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file_put_contents

(PHP 5)

file_put_contentsWrite a string to a file

설명

int file_put_contents ( string $filename , mixed $data [, int $flags= 0 [, resource $context ]] )

This function is identical to calling fopen(), fwrite() and fclose() successively to write data to a file.

If filename does not exist, the file is created. Otherwise, the existing file is overwritten, unless the FILE_APPEND flags 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 (with some restrictions), 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. Mutually exclusive with LOCK_EX since appends are atomic and thus there is no reason to lock.
LOCK_EX Acquire an exclusive lock on the file while proceeding to the writing. Mutually exclusive with FILE_APPEND.
FILE_TEXT data is written in text mode. If unicode semantics are enabled, the default encoding is UTF-8. You can specify a different encoding by creating a custom context or by using the stream_default_encoding() to change the default. This flag cannot be used with FILE_BINARY. This flag is only available since PHP 6.
FILE_BINARY data will be written in binary mode. This is the default setting and cannot be used with FILE_TEXT. This flag is only available since PHP 6.

context

A valid context resource created with stream_context_create().

반환값

The function returns the number of bytes that were written to the file, or FALSE on failure.

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$personFILE_APPEND LOCK_EX);
?>

변경점

버전 설명
5.0.0 Added context support
5.1.0 Added support for LOCK_EX and the ability to pass a stream resource to the data parameter
6.0.0 Added support for the FILE_TEXT and FILE_BINARY flags

주의

Note: 이 함수는 바이너리 안전입니다.

Tip

fopen 래퍼를 활성화하면, 파일명으로 URL을 사용할 수 있습니다. 파일 이름을 지정하는 방법은 fopen()을, 지원하는 URL 프로토콜 목록은 지원 프로토콜/래퍼 목록를 참고하십시오.

참고


파일시스템 함수 목록
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