my boss says "when I try to serf the website I get a server error... after a reload I get every thing back to normal". I think that he gets 500 error. how can I log it? I want to know when and where it happens. any ideas?
500 errors are logged in your web server's error log, for Apache that is usually error.log. You should be able to find all errors there, including the requesting IP and the exact message.
If you don't have access to the error logs, if you have Apache, you can try this in a .htaccess file:
ErrorDocument 500 /my_error_handler.php
my_error_handler.php would then send out an E-Mail to you or something. This won't give you the exact error message, though.
According to the comments, this is not the case on Apache, but is the case on IIS. If you think the error is related to your PHP code then it's possible this is what's causing the status 500 error.
There are several ini directives you can set to deal with server errors. I recommend having error logging switched on. See the following site for each ini directive:
http://www.addedbytes.com/drafts/php-ini-guide/php-ini-guide-error-handling-and-logging/
Add/Change/Uncomment the ones you want in your php.ini file.
With logging switched on, the following php code generates the following error string in the error log file:
<?php this_is_undefined(); ?>
error log -
[05-Jan-2010 12:44:29] PHP Fatal error: Call to undefined function this_is_undefined() in D:\websites\leaguers.co.uk\test.php on line 1
Related
I am having an issue when I have a php application that is returning an internal server error (500) however nothing is showing up in the error log.
Now I know there are error with what I am trying to run, I know I have missing some files and what not but something should show in the apache error log (otherwise how are I supposed to know exactly what I am missing).
I created a test script is errors it in under the same vhost configuration and those error show up fine so everything seems configured right as far as php/apache. Are there certain php errors that does show up in the error log (php is configure to display any type of notice, warning, , error, fatal error, etc...)?
This is running on ubunut 10.04 with the standard apache and php from the ubuntu repo with apt-get.
Scan your source files to find #.
From php documentation site
Currently the "#" error-control operator prefix will even disable
error reporting for critical errors that will terminate script
execution. Among other things, this means that if you use "#" to
suppress errors from a certain function and either it isn't available
or has been mistyped, the script will die right there with no
indication as to why.
Copy and paste the following into a new .htaccess file and place it on your website's root folder :
php_flag display_errors on
php_flag display_startup_errors on
Errors will be shown directly in your page.
That's the best way to debug quickly but don't use it for long time because it could be a security breach.
If you still have 500 error and no logs you can try to execute from command line:
php -f file.php
it will not work exactly like in a browser (from server) but if there is syntax error in your code, you will see error message in console.
Maybe something turns off error output. (I understand that you are trying to say that other scripts properly output their errors to the errorlog?)
You could start debugging the script by determining where it exits the script (start by adding a echo 1; exit; to the first line of the script and checking whether the browser outputs 1 and then move that line down).
In the past, I had no error logs in two cases:
The user under which Apache was running had no permissions to modify php_error_log file.
Error 500 occurred because of bad configuration of .htaccess, for example wrong rewrite module settings. In this situation errors are logged to Apache error_log file.
For Symfony projects, be sure to check files in the project'es app/logs
More details available on this post :
How to debug 500 Error in Symfony 2
Btw, other frameworks or CMS share this kind of behaviour.
Here is another reason why errors might not be visible:
I had the same issue. In my case, I had copied the source from a production environment. Hence the ENVIRONMENT variable defined in index.php was set to 'production'. This caused error_reporting to be set to 0 (no logging). Just set it to 'development' and you should start seeing error messages in apache log.
Turned out the 500 was due to a semi colon missing in database config :-)
Another case which happened to me, is I did a CURL to some of my pages, and got internal server error and nothing was in the apache logs, even when I enabled all error reporting.
My problem was that in the CURL I set
curl_setopt($CR, CURLOPT_FAILONERROR, true);
Which then didn't show me my error, though there was one, this happened because the error was on a framework level and not a PHP one, so it didn't appear in the logs.
You need to enable the PHP error log.
This is due to some random glitch in the web server when you have a php error, it throws a 500 internal error (i have the same issue).
If you look in the PHP error log, you should find your solution.
see here in the doc of how to enable it in the php.ini
Be sure your file permissions are correct. If apache doesn't have permission to read the file then it can't write to the log.
What happened for me when this was an issue, was that the site had used too much memory, so I'm guessing that it couldn't write to an error log or displayed the error. For clarity, it was a Wordpress site that did this. Upping the memory limit on the server showed the site again.
SOLVED
I struggled with this and later on, I realized that I was working on PHP 5.6, so I upgraded to PHP 7.0, then I released there were comments placed by git for conflicting codes. I found something like this in my code <<<<<<<< But solved it.
In /var/log/apache2/error.log I able to trace http 500 error, Only I able to log error when I hit url from browser but when I call api either via ajax call or by postman, then any syntax error(500 error) not logged in apache2/error.log . Please tell me how can I log this one as well. Thx! in advance.
If you're getting an error and there's nothing wrong with your Apache, then there's probably an issue with your PHP. Look in your PHP error log for an error. If PHP is not logging errors then you need to change the php.ini file so that log_errors is 1 and error_log is the file name you want errors to be logged to. (I recommend "error_log". This will log all errors to the file error_log in the same directory as the file creating the error.)
