Friendica Communications Platform (please note that this is a clone of the repository at github, issues are handled there) https://friendi.ca
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<?php
use \Friendica\Core\System;
use Friendica\Database\DBM;
require_once('include/datetime.php');
/**
* @class MySQL database class
*
* This class is for the low level database stuff that does driver specific things.
*/
class dba {
public static $connected = true;
private static $_server_info = '';
private static $db;
private static $driver;
private static $error = false;
private static $errorno = 0;
private static $affected_rows = 0;
private static $in_transaction = false;
private static $relation = array();
public static function connect($serveraddr, $user, $pass, $db, $install = false) {
if (!is_null(self::$db)) {
return true;
}
$a = get_app();
$stamp1 = microtime(true);
$serveraddr = trim($serveraddr);
$serverdata = explode(':', $serveraddr);
$server = $serverdata[0];
if (count($serverdata) > 1) {
$port = trim($serverdata[1]);
}
$server = trim($server);
$user = trim($user);
$pass = trim($pass);
$db = trim($db);
if (!(strlen($server) && strlen($user))) {
self::$connected = false;
self::$db = null;
return false;
}
if ($install) {
if (strlen($server) && ($server !== 'localhost') && ($server !== '127.0.0.1')) {
if (! dns_get_record($server, DNS_A + DNS_CNAME + DNS_PTR)) {
self::$error = sprintf(t('Cannot locate DNS info for database server \'%s\''), $server);
self::$connected = false;
self::$db = null;
return false;
}
}
}
if (class_exists('\PDO') && in_array('mysql', PDO::getAvailableDrivers())) {
self::$driver = 'pdo';
$connect = "mysql:host=".$server.";dbname=".$db;
if (isset($port)) {
$connect .= ";port=".$port;
}
if (isset($a->config["system"]["db_charset"])) {
$connect .= ";charset=".$a->config["system"]["db_charset"];
}
try {
self::$db = @new PDO($connect, $user, $pass);
self::$connected = true;
} catch (PDOException $e) {
self::$connected = false;
}
}
if (!self::$connected && class_exists('mysqli')) {
self::$driver = 'mysqli';
self::$db = @new mysqli($server, $user, $pass, $db, $port);
if (!mysqli_connect_errno()) {
self::$connected = true;
if (isset($a->config["system"]["db_charset"])) {
self::$db->set_charset($a->config["system"]["db_charset"]);
}
}
}
if (!self::$connected && function_exists('mysql_connect')) {
self::$driver = 'mysql';
self::$db = mysql_connect($serveraddr, $user, $pass);
if (self::$db && mysql_select_db($db, self::$db)) {
self::$connected = true;
if (isset($a->config["system"]["db_charset"])) {
mysql_set_charset($a->config["system"]["db_charset"], self::$db);
}
}
}
// No suitable SQL driver was found.
if (!self::$connected) {
self::$db = null;
if (!$install) {
system_unavailable();
}
}
$a->save_timestamp($stamp1, "network");
return true;
}
/**
* @brief Returns the MySQL server version string
*
* This function discriminate between the deprecated mysql API and the current
* object-oriented mysqli API. Example of returned string: 5.5.46-0+deb8u1
*
* @return string
*/
public static function server_info() {
if (self::$_server_info == '') {
switch (self::$driver) {
case 'pdo':
self::$_server_info = self::$db->getAttribute(PDO::ATTR_SERVER_VERSION);
break;
case 'mysqli':
self::$_server_info = self::$db->server_info;
break;
case 'mysql':
self::$_server_info = mysql_get_server_info(self::$db);
break;
}
}
return self::$_server_info;
}
/**
* @brief Returns the selected database name
*
* @return string
*/
public static function database_name() {
$ret = self::p("SELECT DATABASE() AS `db`");
$data = self::inArray($ret);
return $data[0]['db'];
}
/**
* @brief Analyze a database query and log this if some conditions are met.
