(PHP 4 >= 4.2.0, PHP 5, PHP 7)
openssl_csr_export — Exports a CSR as a string
openssl_csr_export ( mixed $csr , string &$out [, bool $notext = true ] ) : bool
openssl_csr_export() takes the Certificate Signing Request represented by csr and stores it in PEM format in out, which is passed by reference.
csr
See CSR parameters for a list of valid values.
out
on success, this string will contain the PEM encoded CSR
notext
The optional parameter notext affects the verbosity of the output; if it is false, then additional human-readable information is included in the output. The default value of notext is true.
Returns true on success or false on failure.
Example #1 openssl_csr_export() example
<?php $subject = array( "commonName" => "example.com", ); $private_key = openssl_pkey_new(array( "private_key_bits" => 2048, "private_key_type" => OPENSSL_KEYTYPE_RSA, )); $configargs = array( 'digest_alg' => 'sha256WithRSAEncryption' ); $csr = openssl_csr_new($subject, $private_key, $configargs); openssl_csr_export($csr, $csr_string); echo $csr_string; ?>
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https://www.php.net/manual/en/function.openssl-csr-export.php