536 lines
14 KiB
PHP
536 lines
14 KiB
PHP
<?php
|
|
/*****************************************************************************
|
|
* Database.php
|
|
* Contains key class Database.
|
|
*
|
|
* Adapted from SMF 2.0's DBA (C) 2011 Simple Machines
|
|
* Used under BSD 3-clause license.
|
|
*
|
|
* Kabuki CMS (C) 2013-2015, Aaron van Geffen
|
|
*****************************************************************************/
|
|
|
|
/**
|
|
* The database model used to communicate with the MySQL server.
|
|
*/
|
|
class Database
|
|
{
|
|
private $connection;
|
|
private $query_count = 0;
|
|
private $logged_queries = [];
|
|
|
|
/**
|
|
* Initialises a new database connection.
|
|
* @param server: server to connect to.
|
|
* @param user: username to use for authentication.
|
|
* @param password: password to use for authentication.
|
|
* @param name: database to select.
|
|
*/
|
|
public function __construct($server, $user, $password, $name)
|
|
{
|
|
$this->connection = @mysqli_connect($server, $user, $password, $name);
|
|
|
|
// Give up if we have a connection error.
|
|
if (mysqli_connect_error())
|
|
{
|
|
header('HTTP/1.1 503 Service Temporarily Unavailable');
|
|
echo '<h2>Database Connection Problems</h2><p>Our software could not connect to the database. We apologise for any inconvenience and ask you to check back later.</p>';
|
|
exit;
|
|
}
|
|
|
|
$this->query('SET NAMES {string:utf8}', array('utf8' => 'utf8'));
|
|
}
|
|
|
|
public function getQueryCount()
|
|
{
|
|
return $this->query_count;
|
|
}
|
|
|
|
public function getLoggedQueries()
|
|
{
|
|
return $this->logged_queries;
|
|
}
|
|
|
|
/**
|
|
* Fetches a row from a given recordset, using field names as keys.
|
|
*/
|
|
public function fetch_assoc($resource)
|
|
{
|
|
return mysqli_fetch_assoc($resource);
|
|
}
|
|
|
|
/**
|
|
* Fetches a row from a given recordset, using numeric keys.
|
|
*/
|
|
public function fetch_row($resource)
|
|
{
|
|
return mysqli_fetch_row($resource);
|
|
}
|
|
|
|
/**
|
|
* Destroys a given recordset.
|
|
*/
|
|
public function free_result($resource)
|
|
{
|
|
return mysqli_free_result($resource);
|
|
}
|
|
|
|
public function data_seek($result, $row_num)
|
|
{
|
|
return mysqli_data_seek($result, $row_num);
|
|
}
|
|
|
|
/**
|
|
* Returns the amount of rows in a given recordset.
|
|
*/
|
|
public function num_rows($resource)
|
|
{
|
|
return mysqli_num_rows($resource);
|
|
}
|
|
|
|
/**
|
|
* Returns the amount of fields in a given recordset.
|
|
*/
|
|
public function num_fields($resource)
|
|
{
|
|
return mysqli_num_fields($resource);
|
|
}
|
|
|
|
/**
|
|
* Escapes a string.
|
|
*/
|
|
public function escape_string($string)
|
|
{
|
|
return mysqli_real_escape_string($this->connection, $string);
|
|
}
|
|
|
|
/**
|
|
* Unescapes a string.
|
|
*/
|
|
public function unescape_string($string)
|
|
{
|
|
return stripslashes($string);
|
|
}
|
|
|
|
/**
|
|
* Returns the last MySQL error.
|
|
*/
|
|
public function error()
|
|
{
|
|
return mysqli_error($this->connection);
|
|
}
|
|
|
|
public function server_info()
|
|
{
|
|
return mysqli_get_server_info($this->connection);
|
|
}
|
|
|
|
/**
|
|
* Selects a database on a given connection.
|
|
*/
|
|
public function select_db($database)
|
|
{
|
|
return mysqli_select_db($database, $this->connection);
|
|
}
|
|
|
|
/**
|
|
* Returns the amount of rows affected by the previous query.
|
|
*/
|
|
public function affected_rows()
|
|
{
|
|
return mysqli_affected_rows($this->connection);
|
|
}
|
|
|
|
/**
|
|
* Returns the id of the row created by a previous query.
|
|
*/
|
|
public function insert_id()
|
|
{
|
|
return mysqli_insert_id($this->connection);
|
|
}
|
|
|
|
/**
|
|
* Do a MySQL transaction.
|
|
*/
|
|
public function transaction($operation = 'commit')
|
|
{
|
|
switch ($operation)
|
|
{
|
|
case 'begin':
|
|
case 'rollback':
|
|
case 'commit':
|
|
return @mysqli_query($this->connection, strtoupper($operation));
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Function used as a callback for the preg_match function that parses variables into database queries.