*
* @param string $query The database query that will be analyzed
*/
private static function log_index($query) {
$a = get_app();
if (empty($a->config["system"]["db_log_index"])) {
return;
}
// Don't explain an explain statement
if (strtolower(substr($query, 0, 7)) == "explain") {
return;
}
// Only do the explain on "select", "update" and "delete"
if (!in_array(strtolower(substr($query, 0, 6)), array("select", "update", "delete"))) {
return;
}
$r = self::p("EXPLAIN ".$query);
if (!DBM::is_result($r)) {
return;
}
$watchlist = explode(',', $a->config["system"]["db_log_index_watch"]);
$blacklist = explode(',', $a->config["system"]["db_log_index_blacklist"]);
while ($row = dba::fetch($r)) {
if ((intval($a->config["system"]["db_loglimit_index"]) > 0)) {
$log = (in_array($row['key'], $watchlist) &&
($row['rows'] >= intval($a->config["system"]["db_loglimit_index"])));
} else {
$log = false;
}
if ((intval($a->config["system"]["db_loglimit_index_high"]) > 0) && ($row['rows'] >= intval($a->config["system"]["db_loglimit_index_high"]))) {
$log = true;
}
if (in_array($row['key'], $blacklist) || ($row['key'] == "")) {
$log = false;
}
if ($log) {
$backtrace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
@file_put_contents($a->config["system"]["db_log_index"], datetime_convert()."\t".
$row['key']."\t".$row['rows']."\t".$row['Extra']."\t".
basename($backtrace[1]["file"])."\t".
$backtrace[1]["line"]."\t".$backtrace[2]["function"]."\t".
substr($query, 0, 2000)."\n", FILE_APPEND);
}
}
}
public static function escape($str) {
switch (self::$driver) {
case 'pdo':
return substr(@self::$db->quote($str, PDO::PARAM_STR), 1, -1);
case 'mysqli':
return @self::$db->real_escape_string($str);
case 'mysql':
return @mysql_real_escape_string($str,self::$db);
}
}
public static function connected() {
$connected = false;
switch (self::$driver) {
case 'pdo':
$r = dba::p("SELECT 1");
if (DBM::is_result($r)) {
$row = dba::inArray($r);
$connected = ($row[0]['1'] == '1');
}
break;
case 'mysqli':
$connected = self::$db->ping();
break;
case 'mysql':
$connected = mysql_ping(self::$db);
break;
}
return $connected;
}
/**
* @brief Replaces ANY_VALUE() function by MIN() function,
* if the database server does not support ANY_VALUE().
*
* Considerations for Standard SQL, or MySQL with ONLY_FULL_GROUP_BY (default since 5.7.5).
* ANY_VALUE() is available from MySQL 5.7.5 https://dev.mysql.com/doc/refman/5.7/en/miscellaneous-functions.html
* A standard fall-back is to use MIN().
*
* @param string $sql An SQL string without the values
* @return string The input SQL string modified if necessary.
*/
public static function any_value_fallback($sql) {
$server_info = self::server_info();
if (version_compare($server_info, '5.7.5', '<') ||
(stripos($server_info, 'MariaDB') !== false)) {
$sql = str_ireplace('ANY_VALUE(', 'MIN(', $sql);
}
return $sql;
}
/**
* @brief beautifies the query - useful for "SHOW PROCESSLIST"
*
* This is safe when we bind the parameters later.
* The parameter values aren't part of the SQL.
*
* @param string $sql An SQL string without the values
* @return string The input SQL string modified if necessary.
*/
public static function clean_query($sql) {
$search = array("\t", "\n", "\r", " ");
$replace = array(' ', ' ', ' ', ' ');
do {
$oldsql = $sql;
$sql = str_replace($search, $replace, $sql);
} while ($oldsql != $sql);
return $sql;
}
/**
* @brief Replaces the ? placeholders with the parameters in the $args array
*
* @param string $sql SQL query
* @param array $args The parameters that are to replace the ? placeholders
* @return string The replaced SQL query
*/
private static function replace_parameters($sql, $args) {
$offset = 0;
foreach ($args AS $param => $value) {
if (is_int($args[$param]) || is_float($args[$param])) {
$replace = intval($args[$param]);
} else {
$replace = "'".self::escape($args[$param])."'";
}
$pos = strpos($sql, '?', $offset);
if ($pos !== false) {
$sql = substr_replace($sql, $replace, $pos, 1);
}
$offset = $pos + strlen($replace);
}
return $sql;
}
/**
* @brief Convert parameter array to an universal form
* @param array $args Parameter array
* @return array universalized parameter array
*/
private static function getParam($args) {
unset($args[0]);
// When the second function parameter is an array then use this as the parameter array
if ((count($args) > 0) && (is_array($args[1]))) {
return $args[1];
} else {
return $args;
}
}
/**
* @brief Executes a prepared statement that returns data
* @usage Example: $r = p("SELECT * FROM `item` WHERE `guid` = ?", $guid);
*
* Please only use it with complicated queries.
