(PHP 5 >= 5.3.4, PHP 7, PHP 8)
pcntl_strerror — Retrieve the system error message associated with the given errno
Returns the system error message associated with the given error_code
(errno) of the last pcntl function that failed.
The error_code parameter may be obtained by calling
pcntl_get_last_error().
error_code
An error number (errno),
returned by pcntl_get_last_error().
Returns the error message, as a string.
示例 #1 pcntl_strerror() 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