How to enable error reporting in nginx php config - php

I have been trying for three days now to enable error reporting in PHP. I have gotten by for a while using the ini_set('display errors' 1); function until I tried to connect to a DB; it didn't work. Now, I have enabled error_reporting, display_startup_errors, log_errors without any effect on error reporting. I have changed all five config files (the development ini, production ini, the php.ini file(s) located in php/7.0/cli, php/7.0/fpm, and even the one in apache2 (even though I am running nginx)
I am beginning to doubt my own abilities, any assistance is greatly appreciated.
EDIT: I have used the ini_set function described above in my files, and it worked up until I tried to connect to a DB. I have confirmed that I've enabled error reporting for the php.ini file described in the phpinfo() function directory path. No effect whatsoever.

Because no one particularily gave away the answer, I will just have to post it myself.
I found the error.log file (which indeed is logging all errors on my Nginx server) in this directory: /var/log/nginx/error.log
Hopefully this may help others using Nginx as well, but I still do not understand why the **** the errors aren't showing up in the browser. I think it is Nginx's nature to make everything quite complicated.
Perhaps I should develop using Apache and then port it into Nginx when I have more experience -- just some thoughts for others who are getting into this as well.
I just wanted to give an update on this: Since upgrading from PHP 7.0.2 <= 7.0.3, I am now able to see the errors that should have been displayed.
EDIT: Don't delete the contents of that log file, it will screw the whole error reporting. I'm back to nothing now. –

Error Reporting Itself
ini_set('display_errors', 1); or display_errors
Simply allows PHP to output errors - useful for debugging, highly recommended to disable for production environments. It often contains information you'd never want users to see.
error_reporting(E_ALL); or error_reporting
Simply sets exactly which errors are shown.
Setting one or the other will not guarantee that errors will be displayed. You must set both to actually see errors on your screen.
As for setting this up permanently inside your PHP config, the default for error_reporting is E_ALL & ~E_NOTICE & ~E_STRICT & ~E_DEPRECATED. That said, this variable should not need changed. See here:
http://php.net/manual/en/errorfunc.configuration.php#ini.error-reporting
As for displaying errors, see here:
http://php.net/manual/en/errorfunc.configuration.php#ini.display-errors
Set the config value of "display_errors" to either stderr or stdout, depending on your need.
Just change these variables inside of your php.ini file and you'll be golden. Make absolutely sure both display_errors and error_reporting is set to a satisfactory value. Just setting error_reporting will not guarantee that you see the errors you're looking for!
Error Reporting Works Everywhere Except When Connecting To My DB!
If you see errors everywhere you need to except in the Database Connection, you just need to do some error catching. If it's PDO, do something like this:
try {
$this->DBH->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION );
$this->DBH->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
$STH = $this->DBH->prepare("INSERT INTO `" . $this->table . "` ($fs) value ($ins) $up");
$STH->execute($data);
$id = $this->DBH->lastInsertId();
$this->closeDb();
return $id;
} catch(PDOException $e) {
echo $e->getMessage();
}
Just a snippet from my framework. Of course you'll have to change it to your liking, but you should be able to get the general idea there. They key is this part here:
try {
//DB Stuff
} catch(PDOException $e) {
echo $e->getMessage();
}
I Still Don't See The Error
If you've done both of what I've listed here and still have trouble, your problem has nothing to do with enabling error reporting. The code provided will show you the error with a Database Connection itself, and inside of PHP code. You must have a completely different issue if this has not shown you an error you're chasing.
You'll likely need to be a bit more descriptive on exactly what you're chasing, and what you're expecting to see.

