Scott Reilly

This plugin allows you to restrict the usernames that new users may use when registering for your site.
If open registration is enabled for your site (via Settings -> General -> Membership (“Anyone can register”)), WordPress allows visitors to register for an account on your blog. By default, any username they choose is allowed so long as it isn’t an already existing account and it doesn’t include invalid (i.e. non-alphanumeric) characters.
Possible reasons for wanting to restrict certain usernames:
<ul>
<li>Prevent usernames that contain foul, offensive, or otherwise undesired words</li>
<li>Prevent squatting on usernames that you may want to use in the future (but don’t want to actually create the account for just yet) (essentially placing a hold on the username)</li>
<li>Prevent official-sounding usernames from being used (i.e. help, support, pr, info, sales)</li>
<li>Prevent official username syntax from being used (i.e. if all of your administrators use a prefix to identify themselves, you don’t want a visitor to use that prefix)</li>
<li>Prevent spaces from being used in a username (which WordPress allows by default)</li>
<li>Require that a username starts with, ends with, or contain one of a set of substrings (i.e. “support_”, “admin_”)</li>
<li>Require a minimum number of characters for usernames</li>
<li>Limit usernames to a maximum number of characters</li>
</ul>
When attempting to register with a restricted username, the visitor will be given an error notice that says: 
ERROR: This username is invalid. Please enter a valid username.
NOTE: This plugin does not put any restrictions on usernames that the admin chooses for users when creating user accounts from within the WordPress admin. This only restricts the names that users choose themselves when registering for your site.
SPECIAL NOTE: Many membership plugins implement their own user registration handling that often bypasses checks (and hooks) performed by WordPress. As such, it is unlikely that the plugin is compatible with them without special plugin-specific amendments.
Compatible with Multisite and BuddyPress as well.
Links: <a href="http://coffee2code.com/wp-plugins/restrict-usernames/" rel="nofollow ugc">Plugin Homepage</a> | <a href="https://wordpress.org/plugins/restrict-usernames/" rel="ugc">Plugin Directory Page</a> | <a href="https://github.com/coffee2code/restrict-usernames/" rel="nofollow ugc">GitHub</a> | <a href="http://coffee2code.com" rel="nofollow ugc">Author Homepage</a>
<h3>Hooks</h3>
The plugin exposes one filter for hooking. Typically, customizations utilizing this hook would be put into your active theme’s functions.php file, or used by another plugin.
c2c_restrict_usernames-validate (filter)
The ‘c2c_restrict_usernames-validate’ hook allows you to add your own customized checks for the username being registered. You can add additional restrictions or override the assessment performed by the plugin.
Arguments:
<ul>
<li>$valid (boolean): The assessment by the plugin about the validity of the username based on settings. True means username can be used.</li>
<li>$username (string): The username being registered.</li>
<li>$settings (array): The plugin’s settings.</li>
</ul>
Example:
<pre><code>/**
 * Add custom checks on usernames.
 *
 * Specifically, prevent use of usernames ending in numbers.
 *
 * @param bool $valid True if the username is valid, false if not.
 * @param string $username The username.
 * @param array $options Plugin options.
 */
function my_restrict_usernames_check( $valid, $username, $options ) {
 // Only do additional checking if the plugin has already performed its
 // checks and deemed the username valid.
 if ( $valid ) {
 // Don't allow usernames to end in numbers.
 if ( preg_match( '/[0-9]+$/', $username ) ) {
 $valid = false;
 }
 }
 return $valid;
}
add_filter( 'c2c_restrict_usernames-validate', 'my_restrict_usernames_check', 10, 3 );
</code></pre>

Restrict Usernames

Restrict the usernames that new users may use when registering for your site.

