OpenSSL 函数
PHP Manual


(PHP 5 >= 5.2.0, PHP 7)

openssl_pkey_get_detailsReturns an array with the key details


array openssl_pkey_get_details ( resource $key )

This function returns the key details (bits, key, type).



Resource holding the key.


Returns an array with the key details in success or FALSE in failure. Returned array has indexes bits (number of bits), key (string representation of the public key) and type (type of the key which is one of OPENSSL_KEYTYPE_RSA, OPENSSL_KEYTYPE_DSA, OPENSSL_KEYTYPE_DH, OPENSSL_KEYTYPE_EC or -1 meaning unknown).

Depending on the key type used, additional details may be returned. Note that some elements may not always be available.

OpenSSL 函数
PHP Manual