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php 的 mcrypt_ 函数在 7.1.0 版本中开始 deprecated，并在 7.2.0 版本中彻底废弃并移入PECL。 mcrypt 虽说被遗弃了，但 文档页 上依然有很多值得注意的文档贡献，有助于我们将 mcrypt 迁移至 openssl，大家应该仔细看一下。 1.If you're writing code to encrypt/encrypt data in 2015, you should use openssl_encrypt() and openssl_decrypt(). The underlying library (libmcrypt) has been abandoned since 2007, and performs far worse than OpenSSL (which leverages AES-NI on modern processors and is cac……