* For all regular queries please use dba::select or dba::exists
*
* @param string $sql SQL statement
* @return object statement object
*/
public static function p($sql) {
$a = get_app();
$stamp1 = microtime(true);
$params = self::getParam(func_get_args());
// Renumber the array keys to be sure that they fit
$i = 0;
$args = array();
foreach ($params AS $param) {
// Avoid problems with some MySQL servers and boolean values. See issue #3645
if (is_bool($param)) {
$param = (int)$param;
}
$args[++$i] = $param;
}
if (!self::$connected) {
return false;
}
if ((substr_count($sql, '?') != count($args)) && (count($args) > 0)) {
// Question: Should we continue or stop the query here?
logger('Parameter mismatch. Query "'.$sql.'" - Parameters '.print_r($args, true), LOGGER_DEBUG);
}
$sql = self::clean_query($sql);
$sql = self::any_value_fallback($sql);
$orig_sql = $sql;
if (x($a->config,'system') && x($a->config['system'], 'db_callstack')) {
$sql = "/*".System::callstack()." */ ".$sql;
}
self::$error = '';
self::$errorno = 0;
self::$affected_rows = 0;
// We have to make some things different if this function is called from "e"
$trace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 2);
if (isset($trace[1])) {
$called_from = $trace[1];
} else {
// We use just something that is defined to avoid warnings
$called_from = $trace[0];
}
// We are having an own error logging in the function "e"
$called_from_e = ($called_from['function'] == 'e');
switch (self::$driver) {
case 'pdo':
// If there are no arguments we use "query"
if (count($args) == 0) {
if (!$retval = self::$db->query($sql)) {
$errorInfo = self::$db->errorInfo();
self::$error = $errorInfo[2];
self::$errorno = $errorInfo[1];
$retval = false;
break;
}
self::$affected_rows = $retval->rowCount();
break;
}
if (!$stmt = self::$db->prepare($sql)) {
$errorInfo = self::$db->errorInfo();
self::$error = $errorInfo[2];
self::$errorno = $errorInfo[1];
$retval = false;
break;
}
foreach ($args AS $param => $value) {
$stmt->bindParam($param, $args[$param]);
}
if (!$stmt->execute()) {
$errorInfo = $stmt->errorInfo();
self::$error = $errorInfo[2];
self::$errorno = $errorInfo[1];
$retval = false;
} else {
$retval = $stmt;
self::$affected_rows = $retval->rowCount();
}
break;
case 'mysqli':
// There are SQL statements that cannot be executed with a prepared statement
$parts = explode(' ', $orig_sql);
$command = strtolower($parts[0]);
$can_be_prepared = in_array($command, array('select', 'update', 'insert', 'delete'));
// The fallback routine is called as well when there are no arguments
if (!$can_be_prepared || (count($args) == 0)) {
$retval = self::$db->query(self::replace_parameters($sql, $args));
if (self::$db->errno) {
self::$error = self::$db->error;
self::$errorno = self::$db->errno;
$retval = false;
} else {
if (isset($retval->num_rows)) {
self::$affected_rows = $retval->num_rows;
} else {
self::$affected_rows = self::$db->affected_rows;
}
}
break;
}
$stmt = self::$db->stmt_init();
if (!$stmt->prepare($sql)) {
self::$error = $stmt->error;
self::$errorno = $stmt->errno;
$retval = false;
break;
}
$params = '';
$values = array();
foreach ($args AS $param => $value) {
if (is_int($args[$param])) {
$params .= 'i';
} elseif (is_float($args[$param])) {
$params .= 'd';
} elseif (is_string($args[$param])) {
$params .= 's';
} else {
$params .= 'b';
}
$values[] = &$args[$param];
}
if (count($values) > 0) {
array_unshift($values, $params);
call_user_func_array(array($stmt, 'bind_param'), $values);
}
if (!$stmt->execute()) {
self::$error = self::$db->error;
self::$errorno = self::$db->errno;
