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<p>Generates cryptographically secure pseudo-random bytes <a class="el" href="patch2_8txt.html#a3f9992ab8fa942ed02faa63682c3a84c">int $length The length of the random string that should be returned in bytes.  string Returns a string containing the requested number of cryptographically secure random bytes.  7.0  Exception if it was not possible to gather sufficient entropy. </a></p>

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