166 lines
4.5 KiB
PHP
166 lines
4.5 KiB
PHP
<?php
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/*
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----------------------------------------------------------------------
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LICENSE
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License (GPL)
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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To read the license please visit http://www.gnu.org/copyleft/gpl.html
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----------------------------------------------------------------------
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*/
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/**
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* Persistent variable table
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*
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* @author Drupal Developpement Team
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* @link http://cvs.drupal.org/viewcvs/drupal/drupal/includes/bootstrap.inc?rev=1.38&view=auto
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*/
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/**
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* Load the persistent variable table.
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*
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* The variable table is composed of values that have been saved in the table
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* with variable_set() as well as those explicitly specified in the configuration
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* file.
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*/
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function variable_init($conf = array()) {
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global $db;
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$result = $db->query('SELECT * FROM `variable`');
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$variables=array();
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while ($db->next_record($result)) {
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/* maybe the data is *not* serialized, in that case, take it verbatim */
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$variable = $db->Record;
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if (($variables[$variable['name']] = @unserialize($variable['value'])) === FALSE) {
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$variables[$variable['name']] = $variable['value'];
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}
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}
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foreach ($conf as $name => $value) {
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$variables[$name] = $value;
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}
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return $variables;
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}
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/**
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* Initialize the global $conf array if necessary
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*
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* @global $conf the global conf array
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* @uses variable_init()
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*/
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function variable_init_maybe() {
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global $conf;
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if (!isset($conf)) {
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$conf = variable_init();
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}
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}
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/**
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* Return a persistent variable.
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*
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* @param $name
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* The name of the variable to return.
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* @param $default
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* The default value to use if this variable has never been set.
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* @param $createit_comment
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* If variable doesn't exist, create it with the default value
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* and createit_comment value as comment
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* @return
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* The value of the variable.
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* @global $conf
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* A cache of the configuration.
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*/
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function variable_get($name, $default = null, $createit_comment = null) {
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global $conf;
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variable_init_maybe();
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if (isset($conf[$name])) {
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return $conf[$name];
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} elseif (!is_null($createit_comment)) {
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variable_set($name, $default, $createit_comment);
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}
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return $default;
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}
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/**
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* Set a persistent variable.
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*
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* @param $name
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* The name of the variable to set.
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* @param $value
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* The value to set. This can be any PHP data type; these functions take care
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* of serialization as necessary.
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*/
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function variable_set($name, $value, $comment = null) {
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global $conf, $db, $msg, $hooks;
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$msg->log('variable', 'variable_set', '+' . serialize($value) . '+' . $comment . '+');
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variable_init_maybe();
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if (is_object($value) || is_array($value)) {
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$value2 = serialize($value);
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} else {
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$value2 = $value;
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}
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if (array_key_exists($name, $conf)) {
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$previous = $conf[$name];
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} else {
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$previous = null;
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}
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if (!array_key_exists($name, $conf) || $value != $conf[$name]) {
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$conf[$name] = $value;
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if (empty($comment)) {
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$query = "INSERT INTO variable (name, value) values ( ?, ?) on duplicate key update name= ?, value= ? ;";
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$query_args = array($name, $value2, $name, $value2);
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} else {
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$query = "INSERT INTO variable (name, value, comment) values ( ?, ?, ?) on duplicate key update name= ?, value= ?, comment= ? ;";
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$query_args = array($name, $value2, $comment, $name, $value2, $comment);
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}
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$db->query($query, $query_args);
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$hooks->invoke("hook_variable_set", array("name" => $name, "old" => $previous, "new" => $value));
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}
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}
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/**
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* Unset a persistent variable.
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*
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* @param $name
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* The name of the variable to undefine.
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*/
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function variable_del($name) {
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global $conf, $db;
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$db->query("DELETE FROM `variable` WHERE name = ?;", array($name));
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unset($conf[$name]);
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}
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/**
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* List all variables
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*/
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function variables_list() {
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global $db;
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$t = array();
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$db->query("SELECT * FROM `variable` WHERE `comment` IS NOT NULL ORDER BY `name`");
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while ($db->next_record()) {
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$t[] = $db->Record;
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}
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return $t;
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}
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