stream_set_write_buffer
(PHP 4 >= 4.3.0, PHP 5, PHP 7)
stream_set_write_buffer — Sets write file buffering on the given stream
说明
stream_set_write_buffer
( resource
$stream
, int $buffer
) : int
Sets the buffering for write operations on the given stream
to buffer bytes.
参数
-
stream -
The file pointer.
-
buffer -
The number of bytes to buffer. If
bufferis 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.
返回值
Returns 0 on success, or another value if the request cannot be honored.
范例
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 ($fp) {
if (stream_set_write_buffer($fp, 0) !== 0) {
// changing the buffering failed
}
fwrite($fp, $output);
fclose($fp);
}
?>