rewind

(PHP 4, PHP 5)

rewind — Rewind the position of a file pointer

Descrierea

bool rewind ( resource $handle )

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

Notă: 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.

Parametri

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

Valorile întroarse

Întoarce valoarea TRUE în cazul succesului sau FALSE în cazul eşecului.

Exemple

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);
?>

Exemplul de mai sus va afişa ceva similar cu:

Foolly long sentence.

Vedeţi de asemenea

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

rmdir

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Last updated: Fri, 06 Nov 2009

add a note User Contributed Notes
rewind

MagicalTux at kinoko dot fr
27-Nov-2007 02:53


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.

berndt at www dot michael - berndt dot de
05-May-2005 03:27


little counter with rewind()

http://www.michael-berndt.de/ie/tux/counter.htm

evan at ozhiker dot no_spam dot com
05-Aug-2004 11:56


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

add a note

rmdir

rename

Last updated: Fri, 06 Nov 2009