(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)
stream_set_write_buffer — Sets write file buffering on the given stream
$stream, int $buffer): int
Sets the buffering for write operations on the given stream
to buffer bytes.
streamThe 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.
Returns 0 on success, or another value if the request cannot be honored.
示例 #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);
}
?>