How does the choice of character encoding affect the output of htmlentities in PHP forms?

The choice of character encoding can affect the output of htmlentities in PHP forms by determining how special characters are encoded. To ensure that htmlentities properly encodes characters regardless of the character encoding, it is recommended to specify the character encoding parameter in the htmlentities function. This ensures that special characters are encoded correctly regardless of the chosen character encoding.

// Specify the character encoding parameter in htmlentities function
$encoded_string = htmlentities($input_string, ENT_QUOTES, 'UTF-8');