Code Duplication    Length = 3-7 lines in 4 locations

wp-admin/includes/user.php 1 location

@@ 154-156 (lines=3) @@
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	/** This filter is documented in wp-includes/user.php */
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	$illegal_logins = (array) apply_filters( 'illegal_user_logins', array() );
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	if ( in_array( strtolower( $user->user_login ), array_map( 'strtolower', $illegal_logins ) ) ) {
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		$errors->add( 'invalid_username', __( '<strong>ERROR</strong>: Sorry, that username is not allowed.' ) );
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	}
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	/* checking email address */
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	if ( empty( $user->user_email ) ) {

wp-includes/ms-functions.php 1 location

@@ 440-442 (lines=3) @@
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	/** This filter is documented in wp-includes/user.php */
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	$illegal_logins = (array) apply_filters( 'illegal_user_logins', array() );
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	if ( in_array( strtolower( $user_name ), array_map( 'strtolower', $illegal_logins ) ) ) {
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		$errors->add( 'user_name',  __( 'Sorry, that username is not allowed.' ) );
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	}
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	if ( is_email_address_unsafe( $user_email ) )
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		$errors->add('user_email',  __('You cannot use that email address to signup. We are having problems with them blocking some of our email. Please use another email provider.'));

wp-includes/user.php 2 locations

@@ 1450-1452 (lines=3) @@
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	 */
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	$illegal_logins = (array) apply_filters( 'illegal_user_logins', array() );
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	if ( in_array( strtolower( $user_login ), array_map( 'strtolower', $illegal_logins ) ) ) {
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		return new WP_Error( 'invalid_username', __( 'Sorry, that username is not allowed.' ) );
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	}
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	/*
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	 * If a nicename is provided, remove unsafe user characters before using it.
@@ 2262-2268 (lines=7) @@
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	} elseif ( username_exists( $sanitized_user_login ) ) {
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		$errors->add( 'username_exists', __( '<strong>ERROR</strong>: This username is already registered. Please choose another one.' ) );
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	} else {
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		/** This filter is documented in wp-includes/user.php */
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		$illegal_user_logins = array_map( 'strtolower', (array) apply_filters( 'illegal_user_logins', array() ) );
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		if ( in_array( strtolower( $sanitized_user_login ), $illegal_user_logins ) ) {
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			$errors->add( 'invalid_username', __( '<strong>ERROR</strong>: Sorry, that username is not allowed.' ) );
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		}
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	}
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	// Check the email address
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	if ( $user_email == '' ) {