(PHP 5 >= 5.3.3, PHP 7, PHP 8)
stream_set_read_buffer — Set read file buffering on the given stream
$stream, int $size): intSets the read buffer. It's the equivalent of stream_set_write_buffer(), but for read operations.
streamThe file pointer.
size
The number of bytes to buffer. If size
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.
Returns 0 on success, or another value if the request cannot be honored.