How to bypass warning message in fopen?

[weifan]

Hi,

I use fopen to get data from a website with different ID number.

for ($count = 1; $count <= 10; ++$count) {
$url=&quot;

http://www.abc.com/info.asp?id=$count&quot;;

preg_match(&quot;/^(https?:\/\/)?([^\/]*)(.*)/i&quot;, &quot;$url&quot;, $matches);
$domain = &quot;

http://&quot;

. $matches[2];
$page = $matches[3];
$fd = fopen($domain.$page, &quot;rb&quot;
$code = &quot;&quot;;
while(!feof($fd)){
$code .= fread($fd, 1000);
}
fclose($fd);

However, I get warning messages and the program will not stop or need to wait for a long long time, if the id is invalid.

How can I bypass the loop if the id in not valid?

Thanks,

Roger

 

[ingresman]

I'm not quite sure what you mean by bypass the loop, what you can do is prefxi the fopen with a @ i.e $fd=@fopen(.. This stops PHP reporting the error, you will have to handle it, your code will look something like:

$fd=@fopen($domain....);
if ($fd == NULL) {
echo &quot;not found&quot;;
else
{
you app code;
}

Check the manual for what comes back from fopen on a bad open. I think you alos need url in fopen switched on in the php.ini file or at run time, back to the manual again !

 

[weifan]

Thanks, it works!

 

[sleipnir214]

As a good rule, use of the &quot;@&quot; error-suppression operator should be avoided.

In the case of errors with fopen(), use of functions like file_exists() (

http://us2.php.net/manual/en/function.file-exists.php),

is_readable() (

http://us2.php.net/manual/en/function.is-readable.php),

and is_writable() (

http://us2.php.net/manual/en/function.is-writable.php)

can be used to gracefully catch errors rather than just stopping them from being displayed.

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