file_put_contents
this may be obvious, but it took me a while to figure out what I was doing wrong. So I wanted to share. I have a file on my "c:\" drive. How do I file() it?
Don't forget the backslash is special and you have to "escape" the backslash i.e. "\\":
<?php
$lines = file("C:\\Documents and Settings\\myfile.txt");
foreach($lines as $line)
{
echo($line);
}
?>
hope this helps...
file
(PHP 4, PHP 5)
file — Reads entire file into an array
설명
array file
( string $filename
[, int $flags= 0
[, resource $context
]] )
Reads an entire file into an array.
Note: You can use file_get_contents() to return the contents of a file as a string.
인수
- filename
-
Path to the file.
Tipfopen 래퍼를 활성화하면, 파일명으로 URL을 사용할 수 있습니다. 파일 이름을 지정하는 방법은 fopen()을, 지원하는 URL 프로토콜 목록은 지원 프로토콜/래퍼 목록를 참고하십시오.
- flags
-
The optional parameter flags can be one, or more, of the following constants:
- FILE_USE_INCLUDE_PATH
- Search for the file in the include_path.
- FILE_IGNORE_NEW_LINES
- Do not add newline at the end of each array element
- FILE_SKIP_EMPTY_LINES
- Skip empty lines
- FILE_TEXT
- The content is returned in UTF-8 encoding. You can specify a different encoding by creating a custom context. This flag cannot be used with FILE_BINARY.
- FILE_BINARY
- The content is read as binary data. This is the default setting and cannot be used with FILE_TEXT.
- context
-
A context resource created with the stream_context_create() function.
Note: Context 지원은 PHP 5.0.0에서 추가되었습니다. contexts에 관한 자세한 설명은 Stream 함수 목록을 참고하십시오.
반환값
Returns the file in an array. Each element of the array corresponds to a line in the file, with the newline still attached. Upon failure, file() returns FALSE.
Note: Each line in the resulting array will include the line ending, unless FILE_IGNORE_NEW_LINES is used, so you still need to use rtrim() if you do not want the line ending present.
Note: PHP가 매킨토시 컴퓨터에서 파일을 읽거나 작성할 때 행의 끝을 판단하지 못하면, auto_detect_line_endings 실행 옵션을 활성화 함으로써 문제가 해결될 수 있습니다.
변경점
| 버전 | 설명 |
|---|---|
| 6.0.0 |
Added support for the FILE_TEXT and
FILE_BINARY flags.
|
| 5.0.0 | The context parameter was added |
| 5.0.0 | Prior to PHP 5.0.0 the flags parameter only covered include_path and was enabled with 1 |
| 4.3.0 | file() became binary safe |
예제
Example #1 file() example
<?php
// Get a file into an array. In this example we'll go through HTTP to get
// the HTML source of a URL.
$lines = file('http://www.example.com/');
// Loop through our array, show HTML source as HTML source; and line numbers too.
foreach ($lines as $line_num => $line) {
echo "Line #<b>{$line_num}</b> : " . htmlspecialchars($line) . "<br />\n";
}
// Another example, let's get a web page into a string. See also file_get_contents().
$html = implode('', file('http://www.example.com/'));
// Using the optional flags parameter since PHP 5
$trimmed = file('somefile.txt', FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
?>
주의
Warning
SSL을 사용할 때, 마이크로소프트 IIS는 close_notify 식별자를 보내지 않은채 접속을 종료하는 프로토콜 오류가 있습니다. PHP는 데이터의 마지막에 도달했을때, 이를 "SSL: Fatal Protocol Error"로 보고합니다. 이를 처리하기 위해서는 error_reporting 레벨에 경고를 포함하지 않도록 해야합니다. PHP 4.3.7 이후는 https:// 래퍼를 통해 스트림을 열 때, 문제가 있는 IIS 서버 소프트웨어를 검출하여 경고를 하지 않습니다. ssl:// 소켓을 만들기 위해 fsockopen()을 사용한다면, 경고를 직접 검출하여 없애야 합니다.
참고
- readfile() - Outputs a file
- fopen() - Opens file or URL
- fsockopen() - Open Internet or Unix domain socket connection
- popen() - Opens process file pointer
- file_get_contents() - Reads entire file into a string
- include() - include
- stream_context_create() - Create a streams context
add a note
User Contributed Notesfile
d basin
14-Oct-2009 10:47
14-Oct-2009 10:47
PenguinMan98 at usa dot net
21-Apr-2008 10:49
21-Apr-2008 10:49
on file() and flock()
My supervisor came up with a brilliant plan to workaround the inability of the file() to work on a flock()'ed file.
We created a dummy file called lockfile.txt. We would flock() lockfile.txt. Once we had a lock on it, we used file() on the file we wanted to read, then altered the file and called fclose on both files.
jon+spamcheck at phpsitesolutions dot com
16-Apr-2008 08:03
16-Apr-2008 08:03
A user suggested using rtrim always, due to the line ending conflict with files that have an EOL that differs from the server EOL.
Using rtrim with it's default character replacement is a bad solution though, as it removes all whitespace in addition to the '\r' and '\n' characters.
