Display the drop-down list

openssl_pkey_export()

« openssl_get_publickey | openssl_pkey_get_details »
<?php
$key 
openssl_pkey_new(
    
 // [array $n_configargs]
);

$bool openssl_pkey_export (
    
// mixed $key
    
// string &$out
    
// [string $passphrase]
    
  // [array $configargs]
);
?>
Result
$out = '-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----
'
$bool = true
Examples
#1 openssl_pkey_export  ($key,
 
$out,
 
"this is a passphrase")
#2 openssl_pkey_export  (/* $n_configargs = ["digest_alg" => "sha512", "private_key_bits" => 4096, "private_key_type" => OPENSSL_KEYTYPE_RSA] */
 
$key,
 
$out)
See also
openssl_pkey_new