Warning: This is just a test for dev installs and not production sites

我只找到了这个blog post 亨利·贝诺特著。在这里，他举例说明了如何修改3.9.1核心，以绕过核心限制。

这里有一个必须使用的插件/wp-content/mu-plugins/wpse-ms-on-different-port.php 我们试图避免核心修改的地方：

<?php 
/**
 * Test for multisite support on a different port than :80 and :443 (e.g. :8080)
 *
 * Here we assume that the \'siteurl\' and \'home\' options contain the :8080 port
 *
 * WARNING: Not suited for production sites!
 */

/**
 * Get around the problem with wpmu_create_blog() where sanitize_user()  
 * strips out the semicolon (:) in the $domain string
 * This means created sites with hostnames of 
 * e.g. example.tld8080 instead of example.tld:8080
 */
add_filter( \'sanitize_user\', function( $username, $raw_username, $strict )
{
    // Edit the port to your needs
    $port = 8080;

    if(    $strict                                                // wpmu_create_blog uses strict mode
        && is_multisite()                                         // multisite check
        && $port == parse_url( $raw_username, PHP_URL_PORT )      // raw domain has port 
        && false === strpos( $username, \':\' . $port )             // stripped domain is without correct port
    )
        $username = str_replace( $port, \':\' . $port, $username ); // replace e.g. example.tld8080 to example.tld:8080

    return $username;
}, 1, 3 );

/**
 * Temporarly change the port (e.g. :8080 ) to :80 to get around 
 * the core restriction in the network.php page.
 */
add_action( \'load-network.php\', function()
{
    add_filter( \'option_active_plugins\', function( $value )
    {
        add_filter( \'option_siteurl\', function( $value )
        {
            // Edit the port to your needs
            $port = 8080;

            // Network step 2
            if( is_multisite() || network_domain_check() )
                return $value;

            // Network step 1
            static $count = 0;
            if( 0 === $count++ )
                $value = str_replace( \':\' . $port, \':80\', $value );
            return $value;
        } );
        return $value;
    } );
} );