select_db($database))
{
throw new Exception('Connection to server succeed, but it was impossible to connect to database');
}
}
function pwg_db_check_charset()
{
$db_charset = 'utf8';
if (defined('DB_CHARSET') and DB_CHARSET != '')
{
$db_charset = DB_CHARSET;
}
pwg_query('SET NAMES "'.$db_charset.'"');
}
function pwg_db_check_version()
{
$current_mysql = pwg_get_db_version();
if (version_compare($current_mysql, REQUIRED_MYSQL_VERSION, '<'))
{
fatal_error(
sprintf(
'your MySQL version is too old, you have "%s" and you need at least "%s"',
$current_mysql,
REQUIRED_MYSQL_VERSION
)
);
}
}
function pwg_get_db_version()
{
global $mysqli;
return $mysqli->server_info;
}
function pwg_query($query)
{
global $mysqli, $conf, $page, $debug, $t2;
$start = microtime(true);
($result = $mysqli->query($query)) or my_error($query, $conf['die_on_sql_error']);
$time = microtime(true) - $start;
if (!isset($page['count_queries']))
{
$page['count_queries'] = 0;
$page['queries_time'] = 0;
}
$page['count_queries']++;
$page['queries_time']+= $time;
if ($conf['show_queries'])
{
$output = '';
$output.= '['.$page['count_queries'].'] ';
$output.= "\n".$query;
$output.= "\n".'(this query time : ';
$output.= ''.number_format($time, 3, '.', ' ').' s)';
$output.= "\n".'(total SQL time : ';
$output.= number_format($page['queries_time'], 3, '.', ' ').' s)';
$output.= "\n".'(total time : ';
$output.= number_format( ($time+$start-$t2), 3, '.', ' ').' s)';
if ( $result!=null and preg_match('/\s*SELECT\s+/i',$query) )
{
$output.= "\n".'(num rows : ';
$output.= pwg_db_num_rows($result).' )';
}
elseif ( $result!=null
and preg_match('/\s*INSERT|UPDATE|REPLACE|DELETE\s+/i',$query) )
{
$output.= "\n".'(affected rows : ';
$output.= pwg_db_changes().' )';
}
$output.= "\n";
$debug .= $output;
}
return $result;
}
function pwg_db_nextval($column, $table)
{
$query = '
SELECT IF(MAX('.$column.')+1 IS NULL, 1, MAX('.$column.')+1)
FROM '.$table;
list($next) = pwg_db_fetch_row(pwg_query($query));
return $next;
}
function pwg_db_changes()
{
global $mysqli;
return $mysqli->affected_rows;
}
function pwg_db_num_rows($result)
{
return $result->num_rows;
}
function pwg_db_fetch_assoc($result)
{
return $result->fetch_assoc();
}
function pwg_db_fetch_row($result)
{
return $result->fetch_row();
}
function pwg_db_fetch_object($result)
{
return $result->fetch_object();
}
function pwg_db_free_result($result)
{
return $result->free_result();
}
function pwg_db_real_escape_string($s)
{
global $mysqli;
return $mysqli->real_escape_string($s);
}
function pwg_db_insert_id()
{
global $mysqli;
return $mysqli->insert_id;
}
function pwg_db_close()
{
global $mysqli;
return $mysqli->close();
}
/**
*
* complex functions
*
*/
/**
* creates an array based on a query, this function is a very common pattern
* used here
*
* @param string $query
* @param string $fieldname optional
* @return array
*/
function array_from_query($query, $fieldname=false)
{
$array = array();
$result = pwg_query($query);
if (false === $fieldname)
{
while ($row = pwg_db_fetch_assoc($result))
{
$array[] = $row;
}
}
else
{
while ($row = pwg_db_fetch_assoc($result))
{
$array[] = $row[$fieldname];
}
}
return $array;
}
define('MASS_UPDATES_SKIP_EMPTY', 1);
/**
* updates multiple lines in a table
*
* @param string table_name
* @param array dbfields
* @param array datas
* @param int flags - if MASS_UPDATES_SKIP_EMPTY - empty values do not overwrite existing ones
* @return void
*/
function mass_updates($tablename, $dbfields, $datas, $flags=0)
{
if (count($datas) == 0)
return;
// depending on the MySQL version, we use the multi table update or N update queries
if (count($datas) < 10)
{
foreach ($datas as $data)
{
$query = '
UPDATE '.$tablename.'
