wpsnoop: fix WPCS - WordPress Currency Switcher plugin conflicts, errors & issues

When the plugin WPCS - WordPress Currency Switcher conflicts or throws a PHP error we hope wpsnoop can help you to fix the issue quickly.


Discover which shortcodes wp-options PHP functions database tables and files are created by WPCS - WordPress Currency Switcher, plus learn which plugins and/or themes could be in conflict with WPCS - WordPress Currency Switcher.


Troubleshooting theme and plugin conflicts is easier when you know what WPCS - WordPress Currency Switcher leaves behind after uninstalling it from a WordPress installation, there is a list down below for your convenience.

Expert advice is recommended if you are not technically proficient with PHP, MySQL etc. View support options for WPCS - WordPress Currency Switcher


What does WPCS - WordPress Currency Switcher version 1.1.7 add to WordPress? Answers Here.

This is an automatically generated report - it is possible for WPCS - WordPress Currency Switcher to perform differently in your installation, previous versions before 1.1.7 may have created a different set of shortcodes, used different function names or could have created entirely different database tables to store settings and operate. This is not an exhaustive list but shows how version 1.1.7 of WPCS - WordPress Currency Switcher behaves when installed and removed on a clean installation of WordPress.

We have not tested individual shortcodes, features or settings of this plugin but instead have concentrated on the potential for obvious errors and conflicts which can occur, if you need help with the plugin in your local installation you can get WordPress help and support for WPCS - WordPress Currency Switcher by clicking here.

Our testing covered the free version of this plugin there may or may not be a paid version or premium version available for purchase that unlocks additional features and could behave in a slightly or very different manner.

Which new files does WPCS - WordPress Currency Switcher add to WordPress?

This section will populate with a table showing an icon, size and filepath.

Type & Path Size Conflicts
wp-content/plugins/currency-switcher/ 5.02MB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/classes/ 17.22kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/classes/auto_switcher.php 5.37kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/classes/rate_alert.php 4.00kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/classes/storage.php 2.94kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/classes/widgets/ 4.91kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/classes/widgets/widget-currency-converter.php 1.54kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/classes/widgets/widget-currency-rates.php 1.52kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/classes/widgets/widget-wpcs-selector.php 1.85kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/css/ 52.62kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/css/auto_switcher/ 25.35kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/css/auto_switcher/classic_blocks.css 2.20kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/css/auto_switcher/roll_blocks.css 3.46kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/css/auto_switcher/round_chain.css 1.44kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/css/auto_switcher/round_select.css 18.25kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/css/front.css 3.72kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/css/plugin_options.css 23.55kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/fonts/ 1.66MB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/fonts/fontello.eot 353.73kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/fonts/fontello.svg 765.48kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/fonts/fontello.ttf 353.56kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/fonts/fontello.woff 223.68kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/img/ 363.42kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/img/100125.png 6.09kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/img/admin_preloader.gif 13.67kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/img/arrow-right.png 498.00B No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/img/drop-ship.jpg 30.02kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/img/envato-mid-sale-2020.png 40.36kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/img/mdtf_banner.jpg 38.79kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/img/move.png 1.70kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/img/no_flag.png 1.70kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/img/off40sale-590x60.jpg 37.99kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/img/woobe_banner.png 46.74kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/img/woocs_banner.png 63.08kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/img/woof_banner.png 43.14kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/img/wpcs_banner.png 39.04kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/img/wpcs_price_info_icon.png 636.00B No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/index.php 77.32kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/ 642.96kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/auto_switcher/ 908.00B No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/auto_switcher/round_select.js 908.00B No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/chosen/ 374.78kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/chosen/chosen-dark.css 2.59kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/chosen/chosen-sprite-dark.png 656.00B No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/chosen/chosen-sprite.png 646.00B No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/chosen/[email protected] 872.00B No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/chosen/chosen.css 13.57kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/chosen/chosen.jquery.js 42.28kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/chosen/chosen.jquery.min.js 26.23kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/chosen/chosen.min.css 10.50kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/chosen/chosen.proto.js 43.06kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/chosen/chosen.proto.min.js 26.62kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/chosen/docsupport/ 24.98kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/chosen/docsupport/chosen.png 3.39kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/chosen/docsupport/oss-credit.png 6.55kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/chosen/docsupport/prism.css 1.56kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/chosen/docsupport/prism.js 6.51kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/chosen/docsupport/style.css 6.96kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/chosen/index.html 85.18kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/chosen/index.proto.html 85.62kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/chosen/options.html 12.03kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/front.js 11.90kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/jquery.ddslick.min.js 7.00kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/modernizr.js 3.47kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/plugin_options.js 16.87kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/wselect/ 228.05kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/wselect/img/ 105.94kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/wselect/img/archery.png 825.00B No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/wselect/img/arrow-down-black.png 47.58kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/wselect/img/arrow-down.png 430.00B No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/wselect/img/AU.png 442.00B No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/wselect/img/baseball.png 799.00B No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/wselect/img/basketball.png 791.00B No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/wselect/img/CA.png 389.00B No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/wselect/img/curling.png 813.00B No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/wselect/img/PL.png 290.00B No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/wselect/img/skiing.png 709.00B No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/wselect/img/soccer.png 51.04kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/wselect/img/TH.png 289.00B No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/wselect/img/UK.png 542.00B No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/wselect/img/US.png 389.00B No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/wselect/img/volleyball.png 782.00B No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/wselect/lib/ 90.93kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/wselect/lib/jquery.1.10.2.min.js 90.93kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/wselect/README.md 3.90kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/wselect/wSelect.css 5.23kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/wselect/wSelect.jquery.json 1.00kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/wselect/wSelect.js 15.04kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/js/wselect/wSelect.min.js 6.02kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/languages/ 19.93kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/languages/currency-switcher-en_US.po 19.93kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/lib/ 2.09MB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/lib/geo-ip/ 222.08kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/lib/geo-ip/geoip.inc 45.06kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/lib/geo-ip/geoipcity.inc 5.34kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/lib/geo-ip/geoipregionvars.php 101.89kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/lib/geo-ip/timezone.php 69.79kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/lib/GeoIP.dat 1.87MB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/log.txt No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/readme.txt 12.21kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/ 115.81kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/auto_switcher/ 5.72kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/auto_switcher/classic_blocks.php 1.16kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/auto_switcher/roll_blocks.php 2.51kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/auto_switcher/round_select.php 2.05kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/plugin_options.php 59.12kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/shortcodes/ 42.95kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/shortcodes/styles/ 33.50kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/shortcodes/styles/for-menu/ 2.12kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/shortcodes/styles/for-menu/actions.js 841.00B No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/shortcodes/styles/for-menu/styles.css 1.30kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/shortcodes/styles/style-1/ 6.62kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/shortcodes/styles/style-1/actions.js 1.98kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/shortcodes/styles/style-1/index.php 2.56kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/shortcodes/styles/style-1/styles.css 2.08kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/shortcodes/styles/style-2/ 11.06kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/shortcodes/styles/style-2/actions.js 2.28kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/shortcodes/styles/style-2/index.php 4.50kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/shortcodes/styles/style-2/styles.css 4.27kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/shortcodes/styles/style-3/ 13.70kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/shortcodes/styles/style-3/actions.js 2.36kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/shortcodes/styles/style-3/index.php 3.94kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/shortcodes/styles/style-3/styles.css 7.40kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/shortcodes/wpcs_check_country.php 425.00B No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/shortcodes/wpcs_converter.php 1.92kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/shortcodes/wpcs_current_currency.php 621.00B No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/shortcodes/wpcs_rates.php 2.09kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/shortcodes/wpcs.php 4.42kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/widgets/ 8.02kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/widgets/converter_form.php 1.22kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/widgets/converter.php 839.00B No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/widgets/rates_form.php 1.22kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/widgets/rates.php 843.00B No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/widgets/selector_form.php 2.80kB No known conflicts with other themes or plugins.
wp-content/plugins/currency-switcher/views/widgets/selector.php 1.14kB No known conflicts with other themes or plugins.

