Gossamer Forum: General: Perl Programming: Whats this @?

Dec 8, 2001, 9:17 AM

Andy

Veteran / Moderator (18441 posts)

Dec 8, 2001, 9:17 AM

Post #1 of 5

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Whats this @?

Hi. Just found some code at PHP.net, it is;

Code:
if(!@is_dir("/your/path")){  
echo "Dir does not exist!";  
mkdir("/your/path",0777);  
}

What exactly does the @ do? Anyone who does PHP programming know? Why not just use;

Code:
if(!@is_dir("/your/path")){  
echo "Dir does not exist!";  
mkdir("/your/path",0777);  
}

Thanks

Andy (mod)
andy@ultranerds.co.uk

Dec 8, 2001, 11:21 AM

Mark Badolato

Veteran (1509 posts)

Dec 8, 2001, 11:21 AM

Post #2 of 5

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Re: [AndyNewby] Whats this @? In reply to

The @ supresses errors. So if that statement were to not find the directory, rather than php sending some php error about it not existing, you can supress that error and pront yor own, like is being done there

--mark

Dec 9, 2001, 11:24 PM

Andy

Veteran / Moderator (18441 posts)

Dec 9, 2001, 11:24 PM

Post #3 of 5

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Re: [Mark Badolato] Whats this @? In reply to

Ah cool. I can see that being quite useful. That was one of PHPs things I wasnt that keen on; not being able to define you own error messages. Not wanting to be cheeky, but I wonder if you could answer me another question. In Perl we have the $! and $@ variables for error reporting, is there a similar variable in PHP that reports the returned error?

Thanks

Andy (mod)
andy@ultranerds.co.uk

Last edited by:

AndyNewby: Dec 9, 2001, 11:25 PM

Dec 10, 2001, 12:38 AM

brewt

Staff (4101 posts)

Dec 10, 2001, 12:38 AM

Post #4 of 5

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Re: [AndyNewby] Whats this @? In reply to

$php_errormsg is a global variable you can use. Here's an example:

Code:
$my_file = @file ('non_existent_file') or die ("Failed opening file: error was '$php_errormsg'");

That is, if track_errors is turned on.

Adrian

Last edited by:

brewt: Dec 10, 2001, 12:39 AM

Dec 10, 2001, 6:39 AM

Andy

Veteran / Moderator (18441 posts)

Dec 10, 2001, 6:39 AM

Post #5 of 5

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Re: [brewt] Whats this @? In reply to

Thanks

Andy (mod)
andy@ultranerds.co.uk