guid

JCB! Validation Rule

guid

Globally Unique Identifier

Code

	/**
	 * Method to test for a Globally Unique Identifier.
	 *
	 * @param   \SimpleXMLElement  $element  The SimpleXMLElement object representing the `<field>` tag for the form field object.
	 * @param   mixed              $value    The form field value to validate.
	 * @param   string             $group    The field name group control value. This acts as an array container for the field.
	 *                                       For example if the field has name="foo" and the group value is set to "bar" then the
	 *                                       full field name would end up being "bar[foo]".
	 * @param   Registry           $input    An optional Registry object with the entire data set to validate against the entire form.
	 * @param   Form               $form     The form object for which the field is being tested.
	 *
	 * @return  boolean  True if the value is valid, false otherwise.
	 *
	 */
	public function test(\SimpleXMLElement $element, $value, $group = null, ?Registry $input = null, ?Form $form = null)
	{
		$value = trim($value);

		// If the field is empty and not required, the field is valid.
		$required = ((string) $element['required'] == 'true' || (string) $element['required'] == 'required');

		if (!$required && empty($value))
		{
			return true;
		}

		// thanks to Lewie https://stackoverflow.com/a/1515456/1429677
		return preg_match("/^(\{)?[a-f\d]{8}(-[a-f\d]{4}){4}[a-f\d]{8}(?(1)\})$/i", $value);
	}

Add clean, self-contained validation rule into your component fields with this reusable rule designed for seamless integration and easy updates in JCB.

Used in Joomla Component Builder - Source - Mirror - Download

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