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socket_strerror

(PHP 4 >= 4.1.0)

socket_strerror -- Return a string describing a socket error

Description

string socket_strerror ( int errno)

Warnung

Diese Funktion ist EXPERIMENTELL. Das Verhalten, der Funktionsname und alles Andere was hier dokumentiert ist, kann sich in zukünftigen PHP-Versionen ohne Ankündigung ändern. Seien Sie gewarnt und verwenden Sie diese Funktion auf eigenes Risiko.

socket_strerror() takes as its errno parameter a socket error code as returned by socket_last_error() and returns the corresponding explanatory text. This makes it a bit more pleasant to figure out why something didn't work; for instance, instead of having to track down a system include file to find out what '-111' means, you just pass it to socket_strerror(), and it tells you what happened.

Beispiel 1. socket_strerror() example

<?php
if (false == ($socket = @socket_create(AF_INET, SOCK_STREAM, 0))) {
   echo "socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "\n";
} 

if (false == (@socket_bind($socket, '127.0.0.1', 80))) {
   echo "socket_bind() failed: reason: " . socket_strerror(socket_last_error($socket)) . "\n";
}
?>

The expected output from the above example (assuming the script is not run with root privileges): 
socket_bind() failed: reason: Permission denied

See also socket_accept(), socket_bind(), socket_connect(), socket_listen(), and socket_create().

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