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PHP获取postgresql数据库BOLB字段

$a = pg_fetch_array($result, 0, PGSQL_ASSOC);

var_dump($a['productname']);

下面为输出结果:
string(286) "xe38090e4baace4b89ce8b685e5b882e38091e4b887e8b1a1efbc8857414e5849414e47efbc89533132504c203433304d4ce5ae9ee794a8e59586e58aa1e59e8be4bf9de6b8a9e69daf20e58f8ce5b182e88090e783ade58a9ee585ace6b0b4e69daf20e5b8a6e88cb6e6bc8fe6bba4e7bd91e6898be69f84e69dafe7a4bce79b92e8a38520e586b7e985b7e9bb91"

我该如何把它还原成字符串?


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