(PHP 4 >= 4.3.0, PHP 5, PHP 7)
file_get_contents — Reads entire file into a string
$filename
[, bool $use_include_path
= false
[, resource $context
[, int $offset
= 0
[, int $maxlen
]]]] )
This function is similar to file(), except that
file_get_contents() returns the file in a
string, starting at the specified offset
up to maxlen
bytes. On failure,
file_get_contents() will return FALSE
.
file_get_contents() is the preferred way to read the contents of a file into a string. It will use memory mapping techniques if supported by your OS to enhance performance.
Note:
If you're opening a URI with special characters, such as spaces, you need to encode the URI with urlencode().
filename
Name of the file to read.
use_include_path
Note:
As of PHP 5 the
FILE_USE_INCLUDE_PATH
constant can be used to trigger include path search.
context
A valid context resource created with
stream_context_create(). If you don't need to use a
custom context, you can skip this parameter by NULL
.
offset
The offset where the reading starts on the original stream. Negative offsets count from the end of the stream.
Seeking (offset
) is not supported with remote files.
Attempting to seek on non-local files may work with small offsets, but this
is unpredictable because it works on the buffered stream.
maxlen
Maximum length of data read. The default is to read until end of file is reached. Note that this parameter is applied to the stream processed by the filters.
The function returns the read data 실패 시 FALSE
를 반환합니다.
An E_WARNING
level error is generated if filename
cannot be found, maxlength
is less than zero, or if seeking to the specified offset
in the stream fails.
Example #1 Get and output the source of the homepage of a website
<?php
$homepage = file_get_contents('http://www.example.com/');
echo $homepage;
?>
Example #2 Searching within the include_path
<?php
// <= PHP 5
$file = file_get_contents('./people.txt', true);
// > PHP 5
$file = file_get_contents('./people.txt', FILE_USE_INCLUDE_PATH);
?>
Example #3 Reading a section of a file
<?php
// Read 14 characters starting from the 21st character
$section = file_get_contents('./people.txt', NULL, NULL, 20, 14);
var_dump($section);
?>
위 예제의 출력 예시:
string(14) "lle Bjori Ro"
Example #4 Using stream contexts
<?php
// Create a stream
$opts = array(
'http'=>array(
'method'=>"GET",
'header'=>"Accept-language: en\r\n" .
"Cookie: foo=bar\r\n"
)
);
$context = stream_context_create($opts);
// Open the file using the HTTP headers set above
$file = file_get_contents('http://www.example.com/', false, $context);
?>
버전 | 설명 |
---|---|
7.1.0 |
Support for negative offset s has been added.
|
5.1.0 |
Added the offset and
maxlen parameters.
|
Note: 이 함수는 바이너리 안전입니다.
fopen 래퍼를 활성화하면, 파일명으로 URL을 사용할 수 있습니다. 파일 이름을 지정하는 방법은 fopen()을 참고하십시오. 다양한 래퍼의 기능, 사용법, 제공하는 예약 정의 변수들에 대해서는 Supported Protocols and Wrappers를 참고하십시오.
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.