sodium_hex2bin

(PHP 7 >= 7.2.0)

sodium_hex2bin — Decodes a hexadecimally encoded binary string

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sodium_hex2bin ( string $hex [, string $ignore ] ) : string

Decodes a hexadecimally encoded binary string.

Like sodium_bin2hex(), sodium_hex2bin() is resistant to side-channel attacks while hex2bin() is not.

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hex

Hexadecimal representation of data.

ignore

Optional string argument for characters to ignore.

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Returns the binary representation of the given hex data.