159 lines
5.0 KiB
PHP
159 lines
5.0 KiB
PHP
<?php
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/* vim: set expandtab sw=4 ts=4 sts=4: */
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/**
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* Functions for the table relation page
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*
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* @package PhpMyAdmin
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*/
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/**
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* Generate dropdown choices
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*
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* @param string $dropdown_question Message to display
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* @param string $select_name Name of the <select> field
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* @param array $choices Choices for dropdown
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* @param string $selected_value Selected value
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*
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* @return string The html code for existing value (for selected)
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*
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* @access public
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*/
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function PMA_generateDropdown(
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$dropdown_question, $select_name, $choices, $selected_value
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) {
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$html_output = htmlspecialchars($dropdown_question) . ' '
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. '<select name="' . htmlspecialchars($select_name) . '">' . "\n";
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foreach ($choices as $one_value => $one_label) {
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$html_output .= '<option value="' . htmlspecialchars($one_value) . '"';
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if ($selected_value == $one_value) {
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$html_output .= ' selected="selected" ';
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}
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$html_output .= '>' . htmlspecialchars($one_label) . '</option>' . "\n";
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}
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$html_output .= '</select>' . "\n";
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return $html_output;
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}
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/**
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* Split a string on backquote pairs
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*
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* @param string $text original string
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*
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* @return array containing the elements (and their surrounding backquotes)
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*
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* @access public
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*/
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function PMA_backquoteSplit($text)
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{
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$elements = array();
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$final_pos = strlen($text) - 1;
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$pos = 0;
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while ($pos <= $final_pos) {
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$first_backquote = strpos($text, '`', $pos);
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$second_backquote = strpos($text, '`', $first_backquote + 1);
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// after the second one, there might be another one which means
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// this is an escaped backquote
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if ($second_backquote < $final_pos && '`' == $text[$second_backquote + 1]) {
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$second_backquote = strpos($text, '`', $second_backquote + 2);
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}
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if (false === $first_backquote || false === $second_backquote) {
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break;
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}
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$elements[] = substr(
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$text, $first_backquote, $second_backquote - $first_backquote + 1
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);
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$pos = $second_backquote + 1;
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}
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return($elements);
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}
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/**
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* Returns the DROP query for a foreign key constraint
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*
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* @param string $table table of the foreign key
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* @param string $fk foreign key name
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*
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* @return string DROP query for the foreign key constraint
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*/
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function PMA_getSQLToDropForeignKey($table, $fk)
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{
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return 'ALTER TABLE ' . PMA_Util::backquote($table)
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. ' DROP FOREIGN KEY ' . PMA_Util::backquote($fk) . ';';
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}
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/**
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* Returns the SQL query for foreign key constraint creation
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*
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* @param string $table table name
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* @param string $field field name
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* @param string $foreignDb foreign database name
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* @param string $foreignTable foreign table name
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* @param string $foreignField foreign field name
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* @param string $name name of the constraint
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* @param string $onDelete on delete action
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* @param string $onUpdate on update action
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*
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* @return string SQL query for foreign key constraint creation
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*/
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function PMA_getSQLToCreateForeignKey($table, $field, $foreignDb, $foreignTable,
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$foreignField, $name = null, $onDelete = null, $onUpdate = null
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) {
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$sql_query = 'ALTER TABLE ' . PMA_Util::backquote($table) . ' ADD ';
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// if user entered a constraint name
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if (! empty($name)) {
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$sql_query .= ' CONSTRAINT ' . PMA_Util::backquote($name);
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}
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$sql_query .= ' FOREIGN KEY (' . PMA_Util::backquote($field) . ')'
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. ' REFERENCES ' . PMA_Util::backquote($foreignDb)
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. '.' . PMA_Util::backquote($foreignTable)
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. '(' . PMA_Util::backquote($foreignField) . ')';
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if (! empty($onDelete)) {
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$sql_query .= ' ON DELETE ' . $onDelete;
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}
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if (! empty($onUpdate)) {
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$sql_query .= ' ON UPDATE ' . $onUpdate;
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}
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$sql_query .= ';';
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return $sql_query;
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}
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/**
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* Creates and populates dropdowns to select foreign db/table/column
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*
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* @param string $name name of the dropdowns
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* @param array $values dropdown values
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* @param string $foreign value of the item to be selected
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* @param string $title title to show on hovering the dropdown
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*
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* @return string HTML for the dropdown
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*/
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function PMA_generateRelationalDropdown(
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$name, $values = array(), $foreign = false, $title = ''
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) {
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$html_output = '<select name="' . $name . '" title="' . $title . '">';
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$html_output .= '<option value=""></option>';
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$seen_key = false;
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foreach ($values as $value) {
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$html_output .= '<option value="' . htmlspecialchars($value) . '"';
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if ($foreign && $value == $foreign) {
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$html_output .= ' selected="selected"';
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$seen_key = true;
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}
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$html_output .= '>' . htmlspecialchars($value) . '</option>';
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}
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if ($foreign && ! $seen_key) {
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$html_output .= '<option value="' . htmlspecialchars($foreign) . '"'
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. ' selected="selected">' . htmlspecialchars($foreign) . '</option>';
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}
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$html_output .= '</select>';
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return $html_output;
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}
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?>
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