Detailed explanation of php generating signature and verifying signature

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php generating signatures and verifying signatures

openssl_sign The default signature_alg parameter is OPENSSL_ALGO_SHA1

If you use DSA encryption, you need to use the OPENSSL_ALGO_DSS1 parameter

　signature_alg Other parameters

　OPENSSL_ALGO_DSS1 (integer)

　OPENSSL_ALGO_SHA1 (integer)

　OPENSSL_ALGO_SHA224 (integer)

　OPENSSL_ALGO_SHA256 (integer)

OPENSSL_ALGO_SHA384 (integer)

OPENSSL_ALGO_SHA512 (integer)

OPENSSL_ALGO_RMD160 (integer)

OPENSSL_ALGO_MD5 (integer)

OPENSSL_ALGO_MD4 (integer)

　OPENSSL_ALGO_MD2 (integer)

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