<?php

$a = array("TEST", "@@@");

$x = base64_encode(serialize($a));

 $x ="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";

 echo "in = ".$x."<br><br>";
 
$y = unserialize(base64_decode($x));

echo "out = ".print_r($y)."<br><br>";

?>