The set_file_buffer() function sets the buffer size of an open file. The function returns 0 on success, otherwise it returns EOF.
Syntax
set_file_buffer(file_pointer, buffer)
Parameters
file_pointer − The file pointer.
buffer − The buffer size in bytes.
Return
The set_file_buffer() function returns 0 on success, otherwise it returns EOF.
Example
<?php
$file_pointer = fopen("new.txt","w");
$res = set_file_buffer($file_pointer,300);
if($res)
echo "buffer set";
else
echo "buffer not set";
?>Output
buffer set