|
|
*/
|
|
private function replacement_callback($matches)
|
|
{
|
|
list ($values, $connection) = $this->db_callback;
|
|
|
|
if (!isset($matches[2]))
|
|
trigger_error('Invalid value inserted or no type specified.', E_USER_ERROR);
|
|
|
|
if (!isset($values[$matches[2]]))
|
|
trigger_error('The database value you\'re trying to insert does not exist: ' . htmlspecialchars($matches[2]), E_USER_ERROR);
|
|
|
|
$replacement = $values[$matches[2]];
|
|
|
|
switch ($matches[1])
|
|
{
|
|
case 'int':
|
|
if ((!is_numeric($replacement) || (string) $replacement !== (string) (int) $replacement) && $replacement !== 'NULL')
|
|
trigger_error('Wrong value type sent to the database for field: ' . $matches[2] . '. Integer expected.', E_USER_ERROR);
|
|
return $replacement !== 'NULL' ? (string) (int) $replacement : 'NULL';
|
|
break;
|
|
|
|
case 'string':
|
|
case 'text':
|
|
return $replacement !== 'NULL' ? sprintf('\'%1$s\'', mysqli_real_escape_string($connection, $replacement)) : 'NULL';
|
|
break;
|
|
|
|
case 'array_int':
|
|
if (is_array($replacement))
|
|
{
|
|
if (empty($replacement))
|
|
trigger_error('Database error, given array of integer values is empty.', E_USER_ERROR);
|
|
|
|
foreach ($replacement as $key => $value)
|
|
{
|
|
if (!is_numeric($value) || (string) $value !== (string) (int) $value)
|
|
trigger_error('Wrong value type sent to the database for field: ' . $matches[2] . '. Array of integers expected.', E_USER_ERROR);
|
|
|
|
$replacement[$key] = (string) (int) $value;
|
|
}
|
|
|
|
return implode(', ', $replacement);
|
|
}
|
|
else
|
|
trigger_error('Wrong value type sent to the database for field: ' . $matches[2] . '. Array of integers expected.', E_USER_ERROR);
|
|
|
|
break;
|
|
|
|
case 'array_string':
|
|
if (is_array($replacement))
|
|
{
|
|
if (empty($replacement))
|
|
trigger_error('Database error, given array of string values is empty.', E_USER_ERROR);
|
|
|
|
foreach ($replacement as $key => $value)
|
|
$replacement[$key] = sprintf('\'%1$s\'', mysqli_real_escape_string($connection, $value));
|
|
|
|
return implode(', ', $replacement);
|
|
}
|
|
else
|
|
trigger_error('Wrong value type sent to the database for field: ' . $matches[2] . '. Array of strings expected.', E_USER_ERROR);
|
|
break;
|
|
|
|
case 'date':
|
|
if (preg_match('~^(\d{4})-([0-1]?\d)-([0-3]?\d)$~', $replacement, $date_matches) === 1)
|
|
return sprintf('\'%04d-%02d-%02d\'', $date_matches[1], $date_matches[2], $date_matches[3]);
|
|
elseif ($replacement === 'NULL')
|
|
return 'NULL';
|
|
else
|
|
trigger_error('Wrong value type sent to the database for field: ' . $matches[2] . '. Date expected.', E_USER_ERROR);
|
|
break;
|
|
|
|
case 'datetime':
|
|
if (is_a($replacement, 'DateTime'))
|
|
return $replacement->format('\'Y-m-d H:i:s\'');
|
|
elseif (preg_match('~^(\d{4})-([0-1]?\d)-([0-3]?\d) (\d{2}):(\d{2}):(\d{2})$~', $replacement, $date_matches) === 1)
|
|
return sprintf('\'%04d-%02d-%02d %02d:%02d:%02d\'', $date_matches[1], $date_matches[2], $date_matches[3], $date_matches[4], $date_matches[5], $date_matches[6]);
|
|
elseif ($replacement === 'NULL')
|
|
return 'NULL';
|
|
else
|
|
trigger_error('Wrong value type sent to the database for field: ' . $matches[2] . '. DateTime expected.', E_USER_ERROR);
|
|
break;
|
|
|
|
case 'float':
|
|
if (!is_numeric($replacement) && $replacement !== 'NULL')
|
|
trigger_error('Wrong value type sent to the database for field: ' . $matches[2] . '. Floating point number expected.', E_USER_ERROR);
|
|
return $replacement !== 'NULL' ? (string) (float) $replacement : 'NULL';
|
|
break;
|
|
|
|
case 'identifier':
|
|
// Backticks inside identifiers are supported as of MySQL 4.1. We don't need them here.
