How to handle fsockopen error in PHP? - php

Question

try {
$fp = fsockopen($site, $port, $errno, $errstr, 2);
}
catch(Exception $ex) {
echo 'error';
}
Why is the catch not working, while I'm see that warnings are given for fsockopen
Warning: fsockopen(): php_network_getaddresses: getaddrinfo failed: No such host is known.
and
Warning: fsockopen(): unable to connect to www.myrandsitedf.net:80 (php_network_getaddresses: getaddrinfo failed: No such host is known. )
I know that I can use # to suppress the error/warning messages, but I don't think that this is the right way to handle an error.
Also the Cronjob at my host doesn't allow PHP files with errors in it, # doesn't solve it.

Answer 1

You have to use the exception with global namespace.
Try this code:
try {
$fp = fsockopen($site, $port, $errno, $errstr, 2);
}
catch(\Exception $ex) { //used back-slash for global namespace
echo 'error';
}
This will work in php 5.3 or later.
Thanks.

Answer 2

You have to make the difference between exceptions and errors.
If you want errors (warning, etc...) to be transformed into exception such that they can be caught in the catch, you should register a error_handler that converts the error into an exception:
function error_handler($errno, $errstr, $errfile, $errline)
{
if( ($errno & error_reporting()) > 0 )
throw new ErrorException($errstr, 500, $errno, $errfile, $errline);
else
return false;
}
set_error_handler('error_handler');

Answer 3

The easy and proper way to do this
try {
$fp = #fsockopen($ip, $port, $errno, $errstr, 5);
#fclose($fp);
return true;
} catch (\Exception $th) {
// return "error";
return $th;
}