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To increase WordPress’s maximum upload size, raise PHP’s upload_max_filesize and set post_max_size higher than it, then raise any web-server request limit that is smaller. WordPress has no general dashboard control for changing the server limit. Start by checking the values WordPress is actually receiving, change the configuration used by the website (not merely the command-line PHP configuration), and verify the result in Site Health.
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Check the effective limit before changing anything
WordPress reports the limits supplied by the PHP process serving your site. In the dashboard, open Tools > Site Health > Info, expand Media handling, and record the values shown there. The screen is read-only: it diagnoses configuration but does not alter it. See the WordPress Site Health documentation.
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| Site Health field | What it represents | How it affects an upload |
|---|---|---|
| Max size of post data allowed | PHP post_max_size |
The maximum size of the complete HTTP POST request, including the file and multipart form data. |
| Max size of an uploaded file | PHP upload_max_filesize |
The largest individual file PHP will accept. |
| Max effective file size | The smaller of the two PHP values | This is the practical per-file limit WordPress can offer. |
| Max number of files allowed | PHP max_file_uploads |
The number of files permitted in one request, independent of their sizes. |
You can also open Media > Add New. WordPress displays Maximum upload file size on that screen. It derives that value from the PHP settings available to WordPress, as described in the Media Add New documentation and the wp_max_upload_size() reference.
If Site Health and Media > Add New show a value lower than the one you expected, the web request is using a different PHP configuration from the one you edited, or another limit is constraining the result.
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Understand the limits that must agree
For a single large file, PHP evaluates both of these directives:
upload_max_filesize = 64M
post_max_size = 80Mupload_max_filesize applies to one file. post_max_size applies to the entire request, so it must leave room for multipart boundaries and any other submitted fields. PHP requires post_max_size to be larger than upload_max_filesize; WordPress calculates its effective upload size using the smaller value. The PHP core configuration manual, WordPress PHP optimization guidance, and wp_max_upload_size() reference document this relationship.
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|---|---|---|
upload_max_filesize = 64Mpost_max_size = 80M |
64 MB per file | The file directive is the smaller value. |
upload_max_filesize = 80Mpost_max_size = 64M |
Not a reliable 80 MB upload limit | The POST ceiling is smaller, and PHP expects it to exceed the file ceiling. |
upload_max_filesize = 128Mpost_max_size = 128M |
Less than 128 MB in practice | There is no overhead allowance, and the values are not in the required order. |
Choose a target that includes headroom. For a file target of 64 MB, the 64M/80M pair is a practical starting point; it does not guarantee that every 64 MB file will pass if a proxy, web server, timeout, disk, or security policy imposes another ceiling.
Change PHP’s configuration in the environment serving WordPress
The correct method depends on whether the site uses a self-managed server, PHP-FPM, CGI/FastCGI, an Apache PHP module, or a hosting control panel. Make the change in the PHP configuration read by the web server. A value shown by a command-line php -i command may belong to a different PHP installation or version and may have no effect on browser uploads.
Option 1: Edit the active php.ini
On a self-managed server, add or edit the directives in the active php.ini:
upload_max_filesize = 64M
post_max_size = 80MThe active file may be a system configuration, a PHP-FPM pool configuration, or a provider-managed file. If PHP-FPM or the web server keeps a long-running process, reload or restart the applicable service after saving the change. The exact service command varies by operating system and hosting stack, so use the service manager or hosting documentation for that server rather than assuming a command.
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On managed hosting, the provider may intentionally prevent direct edits. Look for a PHP settings or “MultiPHP” style panel, or ask support to raise both directives for the site’s web PHP version. Request the values explicitly and then confirm them in WordPress; a panel change is not complete until the web-facing PHP process has picked it up.
Option 2: Use .user.ini with CGI or FastCGI
For PHP running through CGI or FastCGI, create or edit a file named .user.ini in the site’s document root:
upload_max_filesize = 64M
post_max_size = 80MPHP reads per-directory .user.ini files only under CGI/FastCGI. The default cache interval, user_ini.cache_ttl, is 300 seconds, so a valid change can take up to five minutes to appear. The PHP per-directory configuration documentation explains the filename, execution modes, and cache behavior.
