blocks|key|1437889|text|if+(strstr($_SERVER['REQUEST_URI'],'index.php')){
++++header('HTTP/1.0+404+Not+Found');
++++echo+"<h1>404+Not+Found</h1>";
++++echo+"The+page+that+you+have+requested+could+not+be+found.";
++++exit();
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1437890|如果你看最后两行回声，你就会看到内容。您可以随心所欲地对其进行自定义。|unstyled|1437891|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>if (strstr($_SERVER['REQUEST_URI'],'index.php')){
    header('HTTP/1.0 404 Not Found');
    echo "&lt;h1&gt;404 Not Found&lt;/h1&gt;";
    echo "The page that you have requested could not be found.";
    exit();
}
</code></pre>

<p>If you look at the last two echo lines, that's where you'll see the content. You can customize it however you want.</p>


blocks|key|1652940|text|对于记录，这是全大小写处理程序：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1652941|<?php
header($_SERVER["SERVER_PROTOCOL"]."+404+Not+Found");
header("Status:+404+Not+Found");

$_SERVER['REDIRECT_STATUS']+=+404;
?>+|code-block|syntax|javascript|1652942|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>For the record, this is the all-case handler:</p>

<pre><code>&lt;?php
header($_SERVER["SERVER_PROTOCOL"]." 404 Not Found");
header("Status: 404 Not Found");

$_SERVER['REDIRECT_STATUS'] = 404;
?&gt; &lt;!-- 404 contents below this line --&gt;
</code></pre>


blocks|key|1652717|text|加载默认服务器404页面，如果您有一个，例如为apache定义的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1652718|if(strstr($_SERVER['REQUEST_URI'],'index.php')){
++header('HTTP/1.0+404+Not+Found');
++readfile('404missing.html');
++exit();
}|code-block|syntax|javascript|1652719|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>Load default server 404 page, if you have one, e.g. defined for apache:</p>

<pre><code>if(strstr($_SERVER['REQUEST_URI'],'index.php')){
  header('HTTP/1.0 404 Not Found');
  readfile('404missing.html');
  exit();
}
</code></pre>


blocks|key|1438549|text|从PHP5.4开始，你现在可以做http_response_code(404);|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1438550|entityMap|0|LINK|mutability|MUTABLE|url|http://www.php.net/manual/en/function.http-response-code.php^0|G|O|G|O|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]]|D|@$9|Q|A|R|1|S]]|E|$]]|$1|F|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

<p>Since php 5.4 you can now do <a href="http://www.php.net/manual/en/function.http-response-code.php"><code>http_response_code(404);</code></a></p>


blocks|key|1438333|text|另一种解决方案，基于@Kitet的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1438334|header($_SERVER["SERVER_PROTOCOL"]."+404+Not+Found");
header("Status:+404+Not+Found");

$_SERVER['REDIRECT_STATUS']+=+404;
//If+you+don't+know+which+web+page+is+in+use,+use+any+page+that+doesn't+exists
$handle+=+curl_init('http://'.+$_SERVER["HTTP_HOST"]+.'/404missing.html');
curl_exec($handle);|code-block|syntax|javascript|1438335|如果您正在编写一个托管在您无法控制的服务器上的网站，您将不知道哪个文件是"404missing.html“。但是，您仍然可以这样做。|1438336|通过这种方式，您可以在同一服务器上提供与普通404页面完全相同的结果。观察者将不能区分现有的PHP页面返回404和不存在的页面。|1438337|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

<p>Another solution, based on @Kitet's.</p>

<pre><code>header($_SERVER["SERVER_PROTOCOL"]." 404 Not Found");
header("Status: 404 Not Found");

$_SERVER['REDIRECT_STATUS'] = 404;
//If you don't know which web page is in use, use any page that doesn't exists
$handle = curl_init('http://'. $_SERVER["HTTP_HOST"] .'/404missing.html');
curl_exec($handle);
</code></pre>

<p>If you are programming a website that hosted in a server you do not have control, you will not know which file is the "404missing.html". However you can still do this.</p>

<p>In this way, you provided exactly the same outcome of a normal 404 page on the same server. An observer will not be able to distinguish between an existing PHP page returns 404 and a non-existing page.</p>


blocks|key|1653141|text|尝试使用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1653142|header("Status:+404+Not+Found");
header('HTTP/1.0+404+Not+Found');|code-block|syntax|javascript|1653143|再见!|1653144|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

<p>try with:</p>

<pre><code>header("Status: 404 Not Found");
header('HTTP/1.0 404 Not Found');
</code></pre>