Try:
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);

perhaps, it will help you. change values of parameteres
in the file /etc/php/7.0/fpm/pool.d/www.conf (for example value display_errors by default is disabled)

Related

php - What error reporting level I should use on end user website, which is complete

What is the most convenient way of error reporting in finished website? I would like to still log exceptions and errors to external file. I definitely don't want the user to see anything more than "Error: something went wrong, we are lookin into it".
Does my try - catch work and can I log my Exceptions if I set:
error_reporting(0);
In your php.ini file you should hide errors:
display_errors = Off
If you want to know about any errors that occur (you should care) you should turn on error logging:
log_errors = On
How to set error reporting depends on what errors you want to know about. Ideally you should want to know about everything (maybe except errors about deprecated stuff; if the website is already done then you should have fixed any such errors). See this page for more information.
; Show everything except deprecated errors
error_reporting = E_ALL & ~E_DEPRECATED
And then there are a few more things you can set:
; It makes little sense to have this on
html_errors = Off
; Set this to where your log file should be stored
error_log = /path/to/log/file.log
; Maybe more, see link below...
You can see some more options here.
Restart your server after making changes to php.ini.

show error instead of "Server Error"

I have recently changed hosts, on my old host if i had an error in my syntax the error would be displayed (showing me where the error was)
On my new host i do not see this, i just see
The website encountered an error while retrieving http://www.XXX.co.uk/delete_product.php?q=66550. It may be down for maintenance or configured incorrectly.
Is there any way i can show the error instead of this?
Turn on error reporting.
Include these lines are the top of your script:
ini_set('display_errors',1);
error_reporting(E_ALL);
If you have access to edit the php.ini file, you can edit it and include the following option:
error_reporting = E_ALL
These settings will help you troubleshoot code faster and makes it easy to identify errors. However, it is not appropriate for a production-level use. You should use the first method and then you can remove the lines once you've fixed the issues. On local development environments, it's okay to edit php.ini file and add the directive as mentioned above.
On production systems, do not use ini_set('display_errors', 1); as it can show information you might want to keep hidden. Use the server's logs instead. By default apache for example logs these errors in error_log.
And, anything that is open to the general internet public is considered "production" in my opinion. Development means it is a server sitting in your own local network.
Turning on error reporting would work, but perhaps it would be better to look into the server logs.

PHP errors make page inaccessible

Every time I have an error within my code and try to run it, the page becomes inaccessible. This is clearly very frustrating as it's hard debugging code with no feedback.
Relevant information from cPanel:
Apache version 2.2.22
PHP version 5.3.14
MySQL version 5.1.68-cll
Architecture x86_64
Operating system linux
If more information is required then please ask, I'm sorry I cannot provide any more information but frankly I am stumped.
Thanks.
Enable error reporting to see what error PHP had, if it had one.
There are several places you can look, firstly try checking your Apache error log. In many cases this is located in /var/log/apache2/error.log . Another way to debug a page like this is to enable error logging.
The simplest way of doing this being adding these lines to your php file:
ini_set('display_errors',1);
error_reporting(E_ALL);
In addition to this, you can also clean up the errors formatting by adding:
ini_set('html_errors', 'On');
In addition to this method of enabling error reporting, you may also enable them from you configuration file by adding the following line:
error_reporting = E_ALL
You need to update your php.ini to display errors. There are a couple settings.
Search your php.ini for display_errors and error_reporting. The file is usually commented very well on the options for error reporting, but error_reporting = E_ALL is a typical setting. Sometimes people want to suppress notices and set error_reporting to E_ALL & ~E_NOTICE.
display_errors = On is the config to print the errors to the screen.
After changing your php.ini, Apache usually needs to be restarted. I'm not sure how much control you have over your server, so if you can't restart Apache but you have a php.ini available, your host probably has it configured so you don't need to restart.