$retval = false;
} else {
$stmt->store_result();
$retval = $stmt;
self::$affected_rows = $retval->affected_rows;
}
break;
case 'mysql':
// For the old "mysql" functions we cannot use prepared statements
$retval = mysql_query(self::replace_parameters($sql, $args), self::$db);
if (mysql_errno(self::$db)) {
self::$error = mysql_error(self::$db);
self::$errorno = mysql_errno(self::$db);
} else {
self::$affected_rows = mysql_affected_rows($retval);
// Due to missing mysql_* support this here wasn't tested at all
// See here: http://php.net/manual/en/function.mysql-num-rows.php
if (self::$affected_rows <= 0) {
self::$affected_rows = mysql_num_rows($retval);
}
}
break;
}
// We are having an own error logging in the function "e"
if ((self::$errorno != 0) && !$called_from_e) {
// We have to preserve the error code, somewhere in the logging it get lost
$error = self::$error;
$errorno = self::$errorno;
logger('DB Error '.self::$errorno.': '.self::$error."\n".
System::callstack(8)."\n".self::replace_parameters($sql, $params));
self::$error = $error;
self::$errorno = $errorno;
}
$a->save_timestamp($stamp1, 'database');
if (x($a->config,'system') && x($a->config['system'], 'db_log')) {
$stamp2 = microtime(true);
$duration = (float)($stamp2 - $stamp1);
if (($duration > $a->config["system"]["db_loglimit"])) {
$duration = round($duration, 3);
$backtrace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
@file_put_contents($a->config["system"]["db_log"], datetime_convert()."\t".$duration."\t".
basename($backtrace[1]["file"])."\t".
$backtrace[1]["line"]."\t".$backtrace[2]["function"]."\t".
substr(self::replace_parameters($sql, $args), 0, 2000)."\n", FILE_APPEND);
}
}
return $retval;
}
/**
* @brief Executes a prepared statement like UPDATE or INSERT that doesn't return data
*
* Please use dba::delete, dba::insert, dba::update, ... instead
*
* @param string $sql SQL statement
* @return boolean Was the query successfull? False is returned only if an error occurred
*/
public static function e($sql) {
$a = get_app();
$stamp = microtime(true);
$params = self::getParam(func_get_args());
// In a case of a deadlock we are repeating the query 20 times
$timeout = 20;
do {
$stmt = self::p($sql, $params);
if (is_bool($stmt)) {
$retval = $stmt;
} elseif (is_object($stmt)) {
$retval = true;
} else {
$retval = false;
}
self::close($stmt);
} while ((self::$errorno == 1213) && (--$timeout > 0));
if (self::$errorno != 0) {
// We have to preserve the error code, somewhere in the logging it get lost
$error = self::$error;
$errorno = self::$errorno;
logger('DB Error '.self::$errorno.': '.self::$error."\n".
System::callstack(8)."\n".self::replace_parameters($sql, $params));
self::$error = $error;
self::$errorno = $errorno;
}
$a->save_timestamp($stamp, "database_write");
return $retval;
}
/**
* @brief Check if data exists
*
* @param string $table Table name
* @param array $condition array of fields for condition
*
* @return boolean Are there rows for that condition?
*/
public static function exists($table, $condition) {
if (empty($table)) {
return false;
}
$fields = array();
$array_element = each($condition);
$array_key = $array_element['key'];
if (!is_int($array_key)) {
$fields = array($array_key);
}
$stmt = self::select($table, $fields, $condition, array('limit' => 1, 'only_query' => true));
if (is_bool($stmt)) {
$retval = $stmt;
} else {
$retval = (self::num_rows($stmt) > 0);
}
self::close($stmt);
return $retval;
}
/**
* @brief Fetches the first row
*
* Please use dba::select or dba::exists whenever this is possible.
