field
* @param array $choices Choices for dropdown
* @param string $selected_value Selected value
*
* @return string The html code for existing value (for selected)
*
* @access public
*/
function PMA_generateDropdown(
$dropdown_question, $select_name, $choices, $selected_value
) {
$html_output = htmlspecialchars($dropdown_question) . ' '
. '' . "\n";
return $html_output;
}
/**
* Split a string on backquote pairs
*
* @param string $text original string
*
* @return array containing the elements (and their surrounding backquotes)
*
* @access public
*/
function PMA_backquoteSplit($text)
{
$elements = array();
$final_pos = strlen($text) - 1;
$pos = 0;
while ($pos <= $final_pos) {
$first_backquote = strpos($text, '`', $pos);
$second_backquote = strpos($text, '`', $first_backquote + 1);
// after the second one, there might be another one which means
// this is an escaped backquote
if ($second_backquote < $final_pos && '`' == $text[$second_backquote + 1]) {
$second_backquote = strpos($text, '`', $second_backquote + 2);
}
if (false === $first_backquote || false === $second_backquote) {
break;
}
$elements[] = substr(
$text, $first_backquote, $second_backquote - $first_backquote + 1
);
$pos = $second_backquote + 1;
}
return($elements);
}
/**
* Returns the DROP query for a foreign key constraint
*
* @param string $table table of the foreign key
* @param string $fk foreign key name
*
* @return string DROP query for the foreign key constraint
*/
function PMA_getSQLToDropForeignKey($table, $fk)
{
return 'ALTER TABLE ' . PMA_Util::backquote($table)
. ' DROP FOREIGN KEY ' . PMA_Util::backquote($fk) . ';';
}
/**
* Returns the SQL query for foreign key constraint creation
*
* @param string $table table name
* @param string $field field name
* @param string $foreignDb foreign database name
* @param string $foreignTable foreign table name
* @param string $foreignField foreign field name
* @param string $name name of the constraint
* @param string $onDelete on delete action
* @param string $onUpdate on update action
*
* @return string SQL query for foreign key constraint creation
*/
function PMA_getSQLToCreateForeignKey($table, $field, $foreignDb, $foreignTable,
$foreignField, $name = null, $onDelete = null, $onUpdate = null
) {
$sql_query = 'ALTER TABLE ' . PMA_Util::backquote($table) . ' ADD ';
// if user entered a constraint name
if (! empty($name)) {
$sql_query .= ' CONSTRAINT ' . PMA_Util::backquote($name);
}
$sql_query .= ' FOREIGN KEY (' . PMA_Util::backquote($field) . ')'
. ' REFERENCES ' . PMA_Util::backquote($foreignDb)
. '.' . PMA_Util::backquote($foreignTable)
. '(' . PMA_Util::backquote($foreignField) . ')';
if (! empty($onDelete)) {
$sql_query .= ' ON DELETE ' . $onDelete;
}
if (! empty($onUpdate)) {
$sql_query .= ' ON UPDATE ' . $onUpdate;
}
$sql_query .= ';';
return $sql_query;
}
/**
* Creates and populates dropdowns to select foreign db/table/column
*
* @param string $name name of the dropdowns
* @param array $values dropdown values
* @param string $foreign value of the item to be selected
* @param string $title title to show on hovering the dropdown
*
* @return string HTML for the dropdown
*/
function PMA_generateRelationalDropdown(
$name, $values = array(), $foreign = false, $title = ''
) {
$html_output = '';
return $html_output;
}
?>