问题描述
据说，fopen可以使用t模式将\n转换为\r\n.所以，问题:
It is said, that fopen can use t mode to convert \n to \r\n. So, questions:
1)当我需要读写(r+)时应该如何使用t模式?是r+t还是rt+或tr+?关于b的相同问题，我应该写r+b还是怎么写?
1) How should i use t mode when i need to read and write (r+)? Should it be r+t or rt+ or tr+? Same question for b, should i write r+b or how?
2)我已经尝试使用魔术模式t在debian linux上将所有仅包含\n到\r\n的文件转换为文件(想了解其工作原理).但这是行不通的.我究竟做错了什么? t模式什么时候起作用?
2) I've tried all variants on debian linux to convert file, that contains only \n to \r\n using magic mode t (wanna understand how it works). But it does not work. What am I doing wrong? When t mode works?
这是我的代码:
// Write string with \n symbols
$h = fopen('test.file', 'wt');
fwrite($h, "test \ntest \ntest \n"); // I've checked, after file is being created
fclose($h); // \n symbols are not substituted to \r\n
// Open file, that contains rows only with \n symbols
$h = fopen('test.file', 'rt');
$data = fread($h, filesize('test.file'));
fclose($h);
// I want to see what's inside
$data = str_replace("\n", '[n]', $data);
$data = str_replace("\r", '[r]', $data);
// finally i have only \n symbols, \r symbols are not added
var_dump($data);
推荐答案
因此没有Linux.另外，根据规范r+t或r+b都是正确的(但仅适用于Windows).
So no Linux. Also, according to the spec r+t or r+b would be correct (but only on Windows).
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