openssl_csr_sign

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Supported Versions: PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8
Sign a CSR with another certificate (or itself) and generate a certificate
<?php openssl_csr_sign(    OpenSSLCertificateSigningRequest|string $csr,    OpenSSLCertificate|string|null $ca_certificate,    OpenSSLAsymmetricKey|OpenSSLCertificate|array|string $private_key,    int $days,    ?array $options = null,    int $serial = 0): OpenSSLCertificate|false