*
* @param string $sql SQL statement
* @return array first row of query
*/
public static function fetch_first($sql) {
$params = self::getParam(func_get_args());
$stmt = self::p($sql, $params);
if (is_bool($stmt)) {
$retval = $stmt;
} else {
$retval = self::fetch($stmt);
}
self::close($stmt);
return $retval;
}
/**
* @brief Returns the number of affected rows of the last statement
*
* @return int Number of rows
*/
public static function affected_rows() {
return self::$affected_rows;
}
/**
* @brief Returns the number of columns of a statement
*
* @param object Statement object
* @return int Number of columns
*/
public static function columnCount($stmt) {
if (!is_object($stmt)) {
return 0;
}
switch (self::$driver) {
case 'pdo':
return $stmt->columnCount();
case 'mysqli':
return $stmt->field_count;
case 'mysql':
return mysql_affected_rows($stmt);
}
return 0;
}
/**
* @brief Returns the number of rows of a statement
*
* @param object Statement object
* @return int Number of rows
*/
public static function num_rows($stmt) {
if (!is_object($stmt)) {
return 0;
}
switch (self::$driver) {
case 'pdo':
return $stmt->rowCount();
case 'mysqli':
return $stmt->num_rows;
case 'mysql':
return mysql_num_rows($stmt);
}
return 0;
}
/**
* @brief Fetch a single row
*
* @param object $stmt statement object
* @return array current row
*/
public static function fetch($stmt) {
if (!is_object($stmt)) {
return false;
}
switch (self::$driver) {
case 'pdo':
return $stmt->fetch(PDO::FETCH_ASSOC);
case 'mysqli':
if (get_class($stmt) == 'mysqli_result') {
return $stmt->fetch_assoc();
}
// This code works, but is slow
// Bind the result to a result array
$cols = array();
$cols_num = array();
for ($x = 0; $x < $stmt->field_count; $x++) {
$cols[] = &$cols_num[$x];
}
call_user_func_array(array($stmt, 'bind_result'), $cols);
if (!$stmt->fetch()) {
return false;
}
// The slow part:
// We need to get the field names for the array keys
// It seems that there is no better way to do this.
$result = $stmt->result_metadata();
$fields = $result->fetch_fields();
$columns = array();
foreach ($cols_num AS $param => $col) {
$columns[$fields[$param]->name] = $col;
}
return $columns;
case 'mysql':
return mysql_fetch_array($stmt, MYSQL_ASSOC);
}
}
/**
* @brief Insert a row into a table
*
* @param string $table Table name
* @param array $param parameter array
* @param bool $on_duplicate_update Do an update on a duplicate entry
*
* @return boolean was the insert successfull?
*/
public static function insert($table, $param, $on_duplicate_update = false) {
$sql = "INSERT INTO `".self::escape($table)."` (`".implode("`, `", array_keys($param))."`) VALUES (".
substr(str_repeat("?, ", count($param)), 0, -2).")";
if ($on_duplicate_update) {
$sql .= " ON DUPLICATE KEY UPDATE `".implode("` = ?, `", array_keys($param))."` = ?";
$values = array_values($param);
$param = array_merge_recursive($values, $values);
}
return self::e($sql, $param);
}
/**
* @brief Fetch the id of the last insert command
*
* @return integer Last inserted id
*/
public static function lastInsertId() {
switch (self::$driver) {
case 'pdo':
$id = self::$db->lastInsertId();
break;
case 'mysqli':
$id = self::$db->insert_id;
break;
case 'mysql':
$id = mysql_insert_id(self::$db);
break;
}
return $id;
}
/**
* @brief Locks a table for exclusive write access
*
* This function can be extended in the future to accept a table array as well.
*
* @param string $table Table name
*
* @return boolean was the lock successful?
*/
public static function lock($table) {
// See here: https://dev.mysql.com/doc/refman/5.7/en/lock-tables-and-transactions.html
self::e("SET autocommit=0");
$success = self::e("LOCK TABLES `".self::escape($table)."` WRITE");
if (!$success) {
self::e("SET autocommit=1");
} else {
self::$in_transaction = true;
}
return $success;
}
/**
* @brief Unlocks all locked tables
*
* @return boolean was the unlock successful?
