PHP Manual
Stream 函数
Set read file buffering on the given stream

stream_set_read_buffer

(PHP 5 >= 5.3.3, PHP 7)

stream_set_read_buffer — Set read file buffering on the given stream

说明

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

Sets the read buffer. It's the equivalent of stream_set_write_buffer(), but for read operations.

参数

stream: The file pointer.
buffer: The number of bytes to buffer. If buffer is 0 then read operations are unbuffered. This ensures that all reads with fread() are completed before other processes are allowed to read from that input stream.

返回值

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

参见

stream_set_write_buffer() - Sets write file buffering on the given stream

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