file_put_contents
(PHP 5, PHP 7)
file_put_contents — Write a string to a file
설명
int file_put_contents
(
string $filename
,
mixed $data
[,
int $flags = 0
[,
resource $context
]] )
If filename does not exist, the file is created.
Otherwise, the existing file is overwritten, unless the
FILE_APPEND flag is set.
인수
-
filename
-
Path to the file where to write the data.
-
data
-
The data to write. Can be either a string, an
array or a stream resource.
If data is a stream resource, the
remaining buffer of that stream will be copied to the specified file.
This is similar with using stream_copy_to_stream().
You can also specify the data parameter as a single
dimension array. This is equivalent to
file_put_contents($filename, implode('', $array)).
-
flags
-
The value of flags can be any combination of
the following flags, joined with the binary OR (|)
operator.
Available flags
| Flag |
Description |
FILE_USE_INCLUDE_PATH
|
Search for filename in the include directory.
See include_path for more
information.
|
FILE_APPEND
|
If file filename already exists, append
the data to the file instead of overwriting it.
|
LOCK_EX
|
Acquire an exclusive lock on the file while proceeding to the
writing. In other words, a flock() call happens
between the fopen() call and the
fwrite() call. This is not identical to an
fopen() call with mode "x".
|
-
context
-
A valid context resource created with
stream_context_create().
반환값
This function returns the number of bytes that were written to the file, or
FALSE on failure.
Warning이 함수는 논리 FALSE를
반환하지만, 논리 FALSE로 취급할 수 있는 다른 값을 반환할 수 있습니다. 자세한 정보는 논리형 섹션을 참고하십시오.
이 함수의 반환값을 확인하려면
=== 연산자를
이용하십시오.
예제
Example #1 Simple usage example
<?php
$file = 'people.txt';
// Open the file to get existing content
$current = file_get_contents($file);
// Append a new person to the file
$current .= "John Smith\n";
// Write the contents back to the file
file_put_contents($file, $current);
?>
Example #2 Using flags
<?php
$file = 'people.txt';
// The new person to add to the file
$person = "John Smith\n";
// Write the contents to the file,
// using the FILE_APPEND flag to append the content to the end of the file
// and the LOCK_EX flag to prevent anyone else writing to the file at the same time
file_put_contents($file, $person, FILE_APPEND | LOCK_EX);
?>
주의
Note: 이 함수는 바이너리
안전입니다.