*/
public static function unlock() {
// See here: https://dev.mysql.com/doc/refman/5.7/en/lock-tables-and-transactions.html
self::e("COMMIT");
$success = self::e("UNLOCK TABLES");
self::e("SET autocommit=1");
self::$in_transaction = false;
return $success;
}
/**
* @brief Starts a transaction
*
* @return boolean Was the command executed successfully?
*/
public static function transaction() {
if (!self::e('COMMIT')) {
return false;
}
if (!self::e('START TRANSACTION')) {
return false;
}
self::$in_transaction = true;
return true;
}
/**
* @brief Does a commit
*
* @return boolean Was the command executed successfully?
*/
public static function commit() {
if (!self::e('COMMIT')) {
return false;
}
self::$in_transaction = false;
return true;
}
/**
* @brief Does a rollback
*
* @return boolean Was the command executed successfully?
*/
public static function rollback() {
if (!self::e('ROLLBACK')) {
return false;
}
self::$in_transaction = false;
return true;
}
/**
* @brief Build the array with the table relations
*
* The array is build from the database definitions in dbstructure.php
*
* This process must only be started once, since the value is cached.
*/
private static function build_relation_data() {
$definition = db_definition();
foreach ($definition AS $table => $structure) {
foreach ($structure['fields'] AS $field => $field_struct) {
if (isset($field_struct['relation'])) {
foreach ($field_struct['relation'] AS $rel_table => $rel_field) {
self::$relation[$rel_table][$rel_field][$table][] = $field;
}
}
}
}
}
/**
* @brief Delete a row from a table
*
* @param string $table Table name
* @param array $param parameter array
* @param boolean $in_process Internal use: Only do a commit after the last delete
* @param array $callstack Internal use: prevent endless loops
*
* @return boolean|array was the delete successfull? When $in_process is set: deletion data
*/
public static function delete($table, $param, $in_process = false, &$callstack = array()) {
$commands = array();
// Create a key for the loop prevention
$key = $table.':'.implode(':', array_keys($param)).':'.implode(':', $param);
// We quit when this key already exists in the callstack.
if (isset($callstack[$key])) {
return $commands;
}
$callstack[$key] = true;
$table = self::escape($table);
$commands[$key] = array('table' => $table, 'param' => $param);
// To speed up the whole process we cache the table relations
if (count(self::$relation) == 0) {
self::build_relation_data();
}
// Is there a relation entry for the table?
if (isset(self::$relation[$table])) {
// We only allow a simple "one field" relation.
$field = array_keys(self::$relation[$table])[0];
$rel_def = array_values(self::$relation[$table])[0];
// Create a key for preventing double queries
$qkey = $field.'-'.$table.':'.implode(':', array_keys($param)).':'.implode(':', $param);
// When the search field is the relation field, we don't need to fetch the rows
// This is useful when the leading record is already deleted in the frontend but the rest is done in the backend
if ((count($param) == 1) && ($field == array_keys($param)[0])) {
foreach ($rel_def AS $rel_table => $rel_fields) {
foreach ($rel_fields AS $rel_field) {
$retval = self::delete($rel_table, array($rel_field => array_values($param)[0]), true, $callstack);
$commands = array_merge($commands, $retval);
}
}
// We quit when this key already exists in the callstack.
