Detailed error on fopen

问题

I'm using fopen to read from a file

$fh = fopen($path, 'r') or die('Could not open file');

Now I contantly get error Could not open file. I checked the file path and even changed the permissions of the file to 777. Is there a way I can get a detailed error report as why the file can't be opened similar to mysql_error()?

回答1:

Turn on error reporting, or, in a production environment (from PHP 5.2.0 onwards) you should also be able to use error_get_last().

回答2:

For php versions prior to 5.2 (lacking error_get_last()) you can use track_errors.

ini_set('track_errors', 1);
$fh = fopen('lalala', 'r');
if ( !$fh ) {
  echo 'fopen failed. reason: ', $php_errormsg;
}

see also: http://de.php.net/reserved.variables.phperrormsg

回答3:

Yes.
PHP has detailed error message for you.
You just have to turn it on.

To dislay it on the screen add these 2 lines at the top of the script:

ini_set('display_errors',1);
error_reporting(E_ALL);

Or if you want it to be logged instead,

ini_set('log_errors',1);
ini_set('display_errors',0);
error_reporting(E_ALL);

Also note that using die() is very bad practice.

回答4:

$fh = fopen($path, 'r') or  die (error_get_last());

来源：https://stackoverflow.com/questions/2470217/detailed-error-on-fopen