|
|
return '`' . strtr($replacement, array('`' => '', '.' => '')) . '`';
|
|
break;
|
|
|
|
case 'raw':
|
|
return $replacement;
|
|
break;
|
|
|
|
case 'bool':
|
|
case 'boolean':
|
|
// In mysql this is a synonym for tinyint(1)
|
|
return (bool)$replacement ? 1 : 0;
|
|
break;
|
|
|
|
default:
|
|
trigger_error('Undefined type <b>' . $matches[1] . '</b> used in the database query', E_USER_ERROR);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Escapes and quotes a string using values passed, and executes the query.
|
|
*/
|
|
public function query($db_string, $db_values = array())
|
|
{
|
|
// One more query....
|
|
$this->query_count ++;
|
|
|
|
// Overriding security? This is evil!
|
|
$security_override = $db_values === 'security_override' || !empty($db_values['security_override']);
|
|
|
|
// Please, just use new style queries.
|
|
if (strpos($db_string, '\'') !== false && !$security_override)
|
|
trigger_error('Hack attempt!', 'Illegal character (\') used in query.', E_USER_ERROR);
|
|
|
|
if (!$security_override && !empty($db_values))
|
|
{
|
|
// Set some values for use in the callback function.
|
|
$this->db_callback = array($db_values, $this->connection);
|
|
|
|
// Insert the values passed to this function.
|
|
$db_string = preg_replace_callback('~{([a-z_]+)(?::([a-zA-Z0-9_-]+))?}~', array(&$this, 'replacement_callback'), $db_string);
|
|
|
|
// Save some memory.
|
|
$this->db_callback = [];
|
|
}
|
|
|
|
if (defined("DB_LOG_QUERIES") && DB_LOG_QUERIES)
|
|
$this->logged_queries[] = $db_string;
|
|
|
|
$return = @mysqli_query($this->connection, $db_string, empty($this->unbuffered) ? MYSQLI_STORE_RESULT : MYSQLI_USE_RESULT);
|
|
|
|
if (!$return)
|
|
{
|
|
$clean_sql = implode("\n", array_map('trim', explode("\n", $db_string)));
|
|
trigger_error($this->error() . '<br>' . $clean_sql, E_USER_ERROR);
|
|
}
|
|
|
|
return $return;
|
|
}
|
|
|
|
/**
|
|
* Escapes and quotes a string just like db_query, but does not execute the query.
|
|
* Useful for debugging purposes.
|
|
*/
|
|
public function quote($db_string, $db_values = array())
|
|
{
|
|
// Please, just use new style queries.
|
|
if (strpos($db_string, '\'') !== false)
|
|
trigger_error('Hack attempt!', 'Illegal character (\') used in query.', E_USER_ERROR);
|
|
|
|
// Save some values for use in the callback function.
|
|
$this->db_callback = array($db_values, $this->connection);
|
|
|
|
// Insert the values passed to this function.
|
|
$db_string = preg_replace_callback('~{([a-z_]+)(?::([a-zA-Z0-9_-]+))?}~', array(&$this, 'replacement_callback'), $db_string);
|
|
|
|
// Save some memory.
|
|
$this->db_callback = array();
|
|
|
|
return $db_string;
|
|
}
|
|
|
|
/**
|
|
* Executes a query, returning an array of all the rows it returns.
|
|
*/
|
|
public function queryRow($db_string, $db_values = array())
|
|
{
|
|
$res = $this->query($db_string, $db_values);
|
|
|
|
if (!$res || $this->num_rows($res) == 0)
|
|
return array();
|
|
|
|
$row = $this->fetch_row($res);
|
|
$this->free_result($res);
|
|
|
|
return $row;
|
|
}
|
|
|
|
/**
|
|
* Executes a query, returning an array of all the rows it returns.
|
|
*/
|
|
public function queryRows($db_string, $db_values = array())
|
|
{
|
|
$res = $this->query($db_string, $db_values);
|
|
|
|
if (!$res || $this->num_rows($res) == 0)
|
|
return array();
|
|
|
|
$rows = array();
|
|
while ($row = $this->fetch_row($res))
|
|
$rows[] = $row;
|
|
|
|
$this->free_result($res);
|
|
|
|
return $rows;
|
|
}
|
|
|
|
/**
|
|
* Executes a query, returning an array of all the rows it returns.
|
|
*/
|
|
public function queryPair($db_string, $db_values = array())
|
|
{
|
|
$res = $this->query($db_string, $db_values);
|
|
|
|
if (!$res || $this->num_rows($res) == 0)
|
|
return array();
|
|
|
|
$rows = array();
|
|
while ($row = $this->fetch_row($res))
|
|
$rows[$row[0]] = $row[1];
|
|
|
|
$this->free_result($res);
|
|
|
|
return $rows;
|
|
}
|
|
|
|
/**
|
|
* Executes a query, returning an array of all the rows it returns.