Use the document root for the WordPress installation, ensure the file is readable by the PHP process, and wait for the cache interval before judging the result. If your host uses a different document root for the public site, place the file there rather than in an unrelated account directory.
Option 3: Use Apache .htaccess only when the PHP mode supports it
On Apache running PHP as an Apache module, the equivalent directives are:
php_value upload_max_filesize 64M
php_value post_max_size 80MPut them in the applicable site-level .htaccess, normally in the document root, and back up the file first. This syntax is not universal. Apache installations using CGI or FastCGI generally require php.ini, .user.ini, a hosting panel, or provider assistance instead. Adding php_value where it is unsupported can produce an HTTP 500 error. If that happens immediately, remove the two lines (using file access or the host’s recovery tools) and switch to the configuration method supported by the site’s PHP execution mode. The PHP per-directory configuration documentation distinguishes these modes.
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Raise Nginx’s request-body limit when applicable
Nginx has a separate ceiling called client_max_body_size. It limits the complete request body, not just the file. The documented default is 1m, and the directive is valid in the http, server, and location contexts. In the relevant Nginx configuration, set it at least as high as PHP’s post_max_size:
client_max_body_size 80m;Use the smallest scope that covers the WordPress upload endpoint, or set it at the server level if that is how your configuration is organized. Validate the Nginx configuration and reload Nginx according to your operating system’s service procedure. The official client_max_body_size documentation lists the syntax and contexts.
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If Nginx rejects the request before PHP receives it, the client may show a generic upload failure while the server returns 413 Request Entity Too Large. Raising WordPress’s displayed value cannot bypass that earlier rejection. A reverse proxy, CDN, load balancer, or Apache layer in front of PHP may impose another request limit as well; each layer must permit a body at least as large as the intended POST.
Allow enough time and temporary storage
Receiving a slow upload
Large files over a slow connection can fail while PHP is still receiving the request. Review these PHP directives when a size increase produces timeout errors:
max_input_time = 300
max_execution_time = 300max_input_time controls how long PHP may receive and parse request data, including file uploads. max_execution_time controls script execution after request processing begins. Increasing only the execution time does not necessarily fix a timeout that occurs during transfer. The PHP file-upload pitfalls documentation explains this distinction.
Set values appropriate for your server’s capacity and traffic. Longer limits keep workers occupied for longer, so raising them indiscriminately can reduce concurrency on a small server. If a proxy or load balancer has its own idle or request timeout, PHP settings alone cannot extend that upstream limit.
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Writing the temporary upload file
PHP first writes an uploaded file to a temporary directory. If upload_tmp_dir is configured, that directory must exist and be writable by the PHP process. If it is not configured, PHP attempts to use the system temporary directory. Check free space, permissions, and any container or hosting quota on that location. The PHP core configuration manual documents upload_tmp_dir and the related directives.
A full temporary directory can make a small upload fail, while a large upload can exhaust space even when the final WordPress media directory has room. Leave capacity for the temporary copy and for WordPress’s generated image sizes if the file is an image.
Submitting many files at once
max_file_uploads limits the number of files in one request, separately from their byte size. The PHP manual lists a default of 20. Increasing the maximum size does not increase this count. If a gallery or batch form submits more files than the count allows, raise max_file_uploads deliberately or divide the operation into smaller batches, subject to the limits your host permits.
Verify the change in WordPress
- Wait for the
.user.inicache interval, or reload/restart the relevant PHP-FPM or web-server service after editing server configuration. - Open Tools > Site Health > Info > Media handling.
- Confirm that Max size of an uploaded file, Max size of post data allowed, and Max effective file size show the intended relationship and values.
- Open Media > Add New and check Maximum upload file size there as well.
- Test with a file slightly below the displayed target, not a file exactly equal to it. Multipart overhead can make the complete POST larger than the file, which is why
post_max_sizeshould exceedupload_max_filesize.
Use a nonessential test file and remove it afterward. If the value remains unchanged, the web PHP process is probably reading another configuration file, the host is overriding the setting, or a cache has not expired. Recheck the PHP version and SAPI used by the website rather than relying on command-line output.
