Direct IO
PHP Manual

简介

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.

Note:

此扩展已被移至 » PECL 资源库且不再与 PHP 捆绑。5.1.0.

This extension is only available on Windows Platforms as of PHP 5.0.0

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Direct IO
PHP Manual