rewind

(PHP 4, PHP 5)

rewind — Rewind the position of a file pointer

설명

bool rewind ( resource $handle )

Sets the file position indicator for handle to the beginning of the file stream.

Note:
If you have opened the file in append ("a" or "a+") mode, any data you write to the file will always be appended, regardless of the file position.

인수

handle: The file pointer must be valid, and must point to a file successfully opened by fopen().

반환값

성공할 경우 TRUE를, 실패할 경우 FALSE를 반환합니다.

예제

Example #1 rewind() overwriting example


<?php
$handle = fopen('output.txt', 'r+');

fwrite($handle, 'Really long sentence.');
rewind($handle);
fwrite($handle, 'Foo');
rewind($handle);

echo fread($handle, filesize('output.txt'));

fclose($handle);
?>

위 예제의 출력 예시:

Foolly long sentence.

참고

fread() - Binary-safe file read
fseek() - Seeks on a file pointer
ftell() - Returns the current position of the file read/write pointer
fwrite() - Binary-safe file write

add a note User Contributed Notes rewind - [2 notes]

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MagicalTux at kinoko dot fr ¶

5 years ago


Note that rewind($fd) is exactly the same as fseek($fd, 0, SEEK_SET)



rewind() just moves the location inside the file to the beginning, nothing more. Check if your stream is "seekable" before planning to use fseek/rewind.

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-1

evan at ozhiker dot no_spam dot com ¶

8 years ago


As with fseek(), the rewind() function may not be used on file pointers returned by fopen() if they use the "http://" or "ftp://" formats.

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