My file .htaccess handles all requests from /word_here to my internal endpoint /page.php?name=word_here. The PHP script then checks if the requested page is in its array of pages.
If not, how can I simulate an error 404?
I tried this, but it didn’t result in my 404 page configured via ErrorDocument in the .htaccess showing up.
header($_SERVER["SERVER_PROTOCOL"]." 404 Not Found");
Am I right in thinking that it’s wrong to redirect to my error 404 page?
asked Sep 4, 2009 at 19:29
2
The up-to-date answer (as of PHP 5.4 or newer) for generating 404 pages is to use http_response_code:
<?php
http_response_code(404);
include('my_404.php'); // provide your own HTML for the error page
die();
die() is not strictly necessary, but it makes sure that you don’t continue the normal execution.
answered Jan 11, 2017 at 14:28
bladeblade
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2
What you’re doing will work, and the browser will receive a 404 code. What it won’t do is display the «not found» page that you might be expecting, e.g.:
Not Found
The requested URL /test.php was not found on this server.
That’s because the web server doesn’t send that page when PHP returns a 404 code (at least Apache doesn’t). PHP is responsible for sending all its own output. So if you want a similar page, you’ll have to send the HTML yourself, e.g.:
<?php
header($_SERVER["SERVER_PROTOCOL"]." 404 Not Found", true, 404);
include("notFound.php");
?>
You could configure Apache to use the same page for its own 404 messages, by putting this in httpd.conf:
ErrorDocument 404 /notFound.php
Kzqai
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answered Sep 4, 2009 at 19:50
JW.JW.
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3
Try this:
<?php
header("HTTP/1.0 404 Not Found");
?>
answered Sep 4, 2009 at 19:36
Ates GoralAtes Goral
137k26 gold badges137 silver badges190 bronze badges
2
Create custom error pages through .htaccess file
1. 404 — page not found
RewriteEngine On
ErrorDocument 404 /404.html
2. 500 — Internal Server Error
RewriteEngine On
ErrorDocument 500 /500.html
3. 403 — Forbidden
RewriteEngine On
ErrorDocument 403 /403.html
4. 400 — Bad request
RewriteEngine On
ErrorDocument 400 /400.html
5. 401 — Authorization Required
RewriteEngine On
ErrorDocument 401 /401.html
You can also redirect all error to single page. like
RewriteEngine On
ErrorDocument 404 /404.html
ErrorDocument 500 /404.html
ErrorDocument 403 /404.html
ErrorDocument 400 /404.html
ErrorDocument 401 /401.html
answered Mar 30, 2016 at 10:34
Irshad KhanIrshad Khan
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1
Did you remember to die() after sending the header? The 404 header doesn’t automatically stop processing, so it may appear not to have done anything if there is further processing happening.
It’s not good to REDIRECT to your 404 page, but you can INCLUDE the content from it with no problem. That way, you have a page that properly sends a 404 status from the correct URL, but it also has your «what are you looking for?» page for the human reader.
answered Sep 4, 2009 at 19:50
EliEli
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Standard Apache 404 error looks like this:
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>404 Not Found</title>
</head><body>
<h1>Not Found</h1>
<p>The requested URL was not found on this server.</p>
</body></html> Thus, you can use the following PHP code to generate 404 page that looks exactly as standard apache 404 page:
function httpNotFound()
{
http_response_code(404);
header('Content-type: text/html');
// Generate standard apache 404 error page
echo <<<HTML
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>404 Not Found</title>
</head><body>
<h1>Not Found</h1>
<p>The requested URL was not found on this server.</p>
</body></html>
HTML;
exit;
}
answered Mar 20 at 16:14
Dima L.Dima L.
3,39332 silver badges30 bronze badges
try putting
ErrorDocument 404 /(root directory)/(error file)
in .htaccess file.
Do this for any error but substitute 404 for your error.
StackedQ
3,9891 gold badge27 silver badges41 bronze badges
answered May 20, 2018 at 19:41
In the Drupal or WordPress CMS (and likely others), if you are trying to make some custom php code appear not to exist (unless some condition is met), the following works well by making the CMS’s 404 handler take over:
<?php
if(condition){
do stuff;
} else {
include('index.php');
}
?>
answered Jan 28, 2019 at 19:38
Mike GodinMike Godin
3,6763 gold badges27 silver badges29 bronze badges
Immediately after that line try closing the response using exit or die()
header($_SERVER["SERVER_PROTOCOL"]." 404 Not Found");
exit;
or
header($_SERVER["SERVER_PROTOCOL"]." 404 Not Found");
die();
answered May 25, 2018 at 4:22
4
try this once.
