pcntl_get_last_error
PHP function
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(PHP 5 >= 5.3.4, PHP 7, PHP 8)
Retrieve the error number set by the last pcntl function which failed
Description
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().
Parameters Parameters
Return Values
Returns the error number (errno) set by the last pcntl function that failed. If there was no error, 0 is returned.
Examples
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
<?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);
}The above example will output something similar to:
output
pcntl_wait failed with errno 10: No child processes