PHP doesn't display any error

I don't get any PHP error, just get a white page on Firefox, and
Server error
The website encountered an error while retrieving http://example.com/pruebas/prov.php. It may be down for maintenance or configured incorrectly
on Chrome.
This is the code:
if (!ini_get('display_errors')) {
ini_set('display_errors', 1);
}
echo "hola"
echo "hola2";
I intentionally made mistake in the echo "hola" (there's no ';').
I also tried adding to the end of my .htaccess file -> suPHP_ConfigPath /home/username/public_html replacing username with my current username, and then I created a php.ini in public_html with "display_errors = on;". But I'm still not able to get any PHP error.
Your script is dying due to the syntax error before it ever executes, so the ini_set() call is never executed and never takes effect. You'd have to change the setting in the appropriate php.ini.
The actual error message may be in a log file somewhere. Try Apache's error_log, or see if PHP's logging somewhere else.
Make sure that you also have the appropriate error_reporting ini value set as well. You can find more information on PHP.net
Set the error reporting level. The parameter is either an integer representing a bit field, or named constants. The error_reporting levels and constants are described in Predefined Constants, and in php.ini. To set at runtime, use the error_reporting() function. See also the display_errors directive.
In PHP 4 and PHP 5 the default value is E_ALL & ~E_NOTICE. This setting does not show E_NOTICE level errors. You may want to show them during development.
Source
Make sure the display_errors is set to on on your php.ini file.

How to only show PHP errors to myself?

I've seen a few methods for hiding php errors using php.ini or by adding php_flag display_errors off to .htaccess, but I'm wondering if there's a way to make it so only I can see php errors (useful for debugging obviously), but anyone else will be redirected to some boilerplate error page. I have a few scripts on my site that use my forum to authenticate me as an admin and kick everyone else out, so maybe it's possible using the same method?
If this isn't possible, I guess I'll go with the .htaccess method since I don't have access to php.ini. Is adding php_flag display_errors off to .htaccess a good way to go for this?
Thanks!
While displaying errors on screen is great for development (as you see them right away), they should not be enabled for production servers because you may accidentally expose sensitive information (e.g., database passwords) to unauthorized users.
The useful INI options are:
ini_set('error_reporting', E_ALL & ~E_NOTICE);
ini_set('error_log', '/path/to/my/php.log');
ini_set('log_errors', 'On'); // log to file (yes)
ini_set('display_errors', 'Off'); // log to screen (no)
With that, all errors will be logged to the specified file. No errors will be seen on the screen.
Make sure the web server user is able to write to that file. You may have to create it and chmod / chown it accordingly before running your script.
On private development servers, you could disable the log file and display directly to screen. When developing, I would also get in the habit of displaying E_NOTICE errors as well. (Just use E_ALL as the value.) And if your scripts are well written, you can then continue to log them while in production too. An E_NOTICE is good for catching typos in variable names or array indices.
Note that all of those options can also be set in the php.ini or .htaccess files. But if you use .htaccess you cannot use the E_* constants; instead, you must hardcode the integer representation. (i.e., In a .htaccess file, you use whatever the results of <?php echo E_ALL ?> show as the value, or whatever you wish to log.)
In fact, I would recommend setting them in the php.ini if at all possible. Otherwise, if there's a script parsing error (or the ini_set gets skipped for some reason), you may not get the errors logging properly, etc.
On a Linux box you can always do a tail -f /path/to/my/php.log from a shell to monitor the log in realtime.
Although I agree with konforce, this is possible by setting the error reporting at runtime with the error_reporting() function. If you insist on doing that, put it in the same block of code that you mentioned for determining you are the admin, so that you don't have the decision made in different places.
Since your code already knows you are an admin you can use a logic like this:
if($_SESSION['isadmin']==1){
ini_set('display_errors', 1);
ini_set('log_errors', 1);
}
The admins will see errors but the other users will not see the errors.
You can check against the users IP, and if it matches yours, you can show errors.
Something like this:
if($_SERVER['REMOTE_ADDR'] == 'your.ip.address'){
error_reporting(E_ALL);
} else {
error_reporting(0);
}
If you don't know you external IP, just google "what is my ip" or similar.
Base case scenario is obviously having a dev-server.
if you have a users system, set the codes so it recognize you when you log in, and show errors. So, it will only show errors when it's you who is logged in.

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