} elseif (!isset($callstack[$qkey])) {
$callstack[$qkey] = true;
// Fetch all rows that are to be deleted
$data = self::select($table, array($field), $param);
while ($row = self::fetch($data)) {
// Now we accumulate the delete commands
$retval = self::delete($table, array($field => $row[$field]), true, $callstack);
$commands = array_merge($commands, $retval);
}
self::close($data);
// Since we had split the delete command we don't need the original command anymore
unset($commands[$key]);
}
}
if (!$in_process) {
// Now we finalize the process
$do_transaction = !self::$in_transaction;
if ($do_transaction) {
self::transaction();
}
$compacted = array();
$counter = array();
foreach ($commands AS $command) {
$condition = $command['param'];
$array_element = each($condition);
$array_key = $array_element['key'];
if (is_int($array_key)) {
$condition_string = " WHERE ".array_shift($condition);
} else {
$condition_string = " WHERE `".implode("` = ? AND `", array_keys($condition))."` = ?";
}
if ((count($command['param']) > 1) || is_int($array_key)) {
$sql = "DELETE FROM `".$command['table']."`".$condition_string;
logger(self::replace_parameters($sql, $condition), LOGGER_DATA);
if (!self::e($sql, $condition)) {
if ($do_transaction) {
self::rollback();
}
return false;
}
} else {
$key_table = $command['table'];
$key_param = array_keys($command['param'])[0];
$value = array_values($command['param'])[0];
// Split the SQL queries in chunks of 100 values
// We do the $i stuff here to make the code better readable
$i = $counter[$key_table][$key_param];
if (count($compacted[$key_table][$key_param][$i]) > 100) {
++$i;
}
$compacted[$key_table][$key_param][$i][$value] = $value;
$counter[$key_table][$key_param] = $i;
}
}
foreach ($compacted AS $table => $values) {
foreach ($values AS $field => $field_value_list) {
foreach ($field_value_list AS $field_values) {
$sql = "DELETE FROM `".$table."` WHERE `".$field."` IN (".
substr(str_repeat("?, ", count($field_values)), 0, -2).");";
logger(self::replace_parameters($sql, $field_values), LOGGER_DATA);
if (!self::e($sql, $field_values)) {
if ($do_transaction) {
self::rollback();
}
return false;
}
}
}
}
if ($do_transaction) {
self::commit();
}
return true;
}
return $commands;
}
/**
* @brief Updates rows
*
* Updates rows in the database. When $old_fields is set to an array,
* the system will only do an update if the fields in that array changed.
*
* Attention:
* Only the values in $old_fields are compared.
* This is an intentional behaviour.
*
* Example:
* We include the timestamp field in $fields but not in $old_fields.
* Then the row will only get the new timestamp when the other fields had changed.
*
* When $old_fields is set to a boolean value the system will do this compare itself.
* When $old_fields is set to "true" the system will do an insert if the row doesn't exists.
*
* Attention:
* Only set $old_fields to a boolean value when you are sure that you will update a single row.
* When you set $old_fields to "true" then $fields must contain all relevant fields!
*
* @param string $table Table name
* @param array $fields contains the fields that are updated
* @param array $condition condition array with the key values
* @param array|boolean $old_fields array with the old field values that are about to be replaced (true = update on duplicate)
*
* @return boolean was the update successfull?
*/
public static function update($table, $fields, $condition, $old_fields = array()) {
$table = self::escape($table);
if (count($condition) > 0) {
$array_element = each($condition);
$array_key = $array_element['key'];
if (is_int($array_key)) {
$condition_string = " WHERE ".array_shift($condition);
} else {
$condition_string = " WHERE `".implode("` = ? AND `", array_keys($condition))."` = ?";
}
} else {
$condition_string = "";
}
if (is_bool($old_fields)) {
$do_insert = $old_fields;
$old_fields = self::select($table, array(), $condition, array('limit' => 1));
if (is_bool($old_fields)) {
if ($do_insert) {
$values = array_merge($condition, $fields);
return self::insert($table, $values, $do_insert);
}
$old_fields = array();
}
}
$do_update = (count($old_fields) == 0);
foreach ($old_fields AS $fieldname => $content) {
if (isset($fields[$fieldname])) {
if ($fields[$fieldname] == $content) {
unset($fields[$fieldname]);
} else {
$do_update = true;
}
}
}
if (!$do_update || (count($fields) == 0)) {
return true;
}
$sql = "UPDATE `".$table."` SET `".
