# posix_get_last_error

(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)

posix_get_last_error — Retrieve the error number set by the last posix function that failed

### 说明

posix_get_last_error(): int

Retrieve the error number set by the last posix function that failed. The system error message associated with the errno may be checked with posix_strerror().

### 参数

此函数没有参数。

### 返回值

Returns the errno (error number) set by the last posix function that failed. If no errors exist, 0 is returned.

### 示例

示例 #1 posix_get_last_error() example

This example attempt to kill a bogus process id, which will set the last error. We will then print out the last errno.

`<?php
posix_kill(999459,SIGKILL);
echo 'Your error returned was '.posix_get_last_error(); //Your error was ___
?>`

### 参见

- posix_strerror() - Retrieve the system error message associated with the given errno

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