(PHP 7 >= 7.2.0, PHP 8)
sodium_base642bin — Decodes a base64-encoded string into raw binary.
sodium_base642bin(#[\SensitiveParameter] string $string, int $id, string $ignore = ""): string
Converts a base64 encoded string into raw binary. Unlike base64_decode(), sodium_base642bin() is constant-time (a property that is important for any code that touches cryptographic inputs, such as plaintexts or keys) and supports multiple character sets.
stringstring; Encoded string.
idSODIUM_BASE64_VARIANT_ORIGINAL for standard (A-Za-z0-9/\+) Base64 encoding. SODIUM_BASE64_VARIANT_ORIGINAL_NO_PADDING for standard (A-Za-z0-9/\+) Base64 encoding, without = padding characters. SODIUM_BASE64_VARIANT_URLSAFE for URL-safe (A-Za-z0-9\-_) Base64 encoding. SODIUM_BASE64_VARIANT_URLSAFE_NO_PADDING for URL-safe (A-Za-z0-9\-_) Base64 encoding, without = padding characters. ignoreCharacters to ignore when decoding (e.g. whitespace characters).
Decoded string.
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https://www.php.net/manual/en/function.sodium-base642bin.php