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→crypto:hmac
| valign='top' | '''Summary'''
|Creates a message authentication code via a cryptographic hash function and a secret key. <br/>
<code>$encoding</code> must either be <code>hex</code>, <code>base64</code> or the empty string and specifies the encoding of the returned authentication code. <b>Default is <code>base64</code></b>.<br/>
<code>$algorithm</code> describes the hash algorithm which is used for encryption. Currently supported are <code>md5</code>, <code>sha1</code>, <code>sha256</code>, <code>sha384</code>, <code>sha512</code>. <b>Default is <code>md5</code></b>.
|-
