What is MIME type "application/x-httpd-php"?

A MIME type is a string that tells browsers and other tools how to handle a particular kind of file.

application/x-httpd-php tells a web server to process a file as PHP code rather than serving it as plain text. The server sends the file to the PHP interpreter, which executes any embedded code and returns only the output (often HTML) to the browser.

Server-Side Processing: The MIME type triggers the PHP interpreter to run scripts.
Dynamic Content Generation: Scripts generate custom or dynamic page content.
Security: The raw code stays hidden while only the execution results are delivered.
Configuration Integration: It is often set in server or .htaccess files to handle PHP-based pages.

Files that use this MIME type include those with extensions such as PHP, INC, CTP, PHTML, AW, PHPS, FCGI, HH, PHP3, PHPT, PHP5, PHP4, HACK, and HHI.

Learn more about how MIME types control server behavior at the MDN Web Docs or the PHP official site.

Associated file extensions

.php, .inc, .ctp, .phtml, .aw, .phps, .fcgi, .hh, .php3, .phpt, .php5, .php4, .hack, .hhi

Usage Examples

HTTP Header

When serving content with this MIME type, set the Content-Type header:


    Content-Type: application/x-httpd-php

HTML

In HTML, you can specify the MIME type in various elements:


    <a href="file.dat" type="application/x-httpd-php">Download file</a>

Server-side (Node.js)

Setting the Content-Type header in Node.js:


    const http = require('http');
    
    http.createServer((req, res) => {
      res.setHeader('Content-Type', 'application/x-httpd-php');
      res.end('Content here');
    }).listen(3000);

Associated file extensions

.php, .inc, .ctp, .phtml, .aw, .phps, .fcgi, .hh, .php3, .phpt, .php5, .php4, .hack, .hhi

FAQ

What is a MIME type?

A MIME (Multipurpose Internet Mail Extensions) type is a standard that indicates the nature and format of a document, file, or assortment of bytes. MIME types are defined and standardized in IETF's RFC 6838.

MIME types are important because they help browsers and servers understand how to process a file. When a browser receives a file from a server, it uses the MIME type to determine how to display or handle the content, whether it's an image to display, a PDF to open in a viewer, or a video to play.

MIME types consist of a type and a subtype, separated by a slash (e.g., text/html, image/jpeg, application/pdf). Some MIME types also include optional parameters.

How do I find the MIME type for a file?

You can check the file extension or use a file identification tool such as file --mime-type on the command line. Many programming languages also provide libraries to detect MIME types.

Why are multiple MIME types listed for one extension?

Different applications and historical conventions may use alternative MIME identifiers for the same kind of file. Showing them all helps ensure compatibility across systems.