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Invent a cache key salt #166

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Invent a cache key salt #166

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9 changes: 8 additions & 1 deletion object-cache.php
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Original file line number Diff line number Diff line change
Expand Up @@ -12,8 +12,15 @@

// Users with setups where multiple installs share a common wp-config.php or $table_prefix
// can use this to guarantee uniqueness for the keys generated by this object cache
// If WP_CACHE_KEY_SALT is not set, generate a key from DB parameters and blog id
if ( ! defined( 'WP_CACHE_KEY_SALT' ) ) {
define( 'WP_CACHE_KEY_SALT', '' );
if ( defined('DB_NAME') && defined('DB_USER') && defined('DB_PASSWORD') && defined('DB_HOST')) {
global $blog_id, $table_prefix;
define( 'WP_CACHE_KEY_SALT', md5( DB_NAME . ":" . DB_USER . ":" . DB_PASSWORD . ":" . DB_HOST . ":" . $table_prefix . ":" . $blog_id ) );
}
else {
define( 'WP_CACHE_KEY_SALT', '' );
}
}

function wp_cache_add( $key, $data, $group = '', $expire = 0 ) {
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