$wp_query->set_404();
status_header(404);
get_template_part('404');
answered Mar 31, 2020 at 4:24
1
My file .htaccess handles all requests from /word_here to my internal endpoint /page.php?name=word_here. The PHP script then checks if the requested page is in its array of pages.
If not, how can I simulate an error 404?
I tried this, but it didn’t result in my 404 page configured via ErrorDocument in the .htaccess showing up.
header($_SERVER["SERVER_PROTOCOL"]." 404 Not Found");
Am I right in thinking that it’s wrong to redirect to my error 404 page?
asked Sep 4, 2009 at 19:29
2
The up-to-date answer (as of PHP 5.4 or newer) for generating 404 pages is to use http_response_code:
<?php
http_response_code(404);
include('my_404.php'); // provide your own HTML for the error page
die();
die() is not strictly necessary, but it makes sure that you don’t continue the normal execution.
answered Jan 11, 2017 at 14:28
bladeblade
11.9k7 gold badges36 silver badges38 bronze badges
2
What you’re doing will work, and the browser will receive a 404 code. What it won’t do is display the «not found» page that you might be expecting, e.g.:
Not Found
The requested URL /test.php was not found on this server.
That’s because the web server doesn’t send that page when PHP returns a 404 code (at least Apache doesn’t). PHP is responsible for sending all its own output. So if you want a similar page, you’ll have to send the HTML yourself, e.g.:
<?php
header($_SERVER["SERVER_PROTOCOL"]." 404 Not Found", true, 404);
include("notFound.php");
?>
You could configure Apache to use the same page for its own 404 messages, by putting this in httpd.conf:
ErrorDocument 404 /notFound.php
Kzqai
22.6k25 gold badges105 silver badges135 bronze badges
answered Sep 4, 2009 at 19:50
JW.JW.
50.5k36 gold badges114 silver badges142 bronze badges
3
Try this:
<?php
header("HTTP/1.0 404 Not Found");
?>
answered Sep 4, 2009 at 19:36
Ates GoralAtes Goral
137k26 gold badges137 silver badges190 bronze badges
2
Create custom error pages through .htaccess file
1. 404 — page not found
RewriteEngine On
ErrorDocument 404 /404.html
2. 500 — Internal Server Error
RewriteEngine On
ErrorDocument 500 /500.html
3. 403 — Forbidden
RewriteEngine On
ErrorDocument 403 /403.html
4. 400 — Bad request
RewriteEngine On
ErrorDocument 400 /400.html
5. 401 — Authorization Required
RewriteEngine On
ErrorDocument 401 /401.html
You can also redirect all error to single page. like
RewriteEngine On
ErrorDocument 404 /404.html
ErrorDocument 500 /404.html
ErrorDocument 403 /404.html
ErrorDocument 400 /404.html
ErrorDocument 401 /401.html
answered Mar 30, 2016 at 10:34
Irshad KhanIrshad Khan
5,6302 gold badges43 silver badges39 bronze badges
1
Did you remember to die() after sending the header? The 404 header doesn’t automatically stop processing, so it may appear not to have done anything if there is further processing happening.
It’s not good to REDIRECT to your 404 page, but you can INCLUDE the content from it with no problem. That way, you have a page that properly sends a 404 status from the correct URL, but it also has your «what are you looking for?» page for the human reader.
answered Sep 4, 2009 at 19:50
EliEli
97.2k20 gold badges76 silver badges81 bronze badges
Standard Apache 404 error looks like this:
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>404 Not Found</title>
</head><body>
<h1>Not Found</h1>
<p>The requested URL was not found on this server.</p>
</body></html> Thus, you can use the following PHP code to generate 404 page that looks exactly as standard apache 404 page:
function httpNotFound()
{
http_response_code(404);
header('Content-type: text/html');
// Generate standard apache 404 error page
echo <<<HTML
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>404 Not Found</title>
</head><body>
<h1>Not Found</h1>
<p>The requested URL was not found on this server.</p>
</body></html>
HTML;
exit;
}
answered Mar 20 at 16:14
Dima L.Dima L.
3,39332 silver badges30 bronze badges
try putting
ErrorDocument 404 /(root directory)/(error file)
in .htaccess file.
Do this for any error but substitute 404 for your error.
