Description:
------------
When creating private and public keys, there are some problems. With the option "config" I have the configuration file "C:\php\extras\ssl\openssl.cnf" deposited, but I get only the public key. PHP insists on taking the configuration file located in "C:\usr\local\ssl\openssl.cnf".

Test script:
---------------
<?php

    // C:\Users\User\Desktop\php-openssl-certificate-example.cmd

    // @echo off

    // title PHP Development Server

    // cd "%cd%"

    // "C:\php\php.exe" "php-openssl-certificate-example.php"

    // pause

    // C:\Users\User\Desktop\php-openssl-certificate-example.php [PID:9676][PHP:7.3.3]

    //-------------------------------------------------
    // HEAD
    //-------------------------------------------------

    declare( strict_types = 1 );

    header( 'Content-Type:text/plain' );

    error_reporting( E_ALL );

    ini_set( 'display_errors', '1' );

    ini_set( 'html_errors', '0' );

    define( 'CORE_DIR', dirname( __FILE__ ) . DIRECTORY_SEPARATOR );

    isset( $argv ) or trigger_error( 'This is a command terminal application.', E_USER_ERROR );

    echo __FILE__ . ' [PID:' . getmypid() . '][PHP:' . phpversion() . ']' . PHP_EOL . PHP_EOL;

    extension_loaded( 'openssl' ) or dl( 'openssl' ) or trigger_error( 'The openssl extension is required.', E_USER_ERROR );

    //-------------------------------------------------
    // CERTIFICATE LOCATIONS
    //-------------------------------------------------

    $array_of_certificate_locations = openssl_get_cert_locations();

    echo var_export( $array_of_certificate_locations, true ) . PHP_EOL;

    // The ".rnd" file is created at the point of execution. In my case on the desktop. And not as planned in the specified directory.

    // $file_path = $array_of_certificate_locations[ 'default_default_cert_area' ] . DIRECTORY_SEPARATOR . '.rnd';

    // file_exists( $file_path ) or touch( $file_path );

    // is_writeable( $file_path ) or trigger_error( 'The file (' . $file_path . ') does not exist or is not writable.', E_USER_ERROR );

    //-------------------------------------------------
    // CREATE PRIVATE AND PUBLIC KEY
    //-------------------------------------------------

    $options = array();

    $options[ 'config' ] = realpath( 'C:\php' . DIRECTORY_SEPARATOR . 'extras/ssl\\openssl.cnf' ); // Returns: only public key

    // $options[ 'config' ] = realpath( 'C:\usr\local\ssl\renamed_openssl.cnf' ); // Returns: only public key

    // $options[ 'config' ] = realpath( 'C:\usr\local\ssl\openssl.cnf' ); // Returns: private and public key

    // $options[ 'encrypt_key' ] = true; // If I set this value true, where do I deposit the password?

    $options[ 'digest_alg' ] = 'sha512';

    $options[ 'private_key_bits' ] = 1024;

    $options[ 'private_key_type' ] = OPENSSL_KEYTYPE_RSA;

    $openssl_resource = openssl_pkey_new( $options ) or trigger_error( 'An error occurred while processing the configuration.', E_USER_ERROR );

    // openssl_pkey_export( $openssl_resource, $private_key, $passphrase = 'password' ); // Is $passphrase set only if encrypt_key is true?

    openssl_pkey_export( $openssl_resource, $private_key );

    echo $private_key . PHP_EOL . PHP_EOL;

    $public_key = openssl_pkey_get_details( $openssl_resource );

    $public_key = $public_key[ 'key' ];

    echo $public_key . PHP_EOL . PHP_EOL;

    //-------------------------------------------------
    // PLAINTEXT
    //-------------------------------------------------

    // $plaintext = 'plaintext data goes here';

    // echo $plaintext . PHP_EOL . PHP_EOL;

    //-------------------------------------------------
    // OPENSSL PRIVATE ENCRYPT
    //-------------------------------------------------

    // Encrypt data with the private key.

    // openssl_private_encrypt( $plaintext, $private_encrypted, $private_key );

    // echo 'openssl_private_encrypt' . PHP_EOL . PHP_EOL . bin2hex( $private_encrypted ) . PHP_EOL . PHP_EOL;

    //-------------------------------------------------
    // OPENSSL PUBLIC DECRYPT
    //-------------------------------------------------

    // Data encrypted with the private key, now decrypted with the public key.

    // openssl_public_decrypt( $private_encrypted, $public_decrypted, $public_key );

    // echo 'openssl_public_decrypt' . PHP_EOL . PHP_EOL . $public_decrypted . PHP_EOL . PHP_EOL;

    //-------------------------------------------------
    // OPENSSL PUBLIC ENCRYPT
    //-------------------------------------------------

    // Encrypt data with the public key.

    // openssl_public_encrypt( $plaintext, $public_encrypted, $public_key );

    // echo 'openssl_public_encrypt' . PHP_EOL . PHP_EOL . bin2hex( $public_encrypted ) . PHP_EOL . PHP_EOL;

    //-------------------------------------------------
    // OPENSSL PRIVATE DECRYPT
    //-------------------------------------------------

    // Data encrypted with the public key, now decrypted with the private key.

    // openssl_private_decrypt( $public_encrypted, $private_decrypted, $private_key );

    // echo 'openssl_private_decrypt' . PHP_EOL . PHP_EOL . $private_decrypted . PHP_EOL . PHP_EOL;

    //-------------------------------------------------
    // ERROR HANDLING
    //-------------------------------------------------

    // echo openssl_error_string() . PHP_EOL . PHP_EOL;

?>

Expected result:
----------------
array (
  'default_cert_file' => 'C:\\usr\\local\\ssl/cert.pem',
  'default_cert_file_env' => 'SSL_CERT_FILE',
  'default_cert_dir' => 'C:\\usr\\local\\ssl/certs',
  'default_cert_dir_env' => 'SSL_CERT_DIR',
  'default_private_dir' => 'C:\\usr\\local\\ssl/private',
  'default_default_cert_area' => 'C:\\usr\\local\\ssl',
  'ini_cafile' => '',
  'ini_capath' => '',
)
-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----


-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC+2eGdcfd/uJ5TvTCwwZMzrMKj
wuhN87S/KD7oZ/IXwamdMW+VafsjKfTfsrvlA5z5+m1MzPiV9amX0lCWP4CcRSAd
0ctkwLCnR2+uOUChMLiFhDBjuyLi8dt3g+QY8g6yeoUlakK1nn0Bp3l9paVn3eyz
wQbBHTAr4Rki4dclGwIDAQAB
-----END PUBLIC KEY-----

Actual result:
--------------
array (
  'default_cert_file' => 'C:\\usr\\local\\ssl/cert.pem',
  'default_cert_file_env' => 'SSL_CERT_FILE',
  'default_cert_dir' => 'C:\\usr\\local\\ssl/certs',
  'default_cert_dir_env' => 'SSL_CERT_DIR',
  'default_private_dir' => 'C:\\usr\\local\\ssl/private',
  'default_default_cert_area' => 'C:\\usr\\local\\ssl',
  'ini_cafile' => '',
  'ini_capath' => '',
)


-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDEvBAJCSq/sJalTyvKOJvr/Avd
6vaSB3hIPnnsxC3nknyudbv5DYOyOUAf0gGaPjGyUyy/5UCWNaA7h5gPyAMigzMg
EEikpfJxqoDqM3heMB5dU08hP/2QLVRW+ZJNUawrJhfz9fexuKgbzUM+OZrz6uWl
zuNKJlpl1rumqYJK3QIDAQAB
-----END PUBLIC KEY-----