checking multiple fields for uniqueness

gistfile1.php

function checkMultipleUnique ($data, $fields) {
	if (!is_array($fields)) {
		$fields = array($fields);
	}
	foreach($fields as $key) {
		$tmp[$key] = $this->data[$this->name][$key];
	}
	if (isset($this->data[$this->name][$this->primaryKey])) {
		$tmp[$this->primaryKey] = "<>".$this->data[$this->name][$this->primaryKey];
	}
	return $this->isUnique($tmp, false);
}