pcntl_strerror

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

pcntl_strerror — Retrieve the system error message associated with the given errno

Description

pcntl_strerror(int $error_code): string

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().

Parameters

error_code: An error number (errno), returned by pcntl_get_last_error().

Return Values

Returns the error message, as a string.

Examples

Example #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);
}

The above example will output something similar to:

pcntl_wait failed with errno 10: No child processes

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