mcrypt may cause future problems (PHP >= 7.1)

[atbostudio]

following Methods are marked as deprecated:

• mcrypt_create_iv (@see http://php.net/manual/de/function.mcrypt-create-iv.php)
• mcrypt_encrypt (@see http://php.net/manual/de/function.mcrypt-encrypt.php)
• mcrypt_get_iv_size (@see http://php.net/manual/de/function.mcrypt-get-iv-size.php)
• mcrypt_decrypt (@see http://php.net/manual/de/function.mcrypt-decrypt.php)

mcrypt is abandonware!

encryption/decryption could be done with openssl_encrypt/openssl_decrypt.
why?, see following pros:

• better security
• performance -> it's way faster
• maintainability
• portability

(@see https://secure.php.net/openssl_encrypt, https://secure.php.net/openssl_decrypt)

[vespino]

The most certainly do.

[09-Apr-2017 09:39:17 UTC] PHP Fatal error: Uncaught Error: Call to undefined function mcrypt_create_iv() in /var/www/html/wp-content/plugins/wp-multisite-sso/wp-multisite-sso.php:139
Stack trace:
#0 /var/www/html/wp-includes/class-wp-hook.php(298): WP_MultiSite_SSO::handle_login('user', Object(WP_User))
#1 /var/www/html/wp-includes/class-wp-hook.php(323): WP_Hook->apply_filters(NULL, Array)
#2 /var/www/html/wp-includes/plugin.php(453): WP_Hook->do_action(Array)
#3 /var/www/html/wp-includes/user.php(104): do_action('wp_login', 'user', Object(WP_User))
#4 /var/www/html/wp-login.php(787): wp_signon(Array, false)
#5 {main}
thrown in /var/www/html/wp-content/plugins/wp-multisite-sso/wp-multisite-sso.php on line 139