SET ';
$is_first = true;
foreach ($dbfields['update'] as $key)
{
$separator = $is_first ? '' : ",\n ";
if (isset($data[$key]) and $data[$key] != '')
{
$query.= $separator.$key.' = \''.$data[$key].'\'';
}
else
{
if ( $flags & MASS_UPDATES_SKIP_EMPTY )
continue; // next field
$query.= "$separator$key = NULL";
}
$is_first = false;
}
if (!$is_first)
{// only if one field at least updated
$query.= '
WHERE ';
$is_first = true;
foreach ($dbfields['primary'] as $key)
{
if (!$is_first)
{
$query.= ' AND ';
}
if ( isset($data[$key]) )
{
$query.= $key.' = \''.$data[$key].'\'';
}
else
{
$query.= $key.' IS NULL';
}
$is_first = false;
}
pwg_query($query);
}
} // foreach update
} // if mysqli_ver or count $value)
{
$separator = $is_first ? '' : ",\n ";
if (isset($value) and $value !== '')
{
$query.= $separator.$key.' = \''.$value.'\'';
}
else
{
if ( $flags & MASS_UPDATES_SKIP_EMPTY )
continue; // next field
$query.= "$separator$key = NULL";
}
$is_first = false;
}
if (!$is_first)
{// only if one field at least updated
$query.= '
WHERE ';
$is_first = true;
foreach ($where_fields as $key => $value)
{
if (!$is_first)
{
$query.= ' AND ';
}
if ( isset($value) )
{
$query.= $key.' = \''.$value.'\'';
}
else
{
$query.= $key.' IS NULL';
}
$is_first = false;
}
pwg_query($query);
}
}
/**
* inserts multiple lines in a table
*
* @param string table_name
* @param array dbfields
* @param array inserts
* @return void
*/
function mass_inserts($table_name, $dbfields, $datas, $options=array())
{
$ignore = '';
if (isset($options['ignore']) and $options['ignore'])
{
$ignore = 'IGNORE';
}
if (count($datas) != 0)
{
$first = true;
$query = 'SHOW VARIABLES LIKE \'max_allowed_packet\'';
list(, $packet_size) = pwg_db_fetch_row(pwg_query($query));
$packet_size = $packet_size - 2000; // The last list of values MUST not exceed 2000 character*/
$query = '';
foreach ($datas as $insert)
{
if (strlen($query) >= $packet_size)
{
pwg_query($query);
$first = true;
}
if ($first)
{
$query = '
INSERT '.$ignore.' INTO '.$table_name.'
('.implode(',', $dbfields).')
VALUES';
$first = false;
}
else
{
$query .= '
, ';
}
$query .= '(';
foreach ($dbfields as $field_id => $dbfield)
{
if ($field_id > 0)
{
$query .= ',';
}
if (!isset($insert[$dbfield]) or $insert[$dbfield] === '')
{
$query .= 'NULL';
}
else
{
$query .= "'".$insert[$dbfield]."'";
}
}
$query .= ')';
}
pwg_query($query);
}
}
/**
* inserts one line in a table
*
* @param string table_name
* @param array dbfields
* @param array insert
* @return void
*/
function single_insert($table_name, $data)
{
if (count($data) != 0)
{
$query = '
INSERT INTO '.$table_name.'
('.implode(',', array_keys($data)).')
VALUES';
$query .= '(';
$is_first = true;
foreach ($data as $key => $value)
{
if (!$is_first)
{
$query .= ',';
}
else
{
$is_first = false;
}
if ($value === '')
{
$query .= 'NULL';
}
else
{
$query .= "'".$value."'";
}
}
$query .= ')';
pwg_query($query);
}
}
/**
* Do maintenance on all PWG tables
*
* @return none
*/
function do_maintenance_all_tables()
{
global $prefixeTable, $page;
$all_tables = array();
// List all tables
$query = 'SHOW TABLES LIKE \''.$prefixeTable.'%\'';
$result = pwg_query($query);
while ($row = pwg_db_fetch_row($result))
{
array_push($all_tables, $row[0]);
}
// Repair all tables
$query = 'REPAIR TABLE '.implode(', ', $all_tables);
$mysqli_rc = pwg_query($query);
// Re-Order all tables
foreach ($all_tables as $table_name)
{
$all_primary_key = array();
$query = 'DESC '.$table_name.';';
$result = pwg_query($query);
while ($row = pwg_db_fetch_assoc($result))
{
if ($row['Key'] == 'PRI')
{
array_push($all_primary_key, $row['Field']);
}
}
if (count($all_primary_key) != 0)
{
$query = 'ALTER TABLE '.$table_name.' ORDER BY '.implode(', ', $all_primary_key).';';
$mysqli_rc = $mysqli_rc && pwg_query($query);
}
}
// Optimize all tables
$query = 'OPTIMIZE TABLE '.implode(', ', $all_tables);
$mysqli_rc = $mysqli_rc && pwg_query($query);
if ($mysqli_rc)
{
array_push(
$page['infos'],
l10n('All optimizations have been successfully completed.')