<p>Bye!</p>


blocks|key|1437967|text|稍微短一点的版本。抑制奇怪的回声。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1437968|if+(strstr($_SERVER['REQUEST_URI'],'index.php')){
++header('HTTP/1.0+404+Not+Found');
++exit("<h1>404+Not+Found</h1>\nThe+page+that+you+have+requested+could+not+be+found.");
}|code-block|syntax|javascript|1437969|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>A little bit shorter version. Suppress odd echo.</p>

<pre><code>if (strstr($_SERVER['REQUEST_URI'],'index.php')){
  header('HTTP/1.0 404 Not Found');
  exit("&lt;h1&gt;404 Not Found&lt;/h1&gt;\nThe page that you have requested could not be found.");
}
</code></pre>


blocks|key|1652795|text|if($_SERVER['PHP_SELF']+==+'/index.php'){+
+++header('HTTP/1.0+404+Not+Found');
+++echo+"<h1>404+Not+Found</h1>";
+++echo+"The+page+that+you+have+requested+could+not+be+found.";
+++die;
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1652796|不要简化echo语句，也不要忘记上面的分号，还有为什么要在页面上运行子字符串，我们可以很容易地运行php_self|unstyled|1652797|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>if($_SERVER['PHP_SELF'] == '/index.php'){ 
   header('HTTP/1.0 404 Not Found');
   echo "&lt;h1&gt;404 Not Found&lt;/h1&gt;";
   echo "The page that you have requested could not be found.";
   die;
}
</code></pre>

<p>never simplify the echo statements, and never forget the semi colon like above, also why run a substr on the page, we can easily just run php_self</p>


blocks|key|1437950|text|如果您希望显示服务器的默认错误页面，则必须在服务器中处理此问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1437951|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

<p>If you want the server’s default error page to be displayed, you have to handle this in the server.</p>


blocks|key|1438416|text|您做得很对，尽管它可能需要一些改进。看起来这个问题已经解决了，所以让我们来讨论一下实际应用的好处：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1438417|我们的一个老网站有大量的多语言技术文档，它是在一个if+else条件中执行的：|1438418|++++if+(<no+file+found>){
++++++++die("NO+FILE+HERE");
++++}|code-block|syntax|javascript|1438419|问题(除了没有帮助的消息和糟糕的用户体验)是我们通常使用链接爬虫(在我们的例子中是完整性)来检查坏链接和丢失的文档。这意味着我们得到了一个完全正确的200无错误响应，告诉我们那里有一个文件。Integrity不知道我们需要的是一个PDF，所以我们不得不用php手动添加一个404头文件。通过在骰子上添加代码(因为之后不会执行任何东西，而且无论如何，头文件都应该在任何呈现的html之前)，完整性(其行为或多或少类似于浏览器)将返回404，并且我们将确切地知道在哪里查找丢失的文件。有更优雅的方式告诉用户有错误，但通过提供404错误，您不仅可以通知浏览器和类似浏览器的程序该错误，而且(我相信-如果我错了，请纠正我)还会将这些错误记录在您的服务器日志中，在那里您可以轻松地grep+404。|1438420|++++header('HTTP/1.0+404+Not+Found');
++++die("NO+FILE+HERE");|1438421|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

<p>You're doing it right though it could use some refining. Looks like that's been addressed so let's talk practical application benefits:</p>

<p>An old website of ours that has a large collection of multilingual tech docs was executing this inside an if else conditional:</p>

<pre><code>    if (&lt;no file found&gt;){
        die("NO FILE HERE");
    }
</code></pre>

<p>The problem (besides the unhelpful message and bad user experience) being that we generally use a link crawler (in our case integrity) to check out bad links and missing documents. This means that we were getting a perfectly correct 200 no error response telling us that there was a file there. Integrity didn't know that we were expecting a PDF so we had to manually add a 404 header with php. By adding your code above the die (because nothing afterwards would execute and header should always be before any rendered html anyway), integrity (which behaves more or less like a browser) would return a 404 and we would know exactly where to look for missing files. There are more elegant ways of telling the user that there is an error, but by serving a 404 error you are not only notifying browsers and browser-like programs of the error but (I believe-correct me if I'm wrong) are also recording those errors in your server logs where you can easily grep for 404s.</p>

