Can You Change the max_input_vars in PHP 5.1.6?

Overcoming PHP 5.1.6 max_input_vars Issue

Are you encountering a max_input_vars error message despite running PHP version 5.1.6? You're not alone. This article sheds light on this issue and provides solutions.

Background

In PHP 5.3.9 and later, you can adjust the max_input_vars setting via the php.ini file. However, PHP 5.1.6 lacks this option.

Question

Does the fact that phpinfo() displays a max_input_vars value in PHP 5.1.6 imply that it's hard-coded and unchangeable?

Answer

No, it does not mean it's hard-coded. According to PHP documentation, the max_input_vars directive can only be set at the directory scope. This can be done through .htaccess, httpd.conf, or .user.ini (available from PHP 5.3).

Solutions

To increase the max_input_vars limit in PHP 5.1.6, consider the following:

1. .htaccess: Add the following lines to your .htaccess file residing in the root directory of your web application:

php_value max_input_vars 3000

2. httpd.conf: If using an Apache web server, you can add the directive to the root directory configuration in httpd.conf:

<virtualhost>
  <directory>
    php_value max_input_vars 3000
  </directory>
</virtualhost>

3. .user.ini: Create a file named .user.ini in the root directory of your application:

max_input_vars=3000

Please note that changing the max_input_vars directive requires a server restart to take effect. Additionally, if you're using a Suhosin patch for PHP, you may need to adjust its relevant settings as well. For more information on that, refer to the Suhosin documentation.

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