implode("` = ?, `", array_keys($fields))."` = ?".$condition_string;
$params1 = array_values($fields);
$params2 = array_values($condition);
$params = array_merge_recursive($params1, $params2);
return self::e($sql, $params);
}
/**
* @brief Select rows from a table
*
* @param string $table Table name
* @param array $fields array of selected fields
* @param array $condition array of fields for condition
* @param array $params array of several parameters
*
* @return boolean|object If "limit" is equal "1" only a single row is returned, else a query object is returned
*
* Example:
* $table = "item";
* $fields = array("id", "uri", "uid", "network");
*
* $condition = array("uid" => 1, "network" => 'dspr');
* or:
* $condition = array("`uid` = ? AND `network` IN (?, ?)", 1, 'dfrn', 'dspr');
*
* $params = array("order" => array("id", "received" => true), "limit" => 1);
*
* $data = dba::select($table, $fields, $condition, $params);
*/
public static function select($table, $fields = array(), $condition = array(), $params = array()) {
if ($table == '') {
return false;
}
if (count($fields) > 0) {
$select_fields = "`".implode("`, `", array_values($fields))."`";
} else {
$select_fields = "*";
}
if (count($condition) > 0) {
$array_element = each($condition);
$array_key = $array_element['key'];
if (is_int($array_key)) {
$condition_string = " WHERE ".array_shift($condition);
} else {
$condition_string = " WHERE `".implode("` = ? AND `", array_keys($condition))."` = ?";
}
} else {
$condition_string = "";
}
$param_string = '';
$single_row = false;
if (isset($params['order'])) {
$param_string .= " ORDER BY ";
foreach ($params['order'] AS $fields => $order) {
if (!is_int($fields)) {
$param_string .= "`".$fields."` ".($order ? "DESC" : "ASC").", ";
} else {
$param_string .= "`".$order."`, ";
}
}
$param_string = substr($param_string, 0, -2);
}
if (isset($params['limit']) && is_int($params['limit'])) {
$param_string .= " LIMIT ".$params['limit'];
$single_row = ($params['limit'] == 1);
}
if (isset($params['only_query']) && $params['only_query']) {
$single_row = !$params['only_query'];
}
$sql = "SELECT ".$select_fields." FROM `".$table."`".$condition_string.$param_string;
$result = self::p($sql, $condition);
if (is_bool($result) || !$single_row) {
return $result;
} else {
$row = self::fetch($result);
self::close($result);
return $row;
}
}
/**
* @brief Fills an array with data from a query
*
* @param object $stmt statement object
* @return array Data array
*/
public static function inArray($stmt, $do_close = true) {
if (is_bool($stmt)) {
return $stmt;
}
$data = array();
while ($row = self::fetch($stmt)) {
$data[] = $row;
}
if ($do_close) {
self::close($stmt);
}
return $data;
}
/**
* @brief Returns the error number of the last query
*
* @return string Error number (0 if no error)
*/
public static function errorNo() {
return self::$errorno;
}
/**
* @brief Returns the error message of the last query
*
* @return string Error message ('' if no error)
*/
public static function errorMessage() {
return self::$error;
}
/**
* @brief Closes the current statement
*
* @param object $stmt statement object
* @return boolean was the close successfull?
*/
public static function close($stmt) {
if (!is_object($stmt)) {
return false;
}
switch (self::$driver) {
case 'pdo':
return $stmt->closeCursor();
case 'mysqli':
return $stmt->free_result();
return $stmt->close();
case 'mysql':
return mysql_free_result($stmt);
}
}
}
function dbesc($str) {
if (dba::$connected) {
return(dba::escape($str));
} else {
return(str_replace("'","\\'",$str));
}
}
/**
* @brief execute SQL query with printf style args - deprecated
*
* Please use the dba:: functions instead:
* dba::select, dba::exists, dba::insert
* dba::delete, dba::update, dba::p, dba::e
*
* @param $args Query parameters (1 to N parameters of different types)
* @return array Query array
*/
function q($sql) {
$args = func_get_args();
unset($args[0]);
if (!dba::$connected) {
return false;
}
$sql = dba::clean_query($sql);
$sql = dba::any_value_fallback($sql);
$stmt = @vsprintf($sql, $args);
$ret = dba::p($stmt);
if (is_bool($ret)) {
return $ret;
}
$columns = dba::columnCount($ret);
$data = dba::inArray($ret);
if ((count($data) == 0) && ($columns == 0)) {
return true;
}
return $data;
}
function dba_timer() {
return microtime(true);
}