Remove padding data

# sodium_unpad

(PHP 7 >= 7.2.0, PHP 8)

sodium_unpad — Remove padding data

### Description

sodium_unpad(#[\SensitiveParameter] string `$string`, int `$block_size`): string

Unpad a padded string. Timing-safe.

### Parameters

`string`
  Padded string.
`block_size`
  The block size for padding.

### Return Values

Unpadded string.

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