使用PHP在WordPress中使用国家/地区代码动态重写子文件夹

function prepend_default_rewrite_rules( $rules ) {

// Prepare for new rules
$new_rules = [];

// Set up languages,except default one,get user language code
$user = get_current_user_id();  
$language_slugs = (array) get_user_meta($user->ID,'country_code');

// Generate language slug regex
$languages_slug = '(?:' . implode( '/|',$language_slugs ) . '/)?';


// Set up the list of rules that don't need to be prefixed
$whitelist = [
    '^wp-json/?$','^wp-json/(.*)?','^index.php/wp-json/?$','^index.php/wp-json/(.*)?'
];

// Set up the new rule for home page
$new_rules['(?:' . implode( '/|',$language_slugs ) . ')/?$'] = 'index.php';

// Loop through old rules and modify them
foreach ( $rules as $key => $rule ) {

    // Re-add those whitelisted rules without modification
    if ( in_array( $key,$whitelist ) ) {

        $new_rules[ $key ] = $rule;

    // Update rules starting with ^ symbol
    } elseif ( substr( $key,1 ) === '^' ) { 

        $new_rules[ $languages_slug . substr( $key,1 ) ] = $rule;


    // Update other rules
    } else {

        $new_rules[ $languages_slug . $key ] = $rule;

    }
}


 // Return out new rules
 return $new_rules;
}
add_filter( 'rewrite_rules_array','prepend_default_rewrite_rules' );