What could be causing form data to be truncated in PHP?

Form data may be truncated in PHP due to the default configuration settings of PHP, such as the `max_input_vars` and `post_max_size` directives in the php.ini file. To solve this issue, you can increase the values of these directives to accommodate the size of the form data being submitted.

// Increase the max_input_vars directive
ini_set('max_input_vars', 5000);

// Increase the post_max_size directive
ini_set('post_max_size', '20M');