How do I setup custom error pages using .htaccess?
This article covers the use of a .htaccess file to change Apache's settings directly to display a custom error page.
One big advantage of using .htaccess files to manage errors is that you can redirect them to a script, instead of just providing static pages. For example, our .htaccess file redirects errors to a PHP script which then sends our Support Team an e-mail, informing them of the problem. Using this we can find missing pages, bad links, and general problems with our web site very quickly.
Setting this up is quite easy. However, you must first have the page(s) or script available otherwise you will get the error (e.g. 403 error) and a 404 error as well, as it couldn't find the page you told it to display.
For each error you want to redirect, add the following directive to a .htaccess file:
ErrorDocument 000 /path/to/file-where 000 is the error number (e.g. 400, 404 or 500) and /path/to/file is the location of the error document on the web site (not on the hard-drive). For example, if you have created an error page at http://example.com/error/404.html, then just use the path after the domain (example.com): /error/404.html, i.e.
ErrorDocument 404 /error/404.html
You can also point it to a script with options, e.g.
ErrorDocument 404 /error.php?err=404
Finally, you will need to do this for each error you want to report. Any errors not covered by this method will fall back either to the Custom Error Documents options (if set, and option available) or to the default reporting method in Apache itself. For example, the following file will cover most errors:
ErrorDocument 400 /error/bad-request.html
ErrorDocument 401 /error/unauthorised.html
ErrorDocument 403 /error/forbidden.html
ErrorDocument 404 /error/file-not-found.html
ErrorDocument 500 /error/internal-server-error.html
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