PHP Warning when using include_once()

Question

When I try to include a file using include_once in php which shows warning like

Warning: include_once(1) [function.include-once]: failed to open stream: No such file or directory in /var/www/test/content_box.php on line 2

Actually file is there in my directory.I am using ubuntu (OS) How can we prevent this warning?

Answer 1

Note: My answer below has turned out to be popular, but I didn't really answer the question properly. It's not about suppressing the warning, it's about fixing the bug that caused the warning. I'll leave it here for posterity.

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The proper way to prevent the warning would be to check if the first exists first and don't try to include it if it doesn't.

if (file_exists($includefile)) {
  include_once($includefile);
}

(obviously replace $includefile with the file you're including)

The quick and dirty way to do it, which I DO NOT recommend, would be to suppress the warning with the @ expression.

@include_once($includefile);

Note that when suppressing a warning this way, PHP's error handling code still runs but with PHP's error_reporting ini value temporarily changed to ignore it. As a rule of thumb this isn't a good idea because it can mask other errors.

As others have pointed out, "1" is an unusual filename for a PHP file, but I'll assume you have a specific reason for doing that.

Answer 2

Obviously the issue here is that PHP can't find the file you're trying to include. To reduce confusion about what the current path is, I usually make it an absolute path like this:

// inc.php is in the same directory:
include (dirname(__FILE__) . "/inc.php");

// inc.php is in a subdirectory
include (dirname(__FILE__) . "/folder/inc.php");

// inc.php is in a parent directory
include (dirname(dirname(__FILE__)) . "inc.php");

It's probably a bit over the top, but you can be sure to know where PHP is looking for your files.

Answer 3

that's quite unusual name for the php file - a single digit 1. are you sure you have such a file?