ); fwrite( $fp, $unencodedData); fclose( $fp ); ?> The thing

r Write text and dataframe to file

由 女生的网名这么多〃 提交于 2019-12-08 01:18:02
问题 What is the best way to write to a file some text followed by a data frame? The text is created by pasting variables into strings. Example desired output: Here is some text. This line has a variable: Hello World Data frame below the line ================= ID,val1,val2 1,2,3 2,4,6 3,6,9 4,8,12 5,10,15 6,12,18 7,14,21 8,16,24 9,18,27 10,20,30 I can create a string with the initial text: myvar <- "Hello World" out_string <- paste0("Here is some text.\n", "This line has a variable: ", myvar, "\n"

How to write to file without parenthesis in python

由 强颜欢笑 提交于 2019-12-07 22:58:19
问题 When i write to file my results: output=knew[i][0],knew[i][1], knew[i][2],eigenval[k],group[i] value=str(output) o.write(value+'\n') I get: (0.05, 0.05, 0.166667, -0.8513056, 0.9881956035137526) (0.05, 1.05, 0.166667, -0.8513056, 0.011652226336523394) (0.05, -0.9500000000000002, 0.166667, -0.8513056, 0.00015217014972403685) How to write to file so it doesn't add brackets? 回答1: Instead of value = str(output) you can do value = ', '.join(map(str, output)) What you see is the string

unix环境-文件操作： 带缓冲I/O 和 不带缓冲I/O详解

由 匆匆过客 提交于 2019-12-07 16:24:22
首先要明白不带缓冲的概念：所谓不带缓冲，并不是指内核不提供缓冲，而是只单纯的系统调用，不是函数库的调用。系统内核对磁盘的读写都会提供一个块缓冲，当用write函数对其写数据时，直接调用系统调用，将数据写入到块缓冲进行排队，当块缓冲达到一定的量时，才会把数据写入磁盘。因此所谓的不带缓冲的I/O是指进程不提供缓冲功能。每调用一次write或read函数，直接系统调用。 而带缓冲的I/O是指进程对输入输出流进行了改进，提供了一个流缓冲，当用fwrite函数往磁盘写数据时，先把数据写入流缓冲区中，当达到一定条件，比如流缓冲区满了，或刷新流缓冲，这时候才会把数据一次送往内核提供的块缓冲，再经块缓冲写入磁盘。 因此，带缓冲的I/O在往磁盘写入相同的数据量时，会比不带缓冲的I/O调用系统调用的次数要少。 举例一： 讨论关于open,write等基本系统IO的带缓冲与不带缓冲的差别 “术语不带缓冲指的是每个read和write都调用了内核中的一个系统调用。所有的磁盘I/O都要经过内核的块缓冲（也称内核的缓冲区-高速缓存），唯一例外的是对原始磁盘设备的I/O。既然read或write的数据都要被内核缓冲，那么术语“不带缓冲的I/O“指的是在用户的进程中对这两个函数不会自动缓冲，每调用一次read或write就要进行一次系统调用。“--------摘自<unix环境编程>

fwrite with non ASCII characters

由 心已入冬 提交于 2019-12-07 15:32:33
Consider the following program: #include <stdio.h> #include <string.h> int main() { char* alpha = "Ω"; fwrite(alpha, 1, strlen(alpha), stdout); return 0; } On Windows I get the following output: �� I tried changing the line to this: char* alpha = "zΩ"; and it prints correctly. The output is encoded correctly, just not printing correctly: $ bad | od -tx1c 0000000 ce a9 316 251 $ good | od -tx1c 0000000 7a ce a9 z 316 251 How can I use fwrite with non ASCII as the first character? To response to some comments: The source file is correctly formatted as UTF-8, and my code page is also correctly

how to append data in existing array without overwrite whole array [closed]

由 六月ゝ 毕业季﹏ 提交于 2019-12-07 12:18:15
问题 This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center. Closed 7 years ago . This is my code, in this code, I am reading an existing array through a function read_from_json, which convert JSON to array , now from remote data I am
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