Which new shortcodes does WPCS - WordPress Currency Switcher add to WordPress?

ShortCode   Known Plugin or Theme conflicts
[wpcs] The wpcs shortcode doesn't have any known conflicts with other themes or plugins.
[wpcs_check_country] The wpcs_check_country shortcode doesn't have any known conflicts with other themes or plugins.
[wpcs_code_rate] The wpcs_code_rate shortcode doesn't have any known conflicts with other themes or plugins.
[wpcs_converter] The wpcs_converter shortcode doesn't have any known conflicts with other themes or plugins.
[wpcs_current_currency] The wpcs_current_currency shortcode doesn't have any known conflicts with other themes or plugins.
[wpcs_price] The wpcs_price shortcode doesn't have any known conflicts with other themes or plugins.
[wpcs_rates] The wpcs_rates shortcode doesn't have any known conflicts with other themes or plugins.

Note: We have not yet checked to see if these shortcodes work as expected in pages, posts, sidebar widgets, or when set as the page title, in content, in the excert, in menus or anywhere else within a WordPress installation. A shortcode could produce errors due to parameters added when it is used, or if the plugin is updated and the format of the shortcode has changed.

Which new database tables are created by the WordPress plugin WPCS - WordPress Currency Switcher?

Which new options are added to the wp-options table by WPCS - WordPress Currency Switcher?

Option Name   Known Conflicts
widget_wpcs_converter The widget_wpcs_converter option doesn't have any known conflicts with other themes or plugins.
widget_wpcs_rates The widget_wpcs_rates option doesn't have any known conflicts with other themes or plugins.
widget_wpcs_selector The widget_wpcs_selector option doesn't have any known conflicts with other themes or plugins.
wpcs_first_activation The wpcs_first_activation option doesn't have any known conflicts with other themes or plugins.

During use WPCS - WordPress Currency Switcher may or may not create more options depending on how the plugin is configured and depending on which other themes and plugins are active in your specific hosting environment.

What new PHP functions does WPCS - WordPress Currency Switcher declare when it is active?

