Direct IO

Introduction

PHP supports the direct io functions as described in the Posix Standard (Section 6) for performing I/O functions at a lower level than the C-Language stream I/O functions (fopen(), fread(),..). The use of the DIO functions should be considered only when direct control of a device is needed. In all other cases, the standard filesystem functions are more than adequate.

Installing/Configuring
- Installation
- Resource Types
Predefined Constants
Direct IO Functions
- dio_close — Closes the file descriptor given by fd
- dio_fcntl — Performs a c library fcntl on fd
- dio_open — Opens a file (creating it if necessary) at a lower level than the C library input/output stream functions allow
- dio_read — Reads bytes from a file descriptor
- dio_seek — Seeks to pos on fd from whence
- dio_stat — Gets stat information about the file descriptor fd
- dio_tcsetattr — Sets terminal attributes and baud rate for a serial port
- dio_truncate — Truncates file descriptor fd to offset bytes
- dio_write — Writes data to fd with optional truncation at length