I am getting Error i tried to find but did not get why getting Error.While its working fine on my localhost but not working on live server.
http://wellnessvisit.com/vascular-new/assets/global/plugins/jquery-file-upload/server/php/
Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, webmaster#wellnessvisit.com and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
Normally production servers are configured to hide all error information.
You can add these two lines in your main php file to see if there's a way to get the error information (temporarily, be sure to delete them after you're done debugging):
error_reporting(E_ALL);
ini_set('display_errors', 'On');
You can also check if there's an error_log file in the same folder as your PHP script, many servers log the errors to a file.
If no luck, with the previous lines, it might be a syntax error so the parsing is not completed.
I am having an issue when I have a php application that is returning an internal server error (500) however nothing is showing up in the error log.
Now I know there are error with what I am trying to run, I know I have missing some files and what not but something should show in the apache error log (otherwise how are I supposed to know exactly what I am missing).
I created a test script is errors it in under the same vhost configuration and those error show up fine so everything seems configured right as far as php/apache. Are there certain php errors that does show up in the error log (php is configure to display any type of notice, warning, , error, fatal error, etc...)?
This is running on ubunut 10.04 with the standard apache and php from the ubuntu repo with apt-get.
Scan your source files to find #.
From php documentation site
Currently the "#" error-control operator prefix will even disable
error reporting for critical errors that will terminate script
execution. Among other things, this means that if you use "#" to
suppress errors from a certain function and either it isn't available
or has been mistyped, the script will die right there with no
indication as to why.
Copy and paste the following into a new .htaccess file and place it on your website's root folder :
php_flag display_errors on
php_flag display_startup_errors on
Errors will be shown directly in your page.
That's the best way to debug quickly but don't use it for long time because it could be a security breach.
If you still have 500 error and no logs you can try to execute from command line:
php -f file.php
it will not work exactly like in a browser (from server) but if there is syntax error in your code, you will see error message in console.
Maybe something turns off error output. (I understand that you are trying to say that other scripts properly output their errors to the errorlog?)
You could start debugging the script by determining where it exits the script (start by adding a echo 1; exit; to the first line of the script and checking whether the browser outputs 1 and then move that line down).
In the past, I had no error logs in two cases:
The user under which Apache was running had no permissions to modify php_error_log file.
Error 500 occurred because of bad configuration of .htaccess, for example wrong rewrite module settings. In this situation errors are logged to Apache error_log file.
For Symfony projects, be sure to check files in the project'es app/logs
More details available on this post :
How to debug 500 Error in Symfony 2
Btw, other frameworks or CMS share this kind of behaviour.
Here is another reason why errors might not be visible:
I had the same issue. In my case, I had copied the source from a production environment. Hence the ENVIRONMENT variable defined in index.php was set to 'production'. This caused error_reporting to be set to 0 (no logging). Just set it to 'development' and you should start seeing error messages in apache log.
Turned out the 500 was due to a semi colon missing in database config :-)
Another case which happened to me, is I did a CURL to some of my pages, and got internal server error and nothing was in the apache logs, even when I enabled all error reporting.
My problem was that in the CURL I set
curl_setopt($CR, CURLOPT_FAILONERROR, true);
Which then didn't show me my error, though there was one, this happened because the error was on a framework level and not a PHP one, so it didn't appear in the logs.
You need to enable the PHP error log.
This is due to some random glitch in the web server when you have a php error, it throws a 500 internal error (i have the same issue).
If you look in the PHP error log, you should find your solution.
see here in the doc of how to enable it in the php.ini
Be sure your file permissions are correct. If apache doesn't have permission to read the file then it can't write to the log.
What happened for me when this was an issue, was that the site had used too much memory, so I'm guessing that it couldn't write to an error log or displayed the error. For clarity, it was a Wordpress site that did this. Upping the memory limit on the server showed the site again.
SOLVED
I struggled with this and later on, I realized that I was working on PHP 5.6, so I upgraded to PHP 7.0, then I released there were comments placed by git for conflicting codes. I found something like this in my code <<<<<<<< But solved it.
I am getting an error
"Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, webmaster#**.com and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request."
on trying to access my site. I even tried on a different server that was working properly and yet the same result.
Kindly help me out.
Thanks in advance.
The 500 Internal Server Error status code is normally caused by a misconfiguration in the web server or a server-side app that fails to work properly or is crashing. Find the web server error log: you should find the exact details of the error right there. In Apache, logs tend to be under %ProgramFiles%\Apache Software Foundation\Apache2.2\logs (Windows) or /var/log/httpd (Linux).
The 404 Not Found status code when using the ErrorDocument directive is exactly that: you've customized your "not found" page with a file that does not exist. Find such directive in your Apache settings and fix it accordingly.
looks like you are having problem in your server configuration. If you are using apache server then it might be problem in .htaccess file check if there is any .htaccess file exists in your root folder if it is remove it and check it again
Sometimes it is a permission issue
Setting a 777 permission on a directory can cause this error