   #PHP Manual Direct IO functions dio_open dio_seek

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                                   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 fd. If n is not specified, dio_read() reads 1K sized block
   and returns them.
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