A good solution using rtrim follows:
<?php
$line = rtrim($line, "\r\n") . PHP_EOL;
?>
This removes only EOL characters, and replaces with the server's EOL character, thus making preg_* work fine when matching the EOL ($)
vbchris at gmail dot com
16-Feb-2008 09:15
16-Feb-2008 09:15
If you're getting "failed to open stream: Permission denied" when trying to use either file() or fopen() to access files on another server. Check your host doesn't have any firewall restrictions in-place which prevent outbound connections. This is the case with my host Aplus.net
Reversed: moc dot liamg at senroc dot werdna
12-Jul-2007 09:25
12-Jul-2007 09:25
This note applies to PHP 5.1.6 under Windows (although may apply to other versions).
It appears that the 'FILE_IGNORE_NEW_LINES' flag doesn't remove newlines properly when reading Windows-style text files, i.e. files whose lines end in '\r\n'.
Solution: Always use 'rtrim()' in preference to 'FILE_IGNORE_NEW_LINES'.
info at carstanje dot com
28-Nov-2006 08:33
28-Nov-2006 08:33
Using file() for reading large text files > 10 Mb gives problems, therefore you should use this instead. It is much slower but it works fine. $lines will return an array with all the lines.
<?php
$handle = @fopen('yourfile...', "r");
if ($handle) {
while (!feof($handle)) {
$lines[] = fgets($handle, 4096);
}
fclose($handle);
}
?>
richardtcunningham at gmail dot com
11-Jul-2006 09:19
11-Jul-2006 09:19
justin at visunet dot ie's note of 20-Mar-2003 states
"Note: Now that file() is binary safe it is 'much' slower than it used to be. If you are planning to read large files it may be worth your while using fgets() instead of file()."
I tested fgets(), file_get_contents(), and file() on PHP 4.3.2 and PHP 5 and timed each to be under a second with over 200,000 lines. I do not know if he was testing extremely long lines or what, but I could not duplicate the difference that he mentioned.
jonathan dot gotti at free dot fr
01-Feb-2006 10:52
01-Feb-2006 10:52
you can use
$file = array_map('rtrim',file('myfile.txt'));
to remove annoying ending lines of the resulting array.
Nuts
18-Jan-2006 11:16
18-Jan-2006 11:16
WARNING ON WINDOWS:
file() function will add "\r\n" in to the end of the row, even if you use only "\n" char to make rows in the file!
On UNIX systems there is no such problem.
dir @ badblue com
12-Sep-2003 09:48
12-Sep-2003 09:48
Jeff's array2file function is a good start; here are a couple of improvements (no possibility of handle leak when fwrite fails, additional capability of both string2file and array2file; presumably faster performance through use of implode).
<?php
function String2File($sIn, $sFileOut) {
$rc = false;
do {
if (!($f = fopen($sFileOut, "wa+"))) {
$rc = 1; break;
}
if (!fwrite($f, $sIn)) {
$rc = 2; break;
}
$rc = true;
} while (0);
if ($f) {
fclose($f);
}
return ($rc);
}
function Array2File($aIn, $sFileOut) {
return (String2File(implode("\n", $aIn), $sFileOut));
}
?>
If you're generating your string text using a GET or POST from a TEXTAREA (e.g., a mini-web-text-editor), remember that strip_slashes and str_replace of "/r/n" to "/n" may be necessary as well using these functions.
HTH --dir @ badblue com
John
20-Jul-2003 11:32
20-Jul-2003 11:32
after many months of confusion and frustration, i have finally figured out something that i should have noticed the first time around.
you can't file("test.txt") when that same file has been flocked. i guess i didn't have a full understanding of what i was doing when i used flock(). all i had to do was move the flock() around, and all was well.
justin at visunet dot ie
20-Mar-2003 05:36
20-Mar-2003 05:36
Note: Now that file() is binary safe it is 'much' slower than it used to be. If you are planning to read large files it may be worth your while using fgets() instead of file() For example:
<?php
$fd = fopen ("log_file.txt", "r");
while (!feof ($fd))
{
$buffer = fgets($fd, 4096);
$lines[] = $buffer;
}
fclose ($fd);
?>
The resulting array is $lines.
I did a test on a 200,000 line file. It took seconds with fgets() compared to minutes with file().
andrea at brancatelli dot it
16-Mar-2002 07:16
16-Mar-2002 07:16
file() has a strange behaviour when reading file with both \n and \r as line delimitator (DOS files), since it will return an array with every single line but with just a \n in the end. It seems like \r just disappears.
This is happening with PHP 4.0.4 for OS/2. Don't know about the Windows version.
php@don't_spam_me
09-Feb-2002 08:56
09-Feb-2002 08:56
It appears that the file() function causes file access problems for perl cgi scripts accessing the same files. I am using Perl v5.6.0 in linux with PHP/4.0.4pl1. After running a php app using the file() function, any perl cgi trying to access the same file randomly dies returning an internal server error: premature end of script headers.
The simple fix is to use fopen(), fgets() and fclose() instead of file().