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POWhy does display_errors change the HTTP status code?
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copied!<p>As pointed out in many other questions, turning display_errors to Off in php.ini makes the web server answer with status code 500 Internal server error instead of 200 OK when encountering a fatal error. I set up a simple test with an undefined function to explain the behaviour:</p> <p>php.ini</p> <pre><code>display_errors = On </code></pre> <p>index.php</p> <pre><code><?php test(); </code></pre> <p>Gives:</p> <pre><code>Fatal error: Call to undefined function test() in D:\xampp\htdocs\index.php on line 1 </code></pre> <p>or just a blank page if i silence the function call like this:</p> <pre><code><?php @test(); </code></pre> <p>In both cases answer headers are as following:</p> <pre><code>HTTP/1.1 200 OK Date: Tue, 10 Jul 2012 20:08:22 GMT Server: Apache/2.2.21 (Win32) mod_ssl/2.2.21 OpenSSL/1.0.0e PHP/5.3.8 mod_perl/2.0.4 Perl/v5.10.1 X-Powered-By: PHP/5.3.8 Content-Length: 0 Keep-Alive: timeout=5, max=100 Connection: Keep-Alive Content-Type: text/html </code></pre> <p>While changing php.ini to:</p> <pre><code>display_errors = Off </code></pre> <p>Causes:</p> <pre><code>HTTP/1.0 500 Internal Server Error Date: Tue, 10 Jul 2012 20:10:35 GMT Server: Apache/2.2.21 (Win32) mod_ssl/2.2.21 OpenSSL/1.0.0e PHP/5.3.8 mod_perl/2.0.4 Perl/v5.10.1 X-Powered-By: PHP/5.3.8 Content-Length: 0 Connection: close Content-Type: text/html </code></pre> <p>Can anybody explain me the underlaying mechanism that makes the web server answer with 500 when display_errors is Off?</p>

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