sodium_pad

(PHP 7 >= 7.2.0, PHP 8)

sodium_pad — Add padding data

function sodium_pad(#[\SensitiveParameter] string $string, int $block_size): string

Right-pad a string to a desired length. Timing-safe.

string: Unpadded string.
block_size: The string will be padded until it is an even multiple of the block size.

Padded string.