pcntl_get_last_error

(PHP 5 >= 5.3.4, PHP 7, PHP 8)

pcntl_get_last_errorRetrieve the error number set by the last pcntl function which failed

说明

pcntl_get_last_error(): int

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

参数

此函数没有参数。

返回值

Returns the error number (errno) set by the last pcntl function that failed. If there was no error, 0 is returned.

示例

示例 #1 pcntl_get_last_error() example

This example will attempt to wait on child processes in a situation where no child process exists, then will print out the corresponding error message.

<?php
$pid
= pcntl_wait($status);
if (
$pid === -1) {
$errno = pcntl_get_last_error();
$message = pcntl_strerror($errno);
fwrite(STDERR, 'pcntl_wait failed with errno ' . $errno
. ': ' . $message . PHP_EOL);
}

以上示例的输出类似于:

pcntl_wait failed with errno 10: No child processes

参见

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