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POSIX

This module contains an interface to those functions defined in the IEEE 1003.1 (POSIX.1) standards document which are not accessible through other means.

Intro

This module contains an interface to those functions defined in the IEEE 1003.1 (POSIX.1) standards document which are not accessible through other means.

Warning

Sensitive data can be retrieved with the POSIX functions, e.g. posix_getpwnam() and friends.

Extension

Setup Constants Reference

Source: reference/posix/book.xml · from the official PHP manual (php/doc-en)