How to Increase the PHP Maximum POST Variable Limit?

PHP Maximum POST Variable Limit

When handling POST requests with numerous input fields, a common issue arises when the number of variables exceeds the default limit in PHP. For example, forms with more than 1000 fields may only expose the first 1001 variables in the $_POST array.

To resolve this issue, it is necessary to adjust the maximum number of POST variables allowed by PHP. Introduced in version 5.3.9, the max_input_vars configuration option controls this limit, which is initially set to 1000.

Changing the Limit

There are multiple ways to modify the max_input_vars value:

• Using php.ini: Edit the php.ini file located in the PHP installation directory. Add or update the following line:

max_input_vars = <desired value></desired>

• Using .htaccess: Create a .htaccess file in the web server's root directory and include the following line:

php_value max_input_vars <desired value></desired>

• Using httpd.conf (Apache only): Add the following line to the httpd.conf file:

php_value max_input_vars <desired value></desired>

After making changes to the configuration, restart the web server to apply the new settings. The maximum number of POST variables allowed should now match the specified max_input_vars value.

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