theme funda

Restrict Payment Methods For WooCommerce lets you control which payment gateways appear at checkout using powerful, flexible conditions.
With this plugin, you can dynamically show or hide WooCommerce payment methods based on cart contents, user roles, shipping methods, dates, and more — ensuring customers only see suitable and secure payment options.
<h3>💡 Key Features</h3>
<ul>
<li>One-click installation and intuitive setup </li>
<li>Configure multiple restriction rules for payment gateways </li>
<li>Simple admin interface with grouped conditions </li>
<li>
Enable/disable payment gateways based on:
<ul>
<li>Order total (subtotal, quantity)</li>
<li>Products, product categories, tags, brands, types, stock status</li>
<li>Shipping method and shipping class</li>
<li>Billing and shipping fields (name, address, etc.)</li>
<li>User status (logged in/out), user role, or specific users</li>
<li>Date and day-of-week conditions</li>
</ul>
</li>
<li>
Supports multi-line and multi-select conditions
</li>
<li>Advanced matching logic for robust scenarios </li>
<li>Compatible with the latest WooCommerce versions</li>
</ul>
<h3>Examples</h3>
Here are several examples of how you can use Restrict Payment Methods For WooCommerce to control which gateways appear during checkout:
<ol>
<li>
Restrict PayPal for orders below $50
<ul>
<li>Show PayPal only if the cart subtotal is greater than or equal to $50. </li>
<li>Condition used: Cart total (subtotal).</li>
</ul>
</li>
<li>
Hide Cash on Delivery for orders over 10 items
<ul>
<li>Disable COD if the total cart quantity exceeds 10. </li>
<li>Condition used: Cart quantity.</li>
</ul>
</li>
<li>
Restrict Cash on Delivery for specific products
<ul>
<li>Hide Cash on Delivery if “Gift Card” or “Custom Order” product is in the cart. </li>
<li>Condition used: Specific products.</li>
</ul>
</li>
<li>
Hide Stripe for certain product categories
<ul>
<li>Do not show Stripe for items in “Digital Products” category. </li>
<li>Condition used: Product category.</li>
</ul>
</li>
<li>
Show PayPal only for products tagged “express”
<ul>
<li>Display PayPal only when the cart contains products tagged as “express”. </li>
<li>Condition used: Product tags.</li>
</ul>
</li>
<li>
Enable Bank Transfer for “Brand A” products only
<ul>
<li>Only allow Bank Transfer if all items belong to Brand A. </li>
<li>Condition used: Product brand.</li>
</ul>
</li>
<li>
Restrict certain payment methods for “Variable” product types
<ul>
<li>Hide “Cash on Delivery” if the cart has variable products. </li>
<li>Condition used: Product type.</li>
</ul>
</li>
<li>
Disable PayPal for out-of-stock products
<ul>
<li>Prevent checkout with PayPal if any product in the cart is out of stock. </li>
<li>Condition used: Product stock status.</li>
</ul>
</li>
<li>
Enable payment methods based on shipping method
<ul>
<li>Show “Cash on Delivery” only if “Local Pickup” or “Flat Rate” shipping is selected. </li>
<li>Condition used: Shipping method.</li>
</ul>
</li>
<li>
Restrict PayPal for certain shipping classes
<ul>
<li>Hide PayPal if any cart item belongs to “Heavy Item” shipping class. </li>
<li>Condition used: Shipping class.</li>
</ul>
</li>
<li>
Restrict gateways based on billing country
<ul>
<li>Allow PayPal only for customers with a billing country of “United States”. </li>
<li>Condition used: Billing field (country).</li>
</ul>
</li>
<li>
Hide certain gateways for specific shipping zones or cities
<ul>
<li>Disable Bank Transfer for shipping city “New York”. </li>
<li>Condition used: Shipping field (city).</li>
</ul>
</li>
<li>
Enable Bank Transfer only for logged-in users
<ul>
<li>Hide Bank Transfer for guests; show only to logged-in customers. </li>
<li>Condition used: User login status.</li>
</ul>
</li>
<li>
Allow Stripe for “shop_manager” and “administrator” roles only
<ul>
<li>Restrict Stripe to specific user roles. </li>
<li>Condition used: User role.</li>
</ul>
</li>
<li>
Restrict payment methods for specific users
<ul>
<li>Disable “Cash on Delivery” for a particular customer account. </li>
<li>Condition used: Specific user.</li>
</ul>
</li>
<li>
Show Stripe only on Mondays and Fridays
<ul>
<li>Display Stripe gateway only on those two days. </li>
<li>Condition used: Day-of-week condition.</li>
</ul>
</li>
<li>
Restrict PayPal for specific date ranges
<ul>
<li>Hide PayPal between Dec 25–Jan 1 (e.g., during holidays). </li>
<li>Condition used: Date range condition.</li>
</ul>
</li>
<li>
Allow multiple conditions in a single rule
<ul>
<li>Example: Show PayPal only if subtotal ≥ $50 AND user is logged in AND it’s Friday. </li>
<li>Condition used: Multi-condition and advanced matching logic.</li>
</ul>
</li>
<li>
Enable multiple payment rules at once
<ul>
<li>Example: Create separate rules for different countries, product categories, and user roles simultaneously. </li>
<li>Condition used: Multiple rules support.</li>
</ul>
</li>
<li>
Restrict based on shipping class and subtotal together
<ul>
<li>Hide PayPal for “Heavy Item” class unless subtotal is above $200. </li>
<li>Condition used: Combined conditions.</li>
</ul>
</li>
</ol>
Each example demonstrates how you can tailor checkout payment options to your exact business logic and improve the customer experience.
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Restrict Payment Methods For WooCommerce

Restrict WooCommerce payment gateways based on flexible conditions like products, totals, user roles, and more. Smarter, dynamic checkout control.

Restrict Usernames vs Restrict Payment Methods For WooCommerce