Troubleshoot by the symptom
| Symptom | Likely layer | Action |
|---|---|---|
| Site Health still shows the old value | Wrong PHP configuration, provider override, or unexpired .user.ini cache |
Wait up to the documented cache interval, verify the web PHP version and execution mode, and apply the change in the provider’s web-PHP settings. |
| Upload ends with HTTP 413 | Nginx or another request-body gateway | Raise client_max_body_size and check any proxy or CDN limit so it is at least as large as post_max_size. |
Site returns HTTP 500 immediately after editing .htaccess |
Unsupported Apache/PHP directive syntax | Remove the php_value lines and use .user.ini, php.ini, a hosting panel, or host support. |
| Small files work but large, slow transfers time out | max_input_time, upstream timeout, or unstable connection |
Review input and proxy timeouts; changing only max_execution_time may not address the receiving phase. |
| PHP reports a temporary-file or upload error | Missing permissions, full upload_tmp_dir, or full system temporary storage |
Check the configured directory, PHP-process permissions, available disk space, and hosting quotas. |
| One file uploads but a batch does not | max_file_uploads or a request-size limit |
Count the submitted files, compare with the PHP count limit, and split the batch or raise the count where permitted. |
| WordPress shows a higher value but the request still fails | Web server, reverse proxy, CDN, disk, or security layer | Inspect the HTTP status and server logs, then raise or adjust the limiting layer rather than changing WordPress code. |
Common fixes that do not change the server limit
Adding a fictional WordPress constant
Do not add define('UPLOAD_MAX_FILESIZE', '64M'); to wp-config.php. WordPress does not provide a UPLOAD_MAX_FILESIZE constant that changes PHP’s upload ceiling. The relevant values are PHP directives, which WordPress reads when calculating the effective size. See the wp_max_upload_size() reference and the PHP core configuration manual.
Looking for a normal WordPress Settings control
Standard WordPress does not include a general dashboard setting for increasing the server’s PHP upload limit. Tools > Site Health > Info displays configuration data; it does not edit it. A host-provided panel or server-level change is required.
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Lowering post_max_size below the file limit
A configuration such as upload_max_filesize = 64M with post_max_size = 32M cannot provide a dependable 64 MB upload. The complete request is capped at 32 MB, and PHP requires the POST limit to be larger than the file limit. Keep the POST setting higher and allow overhead.
Assuming every .htaccess recipe is portable
php_value directives work only where Apache is running PHP in a compatible module mode. They can break CGI/FastCGI sites. Identify the PHP execution mode first, or use the host’s supported settings interface.
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A safe sizing example
Suppose your largest planned media file is about 60 MB. A coherent configuration could be:
| Layer | Setting | Example value | Purpose |
|---|---|---|---|
| PHP | upload_max_filesize |
64M |
Allows one file up to the chosen file ceiling. |
| PHP | post_max_size |
80M |
Leaves room for multipart request overhead. |
| Nginx, if present | client_max_body_size |
80m |
Prevents Nginx from rejecting the complete POST first. |
| PHP, if transfers are slow | max_input_time |
300 |
Provides up to five minutes to receive and parse input, subject to other infrastructure limits. |
After applying the values, verify the effective size in Site Health and test below the target. The example is a configuration pattern, not a guarantee that a particular host permits those values or that every upstream gateway uses the same defaults.
When the host will not allow a larger limit
Some shared or managed environments enforce maximum PHP values, restrict .user.ini, or place a request-size limit in a proxy you cannot administer. In that situation, ask the provider which maximum values are available for the site’s web PHP version and whether Nginx, Apache, a load balancer, or a CDN adds another cap. If the provider cannot raise the limit, use smaller upload batches or a transfer workflow supported by that environment rather than repeatedly changing WordPress files. Any workaround still has to fit the server’s request, timeout, temporary-storage, and disk constraints.
The reliable sequence is therefore: measure the web-facing PHP values, set upload_max_filesize, set a larger post_max_size, align Nginx or other request limits, allow enough input time and temporary space, and verify with a below-limit test in WordPress.
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