|
|
*/
|
|
public function queryPairs($db_string, $db_values = array())
|
|
{
|
|
$res = $this->query($db_string, $db_values);
|
|
|
|
if (!$res || $this->num_rows($res) == 0)
|
|
return array();
|
|
|
|
$rows = array();
|
|
while ($row = $this->fetch_assoc($res))
|
|
{
|
|
$key_value = reset($row);
|
|
$rows[$key_value] = $row;
|
|
}
|
|
|
|
$this->free_result($res);
|
|
|
|
return $rows;
|
|
}
|
|
|
|
/**
|
|
* Executes a query, returning an associative array of all the rows it returns.
|
|
*/
|
|
public function queryAssoc($db_string, $db_values = array())
|
|
{
|
|
$res = $this->query($db_string, $db_values);
|
|
|
|
if (!$res || $this->num_rows($res) == 0)
|
|
return array();
|
|
|
|
$row = $this->fetch_assoc($res);
|
|
$this->free_result($res);
|
|
|
|
return $row;
|
|
}
|
|
|
|
/**
|
|
* Executes a query, returning an associative array of all the rows it returns.
|
|
*/
|
|
public function queryAssocs($db_string, $db_values = array(), $connection = null)
|
|
{
|
|
$res = $this->query($db_string, $db_values);
|
|
|
|
if (!$res || $this->num_rows($res) == 0)
|
|
return array();
|
|
|
|
$rows = array();
|
|
while ($row = $this->fetch_assoc($res))
|
|
$rows[] = $row;
|
|
|
|
$this->free_result($res);
|
|
|
|
return $rows;
|
|
}
|
|
|
|
/**
|
|
* Executes a query, returning the first value of the first row.
|
|
*/
|
|
public function queryValue($db_string, $db_values = array())
|
|
{
|
|
$res = $this->query($db_string, $db_values);
|
|
|
|
// If this happens, you're doing it wrong.
|
|
if (!$res || $this->num_rows($res) == 0)
|
|
return null;
|
|
|
|
list($value) = $this->fetch_row($res);
|
|
$this->free_result($res);
|
|
|
|
return $value;
|
|
}
|
|
|
|
/**
|
|
* Executes a query, returning an array of the first value of each row.
|
|
*/
|
|
public function queryValues($db_string, $db_values = array())
|
|
{
|
|
$res = $this->query($db_string, $db_values);
|
|
|
|
if (!$res || $this->num_rows($res) == 0)
|
|
return array();
|
|
|
|
$rows = array();
|
|
while ($row = $this->fetch_row($res))
|
|
$rows[] = $row[0];
|
|
|
|
$this->free_result($res);
|
|
|
|
return $rows;
|
|
}
|
|
|
|
/**
|
|
* This function can be used to insert data into the database in a secure way.
|
|
*/
|
|
public function insert($method = 'replace', $table, $columns, $data)
|
|
{
|
|
// With nothing to insert, simply return.
|
|
if (empty($data))
|
|
return;
|
|
|
|
// Inserting data as a single row can be done as a single array.
|
|
if (!is_array($data[array_rand($data)]))
|
|
$data = array($data);
|
|
|
|
// Create the mold for a single row insert.
|
|
$insertData = '(';
|
|
foreach ($columns as $columnName => $type)
|
|
{
|
|
// Are we restricting the length?
|
|
if (strpos($type, 'string-') !== false)
|
|
$insertData .= sprintf('SUBSTRING({string:%1$s}, 1, ' . substr($type, 7) . '), ', $columnName);
|
|
else
|
|
$insertData .= sprintf('{%1$s:%2$s}, ', $type, $columnName);
|
|
}
|
|
$insertData = substr($insertData, 0, -2) . ')';
|
|
|
|
// Create an array consisting of only the columns.
|
|
$indexed_columns = array_keys($columns);
|
|
|
|
// Here's where the variables are injected to the query.
|
|
$insertRows = array();
|
|
foreach ($data as $dataRow)
|
|
$insertRows[] = $this->quote($insertData, array_combine($indexed_columns, $dataRow));
|
|
|
|
// Determine the method of insertion.
|
|
$queryTitle = $method == 'replace' ? 'REPLACE' : ($method == 'ignore' ? 'INSERT IGNORE' : 'INSERT');
|
|
|
|
// Do the insert.
|
|
return $this->query('
|
|
' . $queryTitle . ' INTO ' . $table . ' (`' . implode('`, `', $indexed_columns) . '`)
|
|
VALUES
|
|
' . implode(',
|
|
', $insertRows),
|
|
array(
|
|
'security_override' => true,
|
|
)
|
|
);
|
|
}
|
|
}
|