<pre><code>    header('HTTP/1.0 404 Not Found');
    die("NO FILE HERE");
</code></pre>


blocks|key|1653179|text|试试这个：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1653180|if+(strstr($_SERVER['REQUEST_URI'],'index.php'))+{
++++header('HTTP/1.0+404+Not+Found');
++++echo+"<head><title>404+Not+Found</title></head>";
++++echo+"<h1>Not+Found</h1>";
++++$uri+++=+rtrim(dirname($_SERVER['PHP_SELF']),+'/\\');
++++echo+"<p>The+requested+URL+".$uri."+was+not+found+on+this+server.</p>";
++++exit();
}|code-block|syntax|javascript|1653181|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>Try this:</p>

<pre><code>if (strstr($_SERVER['REQUEST_URI'],'index.php')) {
    header('HTTP/1.0 404 Not Found');
    echo "&lt;head&gt;&lt;title&gt;404 Not Found&lt;/title&gt;&lt;/head&gt;";
    echo "&lt;h1&gt;Not Found&lt;/h1&gt;";
    $uri   = rtrim(dirname($_SERVER['PHP_SELF']), '/\\');
    echo "&lt;p&gt;The requested URL ".$uri." was not found on this server.&lt;/p&gt;";
    exit();
}
</code></pre>


blocks|key|1438509|text|你知道，在我的网站上，我创建了这样的东西：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1438510|++++++++$uri=$_SERVER['REQUEST_URI'];
++++++++$strpos=strpos($uri,+'.php');
++++++++if+($strpos!==false){
++++++++$e404="The+page+requested+by+you:+&quot".$_SERVER['REQUEST_URI']."&quot,+doesn't+exists+on+this+server.";
++++++++$maybe=str_replace('.php','',$uri);
++++++++$maybe=str_replace('/','',$maybe);
++++++++die("<center><h1>404</h1><hr><h3>$e404</h3><h3>Maybe+try+<a+href=$maybe>www.leaveyortexthere.p.ht/$maybe</a>?</center>");

}|code-block|syntax|javascript|1438511|我希望它能对你有所帮助。|1438512|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

<p>You know, in my website i created something like this:</p>

<pre><code>        $uri=$_SERVER['REQUEST_URI'];
        $strpos=strpos($uri, '.php');
        if ($strpos!==false){
        $e404="The page requested by you: &amp;quot".$_SERVER['REQUEST_URI']."&amp;quot, doesn't exists on this server.";
        $maybe=str_replace('.php','',$uri);
        $maybe=str_replace('/','',$maybe);
        die("&lt;center&gt;&lt;h1&gt;404&lt;/h1&gt;&lt;hr&gt;&lt;h3&gt;$e404&lt;/h3&gt;&lt;h3&gt;Maybe try &lt;a href=$maybe&gt;www.leaveyortexthere.p.ht/$maybe&lt;/a&gt;?&lt;/center&gt;");

}
</code></pre>

<p>i hope it helps you.</p>


blocks|key|1652689|text|我想到了这个问题..我认为重定向到服务器上不存在的链接可能会起到作用！因为服务器会返回他的404：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1652690|header('Redirect+abbb.404.nonexist');+<这肯定不存在|offset|length|style|CODE|1652691|entityMap^0|0|0|11|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@$D|L|E|M|F|G]]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

<p>I came up to this problem.. I think that redirecting to a non existing link on your server might do the trick ! Because the server would return his 404:<br />
<code>header('Redirect abbb.404.nonexist');</code> &lt; that doesnt exist for sure</p>


blocks|key|1438173|text|如果您想要显示服务器的默认404页面，您可以将其加载到如下所示的框架中：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1438174|echo+'<iframe+src="/something-bogus"+width="100%25"+height="100%25"+frameBorder="0"+border="0"+scrolling="no"></iframe>';|code-block|syntax|javascript|1438175|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>If you want to show the server’s default 404 page, you can load it in a frame like this:<br></p>

<pre><code>echo '&lt;iframe src="/something-bogus" width="100%" height="100%" frameBorder="0" border="0" scrolling="no"&gt;&lt;/iframe&gt;';
</code></pre>


<pre><code>if (strstr($_SERVER['REQUEST_URI'],'index.php')) {
    header('HTTP/1.0 404 Not Found');
}
</code></pre>

<p>Why wont this work? I get a blank page.</p>


Why won't my PHP app send a 404 error?

服务器

if (strstr($_SERVER['REQUEST_URI'],'index.php')) {    header('HTTP/1.0 404 Not Found');}为什么这个不起作用？我得到了一张空白页。

问为什么我的PHP应用程序不会发送404错误？
EN

回答 14

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问为什么我的PHP应用程序不会发送404错误？EN

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问为什么我的PHP应用程序不会发送404错误？
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