Keep concentrate It's too easy to customize and apply.
Set Custom 404 error page for your website php:
Step 1 : Open notepad type below code, you can also copy paste.
ErrorDocument 400 /error.php ErrorDocument 401 /error.php ErrorDocument 403 /error.php ErrorDocument 404 /error.php ErrorDocument 500 /error.php
$status = $_SERVER['REDIRECT_STATUS']; $codes = array( 403 => array('403 Forbidden', 'The server has refused to fulfill your request.'), 404 => array('404 Not Found', 'The document or file requested was not found.'), 405 => array('405 Method Not Allowed', 'The method specified in the Request-Line is not allowed for the specified resource.'), 408 => array('408 Request Timeout', 'Your browser failed to send a request in the time allowed by the server.'), 500 => array('500 Internal Server Error', 'The request was unsuccessful due to an unexpected condition encountered by the server.'), 502 => array('502 Bad Gateway', 'The server received an invalid response from the upstream server while trying to fulfill the request.'), 504 => array('504 Gateway Timeout', 'The upstream server failed to send a request in the time allowed by the server.') ); ?> <html>Your html error code which you want to display.</html>