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* hold the PMA_List base class
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* @since phpMyAdmin 2.9.10
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/* abstract public */ class PMA_List
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* @var array the list items
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* @var array details for list items
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var $details = array();
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* @var bool whether we need to re-index the database list for consistency keys
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var $_need_to_reindex = false;
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* @var mixed empty item
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* returns first item from list
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* @uses PMA_List::$items to get first item
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* @uses reset() to retrive first item from PMA_List::$items array
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* @return string value of first item
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return reset($this->items);
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* returns item only if there is only one in the list
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* @uses PMA_List::count() to decide what to return
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* @uses PMA_List::getFirst() to return it
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* @uses PMA_List::getEmpty() to return it
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function getSingleItem()
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if ($this->count() === 1) {
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return $this->getFirst();
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return $this->getEmpty();
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* returns list item count
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* @uses PMA_List::$items to count it items
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* @uses count() to count items in PMA_List::$items
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* @return integer PMA_List::$items count
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return count($this->items);
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* defines what is an empty item (0, '', false or null)
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* @uses PMA_List::$item_empty as return value
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* @return mixed an empty item
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return $this->item_empty;
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* checks if the given db names exists in the current list, if there is
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* missing at least one item it reutrns false other wise true
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* @uses PMA_List::$items to check for existence of specific item
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* @uses func_get_args()
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* @uses in_array() to check if given arguments exists in PMA_List::$items
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* @param string $db_name,.. one or more mysql result resources
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* @return boolean true if all items exists, otheriwse false
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foreach (func_get_args() as $result) {
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if (! in_array($result, $this->items)) {
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* returns HTML <option>-tags to be used inside <select></select>
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* @uses PMA_List::$items to build up the option items
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* @uses PMA_List::getDefault() to mark this as sleected if requested
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* @uses htmlspecialchars() to escape items
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* @param mixed $selected the selected db or true for selecting current db
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* @return string HTML option tags
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function getHtmlOptions($selected = '')
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if (true === $selected) {
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$selected = $this->getDefault();
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foreach ($this->items as $each_db) {
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$options .= '<option value="' . htmlspecialchars($each_db) . '"';
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if ($selected === $each_db) {
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$options .= ' selected="selected"';
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$options .= '>' . htmlspecialchars($each_db) . '</option>' . "\n";
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* returns default item
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* @uses PMA_List::getEmpty() as fallback
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* @return string default item
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function getDefault()
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return $this->getEmpty();
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/* abstract public */ function build() {}
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