Function   Conflicts Common Errors
_common_get_org 15 conflicts Fatal error: Cannot redeclare _common_get_org()
_geoip_seek_country 18 conflicts Fatal error: Cannot redeclare _geoip_seek_country()
_geoip_seek_country_v6 15 conflicts Fatal error: Cannot redeclare _geoip_seek_country_v6()
_get_org 19 conflicts Fatal error: Cannot redeclare _get_org()
_get_org_v6 16 conflicts Fatal error: Cannot redeclare _get_org_v6()
_get_region 18 conflicts Fatal error: Cannot redeclare _get_region()
_safe_substr 7 conflicts Fatal error: Cannot redeclare _safe_substr()
_setup_segments 18 conflicts Fatal error: Cannot redeclare _setup_segments()
_sharedmemread 2 conflicts Fatal error: Cannot redeclare _sharedmemread()
geoip_close 18 conflicts Fatal error: Cannot redeclare geoip_close()
geoip_country_code_by_addr 18 conflicts Fatal error: Cannot redeclare geoip_country_code_by_addr()
geoip_country_code_by_addr_v6 15 conflicts Fatal error: Cannot redeclare geoip_country_code_by_addr_v6()
geoip_country_code_by_name 18 conflicts Fatal error: Cannot redeclare geoip_country_code_by_name()
geoip_country_code_by_name_v6 15 conflicts Fatal error: Cannot redeclare geoip_country_code_by_name_v6()
geoip_country_id_by_addr 18 conflicts Fatal error: Cannot redeclare geoip_country_id_by_addr()
geoip_country_id_by_addr_v6 15 conflicts Fatal error: Cannot redeclare geoip_country_id_by_addr_v6()
geoip_country_id_by_name 18 conflicts Fatal error: Cannot redeclare geoip_country_id_by_name()
geoip_country_id_by_name_v6 15 conflicts Fatal error: Cannot redeclare geoip_country_id_by_name_v6()
geoip_country_name_by_addr 18 conflicts Fatal error: Cannot redeclare geoip_country_name_by_addr()
geoip_country_name_by_addr_v6 15 conflicts Fatal error: Cannot redeclare geoip_country_name_by_addr_v6()
geoip_country_name_by_name 18 conflicts Fatal error: Cannot redeclare geoip_country_name_by_name()
geoip_country_name_by_name_v6 15 conflicts Fatal error: Cannot redeclare geoip_country_name_by_name_v6()
geoip_load_shared_mem 18 conflicts Fatal error: Cannot redeclare geoip_load_shared_mem()
geoip_name_by_addr 14 conflicts Fatal error: Cannot redeclare geoip_name_by_addr()
geoip_name_by_addr_v6 15 conflicts Fatal error: Cannot redeclare geoip_name_by_addr_v6()
geoip_open 18 conflicts Fatal error: Cannot redeclare geoip_open()
geoip_org_by_addr 18 conflicts Fatal error: Cannot redeclare geoip_org_by_addr()
geoip_region_by_addr 19 conflicts Fatal error: Cannot redeclare geoip_region_by_addr()

Using WPCS - WordPress Currency Switcher from the command line with WP-CLI

The following commands are provided for convenience and should only be used if you understand how WP-CLI works. These commands refer to a single WordPress instance and may need to be modified if you are working with a Multisite installation.


How to install WPCS - WordPress Currency Switcher from the command line with WP-CLI

Navigate to the root of your WordPress installation and type the following command:

wp plugin install currency-switcher


How to activate WPCS - WordPress Currency Switcher from the command line with WP-CLI

To immediately activate WPCS - WordPress Currency Switcher after WP-CLI downloads the latest version you can use the following command:

wp plugin install currency-switcher --activate


How to reinstall WPCS - WordPress Currency Switcher from the command line with WP-CLI

To force a reinstallation of WPCS - WordPress Currency Switcher which overwrites the current plugin without asking for confirmation you can use the following command:

wp plugin install currency-switcher --force


How to update WPCS - WordPress Currency Switcher to the latest version from the command line with WP-CLI

wp plugin update currency-switcher


How to delete WPCS - WordPress Currency Switcher from the command line with WP-CLI

wp plugin delete currency-switcher

Where can you download earlier versions of WPCS - WordPress Currency Switcher?

Whenever possible you should use the latest version of plugins and themes, however if you have recently updated and discovered that you need to install an earlier version you may be able to download other versions of WPCS - WordPress Currency Switcher from the WordPress repository by visiting this link.

Please note that installing earlier versions of a theme or plugin is not generally a recommended course of action for most users and could re-introduce security, stability or other issues in WPCS - WordPress Currency Switcher

About our testing enviroment

Tests were conducted using Apache 2.4.29, PHP 7.2 on Ubuntu 18.04, MySQL 5.7.33 and WordPress 5.9

It is very possible that different versions of PHP such as PHP 8.0, PHP 7.4, or PHP 7.3 could behave differently with WPCS - WordPress Currency Switcher. Different versions of WordPress could implement the features of this plugin in slightly different ways as well.