rewind

(PHP 4, PHP 5, PHP 7)

rewindRewind the position of a file pointer

Descrierea

rewind ( resource $stream ) : bool

Sets the file position indicator for stream 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 pointer position.

Parametri

stream

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

Valorile întoarse

Întoarce valoarea true în cazul succesului sau false în cazul eșecului.

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($handlefilesize('output.txt'));

fclose($handle);
?>

Exemplul de mai sus va afișa ceva similar cu:

Foolly long sentence.

A se vedea și

  • 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

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User Contributed Notes 1 note

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13
MagicalTux at kinoko dot fr
16 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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