);
}
else
{
array_push(
$page['errors'],
l10n('Optimizations have been completed with some errors.')
);
}
}
function pwg_db_concat($array)
{
$string = implode($array, ',');
return 'CONCAT('. $string.')';
}
function pwg_db_concat_ws($array, $separator)
{
$string = implode($array, ',');
return 'CONCAT_WS(\''.$separator.'\','. $string.')';
}
function pwg_db_cast_to_text($string)
{
return $string;
}
/**
* returns an array containing the possible values of an enum field
*
* @param string tablename
* @param string fieldname
*/
function get_enums($table, $field)
{
// retrieving the properties of the table. Each line represents a field :
// columns are 'Field', 'Type'
$result = pwg_query('desc '.$table);
while ($row = pwg_db_fetch_assoc($result))
{
// we are only interested in the the field given in parameter for the
// function
if ($row['Field'] == $field)
{
// retrieving possible values of the enum field
// enum('blue','green','black')
$options = explode(',', substr($row['Type'], 5, -1));
foreach ($options as $i => $option)
{
$options[$i] = str_replace("'", '',$option);
}
}
}
pwg_db_free_result($result);
return $options;
}
/**
* Smartly checks if a variable is equivalent to true or false
*
* @param mixed input
* @return bool
*/
function get_boolean($input)
{
if ('false' === strtolower($input))
{
return false;
}
return (bool)$input;
}
/**
* returns boolean string 'true' or 'false' if the given var is boolean
*
* @param mixed $var
* @return mixed
*/
function boolean_to_string($var)
{
if (is_bool($var))
{
return $var ? 'true' : 'false';
}
else
{
return $var;
}
}
/**
*
* interval and date functions
*
*/
function pwg_db_get_recent_period_expression($period, $date='CURRENT_DATE')
{
if ($date!='CURRENT_DATE')
{
$date = '\''.$date.'\'';
}
return 'SUBDATE('.$date.',INTERVAL '.$period.' DAY)';
}
function pwg_db_get_recent_period($period, $date='CURRENT_DATE')
{
$query = '
SELECT '.pwg_db_get_recent_period_expression($period);
list($d) = pwg_db_fetch_row(pwg_query($query));
return $d;
}
function pwg_db_get_flood_period_expression($seconds)
{
return 'SUBDATE(now(), INTERVAL '.$seconds.' SECOND)';
}
function pwg_db_get_hour($date)
{
return 'hour('.$date.')';
}
function pwg_db_get_date_YYYYMM($date)
{
return 'DATE_FORMAT('.$date.', \'%Y%m\')';
}
function pwg_db_get_date_MMDD($date)
{
return 'DATE_FORMAT('.$date.', \'%m%d\')';
}
function pwg_db_get_year($date)
{
return 'YEAR('.$date.')';
}
function pwg_db_get_month($date)
{
return 'MONTH('.$date.')';
}
function pwg_db_get_week($date, $mode=null)
{
if ($mode)
{
return 'WEEK('.$date.', '.$mode.')';
}
else
{
return 'WEEK('.$date.')';
}
}
function pwg_db_get_dayofmonth($date)
{
return 'DAYOFMONTH('.$date.')';
}
function pwg_db_get_dayofweek($date)
{
return 'DAYOFWEEK('.$date.')';
}
function pwg_db_get_weekday($date)
{
return 'WEEKDAY('.$date.')';
}
function pwg_db_date_to_ts($date)
{
return 'UNIX_TIMESTAMP('.$date.')';
}
// my_error returns (or send to standard output) the message concerning the
// error occured for the last mysql query.
function my_error($header, $die)
{
global $mysqli;
$error = "[mysql error ".$mysqli->errno.'] '.$mysqli->error."\n";
$error .= $header;
if ($die)
{
fatal_error($error);
}
echo("");
trigger_error($error, E_USER_WARNING);
echo("");
}
?>