dio_read
    (PHP 4 >= 4.2.0)
dio_read -- 
     Reads n bytes from fd and returns them, if n is not specified,
     reads 1k block
    
Description
string 
dio_read ( resource fd [, int n])
     The function dio_read() reads and returns
     n bytes from file with descriptor
     resource. If n is
     not specified, dio_read() reads 1K sized block
     and returns them.