StackedQ
3,9891 gold badge27 silver badges41 bronze badges
answered May 20, 2018 at 19:41
In the Drupal or WordPress CMS (and likely others), if you are trying to make some custom php code appear not to exist (unless some condition is met), the following works well by making the CMS’s 404 handler take over:
<?php
if(condition){
do stuff;
} else {
include('index.php');
}
?>
answered Jan 28, 2019 at 19:38
Mike GodinMike Godin
3,6763 gold badges27 silver badges29 bronze badges
Immediately after that line try closing the response using exit or die()
header($_SERVER["SERVER_PROTOCOL"]." 404 Not Found");
exit;
or
header($_SERVER["SERVER_PROTOCOL"]." 404 Not Found");
die();
answered May 25, 2018 at 4:22
4
try this once.
$wp_query->set_404();
status_header(404);
get_template_part('404');
answered Mar 31, 2020 at 4:24
1
header("HTTP/1.0 404 Not Found");
header("HTTP/1.1 404 Not Found");
header("Status: 404 Not Found");— не работает
-
Вопрос заданболее трёх лет назад
-
13044 просмотра
В помощь Вам http-response-code(404) клац
писать до любого вывода
Пригласить эксперта
Ставьте error_reporting(-1); в начале кода и смотрите что не так.
Скорее всего перед header() был вывод данных.
А может вы что-то не так поняли? Ваш код всего-лишь объявляет, что данная страница — страница ошибки. Чтобы именно вызвать 404 попробуйте exit(header('Location: /error404/'));
Попробуйте добавить exit(); сразу после вызова header();
Так-же перед вызовом header(); у Вас не должно быть вывода информации, если первый вариант не помог, попробуйте убрать закрывающий PHP тег ?> (если он есть)
На самом деле Вы всего лишь отправили заголовок, чтобы показать страницу нужно взять include или заголовок location.
-
Показать ещё
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Минуточку внимания
Я решил перенести большую часть файлов со старого сайта на новый. И у меня возник вопрос — «А не обвинит ли меня Yandex в использовании неуникальных статей?», т.к. у меня одни и те же материалы будут на разных страницах.
Я написал письмо в службу поддержки yandex, и мне пришло письмо, в котором сообщалось, что переживать не надо. Единственно, настоятельно желательно, чтобы я каким-то способом закрыл старые странички от индексирования (через robots.txt, вызов ошибки 404 или перенаправление) и удалил странички из базы по адресу http://webmaster.yandex.ru/delurl.xml. Удалять по указанному адресу желательно, чтобы быстрее прекратилась индексация страниц.
По некоторым причинам я предпочел способ вызова ошибки 404. Ошибка 404 вызывается в том случае, если ресурс на который идет ссылка не обнаружен. И тут я обнаружил, что у меня то и нет вызова этой ошибки, т.е. какие бы данные пользователь не ввел бы на старом сайте, что-то все равно выводится. Такая ситуация на мой взгляд не допустима, и я пошел с ней бороться.
Мой сайт написан был на php, поэтому я очень быстро нашел команду для вызова ошибки 404. Она имеет вид:
header("HTTP/1.0 404 Not Found");
exit;
Казалось бы все просто, но нет же. Никак эти две команды не хотели работать. Тогда я почитал дополнительно материал и выяснил, что header() должна вызываться до отправки любого другого вывода. Т.е. она должна быть исключительно самой первой при выводе, поэтому ее нельзя использовать внутри require_once().
Но как оказалось существуют три замечательные функции, которые позволяют решить эту проблему:
-
ob_start() — задает начало области, которую надо поместить в буфер, я поместил ее самой первой при выводе.
- ob_end_flush() — окончание задания буфер и сразу вывод. Т.е. первые две функции задают область, которую сначала нужно вывести в буфер, а потом сразу вывести.
- ob_end_clean() — очищает буфер, и следующая команда как бы выводится самой первой.
С использованием этих команд организация вызова ошибки 404 выглядит следующим образом:
- Самая первая команда — ob_start()
- Далее идет основное содержание, которое пока копируется в буфер.
- Проверка на предмет вызова ошибки 404. Например, проверка наличия определенного значения. Если после проверки имеются причины вызвать ошибку, то задается код:
ob_end_clean() ; header("HTTP/1.0 404 Not Found"); exit;Тем самым будет выдано сообщение об ошибке и осуществлен выход.
- Выводим содержимое буфера командой ob_end_flush(). Идея в том, что если была вызвана ошибка, то сюда не попадем. Если ошибки не было, то выводим буфер.
