Php/docs/function.stream-set-write-buffer

• PHP Manual
• Stream 函数
• Sets write file buffering on the given stream

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 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.

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);}?>

参见

• fopen() - 打开文件或者 URL
• fwrite() - 写入文件（可安全用于二进制文件）