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validate_username › WordPress Function

Since2.0.1
Deprecatedn/a
› validate_username ( $username )
Parameters:
  • (string) $username Username.
    Required: Yes
Returns:
  • (bool) Whether username given is valid.
Defined at:
Codex:
Change Log:
  • 4.4.0

Checks whether a username is valid.



Related Functions: validate_user_form, validate_user_signup, validate_current_theme, validate_email, validate_plugin

Source 

function validate_username( $username ) {
	$sanitized = sanitize_user( $username, true );
	$valid     = ( $sanitized === $username && ! empty( $sanitized ) );

	/**
	 * Filters whether the provided username is valid.
	 *
	 * @since 2.0.1
	 *
	 * @param bool   $valid    Whether given username is valid.
	 * @param string $username Username to check.
	 */
	return apply_filters( 'validate_username', $valid, $username );
}