Далее в файле .htaccess можно указать файл, который будет сопоставляться ошибке 404, но это уже совершенно другая история…
Introduction: Custom 404 Error Page in PHP
Every website gets the occasional, frustrating Error 404: Not Found. And if you have your own website, you may wish to customize these error pages. Thankfully, it’s not that hard to do. Your error pages may be of any extension you want. Usually, they are written in SHTML. But SHTML isn’t very dynamic in terms of what can be done with it. So I went over to PHP for my error pages. The coding wasn’t hard either. So let’s begin.
Step 1: Requirements
If you have a website, your hosing server should have PHP installed. If not, ask your server’s admin if they would be kind enough to install it. If you are just screwing around wasting time, you need some type of emulator. If you’re on Windows, use easyPHP for this. If you’re on Linux and can spare the resources, get: apache2 and php (for Ubuntu, sudo apt-get install apache2 php). If you’re on mac, I have no idea what you can use.
Once you meet these requirements, go to the next step.
Step 2: .htaccess
As stated on the cover page, your custom error page(s) can have any extension you want. But you can’t use it if your server isn’t told to use it. This is where .htaccess comes in. .htaccess is a file named, well, «.htaccess». This file can be used to configure your site to certain degrees. What we will do is go ahead and point the 404 error to 404.php (which, ironically, doesn’t exist yet). This will be a hidden file (every file that begins with a dot is a hidden file). So make sure you can view hidden files. In this file, write the following code and save it:
ErrorDocument 404 /404.php
And while you’re at it, if you feel like it:
ErrorDocument 400 /400.php
ErrorDocument 401 /401.php
ErrorDocument 403 /403.php
ErrorDocument 404 /404.php #Don't re-add this line
ErrorDocument 500 /500.php
Step 3: 404.php
And the actual error page. I’m going to ignore the whole «let’s follow standards» thing I usually do. The reason I chose PHP for the error page is because you can figure out the source of the error to an extent; you can see if the missing page was typed in the address bar, if it was a link on your site, or if it was a link on a different site. This is achieved by parsing a server variable. You can also parse a couple other server variables and see exactly what was put into the address bar. For this ible, we will only grab the requested page and the referrer, if any.
<?php echo $_SERVER['REQUEST_URI']; ?> does not exist, sorry.
The line above will tell the visitor that the page they want, along with the page’s path (preceded with a slash), does not exist. It’s helpful to tell the specific page because the hyperlink they followed, if they followed, may not reflect the page’s path. The next code will grab if there was a referrer and who it was.
<?php
if(isset($_SERVER['HTTP_REFERER']) && !empty($_SERVER['HTTP_REFERER'])){
$refuri = parse_url($_SERVER['HTTP_REFERER']); // use the parse_url() function to create an array containing information about the domain if($refuri['host'] == "your-domain.com"){
//the link was on your site
}
else{ //the link was on another site. $refuri['host'] will return what that site is
} } else{
//the visitor typed gibberish into the address bar
}
?>
On my site, I told the user one of three things to do as per the code. If the referrer was my site, email me and let me know. If the referrer was on a different site, email them and let them know. If they types randomly in the address bar, stop doing that.
<?php
if(isset($_SERVER['HTTP_REFERER']) && !empty($_SERVER['HTTP_REFERER'])){
$refuri = parse_url($_SERVER['HTTP_REFERER']); // use the parse_url() function to create an array containing information about the domain
if($refuri['host'] == "cutlery-in-the-toaster.com"){
echo "You should email fork@cutlery-in-the-toaster.com and tell me I have a dead link on this site.";
}
else{
echo "You should email someone over at " . $refuri['host'] . " and let them know they have a dead link to this site.";
}
}
else{
echo "If you got here from Angola, you took a wrong turn at Catumbela. And if you got here by typing randomly in the address bar, stop doing that. You're filling my error logs with unnecessary junk.";
}
?>
Step 4: Testing
First, go to your site like normal. It should show up normally. To test if your .htaccess is being read, insert random junk anywhere inside it and save it. Reloading the page should give a 500 error. If not, make sure your site is set up to use .htaccess files (I just had to edit my server’s config files to get it to work). If it still don’t work, try deleting all the blank spaces and reinserting them.
Else, undo the junk and re-save it. Now try to visit a non-existent page. You should see your 404 page. Add a few dead links on your site and try to follow them. You should end up with the same 404 page but with different content. Add a dead link to another website and the 404 page will have different content.
Step 5: Files
Here are the files used in this ible. Edit as desired/required.