stream_set_write_buffer

(PHP 4 >= 4.3.0, PHP 5, PHP 7)

stream_set_write_bufferSets write file buffering on the given stream

Descrizione

stream_set_write_buffer ( resource $stream , int $buffer ) : int

Sets the buffering for write operations on the given stream to buffer bytes.

Elenco dei parametri

stream

The file pointer.

buffer

The number of bytes to buffer. If buffer is 0 then write operations are unbuffered. This ensures that all writes with fwrite() are completed before other processes are allowed to write to that output stream.

Valori restituiti

Returns 0 on success, or another value if the request cannot be honored.

Esempi

Example #1 stream_set_write_buffer() example

The following example demonstrates how to use stream_set_write_buffer() to create an unbuffered stream.

<?php
$fp 
fopen($file"w");
if (
$fp) {
  if (
stream_set_write_buffer($fp0) !== 0) {
      
// changing the buffering failed
  
}
  
fwrite($fp$output);
  
fclose($fp);
}
?>

Vedere anche:

  • fopen() - Apre un file o un URL
  • fwrite() - Scrive un file salvaguardando la corrispondenza binaria
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User Contributed Notes 1 note

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kevin at bonnevillessei dot com
2 years ago
Trying to use stream_set_write_buffer on a local file will always fail according to this note from 2003.

http://grokbase.com/t/php/php-internals/0351gp6xtn/stream-set-write-buffer-does-not-work

Example:

$fp = fopen("localfile.txt", "w");
if (stream_set_write_buffer($fp, 0) !== 0) {
    // changing the buffering failed is always true on local files
}
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