The manual is not constistent at this point. On one hand, it describes the return as digest/fingerprint of a cert, on the other hand it says:
bool openssl_x509_fingerprint( ... )
On PHP 5.6.5, I only get the bool return (1 or 0).
(PHP 5.6, PHP 7)
openssl_x509_fingerprint — Calculates the fingerprint, or digest, of a given X.509 certificate
$x509
[, string $hash_algorithm = "sha1"
[, bool $raw_output = FALSE
]] )
openssl_x509_fingerprint() returns the digest of
x509 as a string.
x509参见密钥／证书参数以获取有效值列表。
hash_algorithmThe digest method or hash algorithm to use, e.g. "sha256", one of openssl_get_md_methods().
raw_output
When set to TRUE, outputs raw binary data. FALSE outputs lowercase hexits.
Returns a string containing the calculated certificate fingerprint as lowercase hexits unless raw_output is set to TRUE in which case the raw binary representation of the message digest is returned.
Returns FALSE on failure.
The manual is not constistent at this point. On one hand, it describes the return as digest/fingerprint of a cert, on the other hand it says:
bool openssl_x509_fingerprint( ... )
On PHP 5.6.5, I only get the bool return (1 or 0).