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functions_mysql.inc.php
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functions_mysqli.inc.php
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Editing: functions_mysqli.inc.php
<?php // +-----------------------------------------------------------------------+ // | This file is part of Piwigo. | // | | // | For copyright and license information, please view the COPYING.txt | // | file that was distributed with this source code. | // +-----------------------------------------------------------------------+ /** * @package functions\mysql */ define('DB_ENGINE', 'MySQL'); define('REQUIRED_MYSQL_VERSION', '5.0.0'); define('DB_REGEX_OPERATOR', 'REGEXP'); define('DB_RANDOM_FUNCTION', 'RAND'); /** * Connect to database and store MySQLi resource in __$mysqli__ global variable. * * @param string $host * - localhost * - 1.2.3.4:3405 * - /path/to/socket * @param string $user * @param string $password * @param string $database * * @throws Exception */ function pwg_db_connect($host, $user, $password, $database) { global $mysqli; $port = null; $socket = null; if (strpos($host, '/') === 0) { $socket = $host; $host = null; } elseif (strpos($host, ':') !== false) { list($host, $port) = explode(':', $host); } $dbname = null; $mysqli = new mysqli($host, $user, $password, $dbname, $port, $socket); if (mysqli_connect_error()) { throw new Exception("Can't connect to server"); } if (!$mysqli->select_db($database)) { throw new Exception('Connection to server succeed, but it was impossible to connect to database'); } // MySQL 5.7 default settings forbid to select a colum that is not in the // group by. We've used that in Piwigo, for years. As an immediate solution // we can remove this constraint in the current MySQL session. list($sql_mode_current) = pwg_db_fetch_row(pwg_query('SELECT @@SESSION.sql_mode')); // remove ONLY_FULL_GROUP_BY from the list $sql_mode_altered = implode(',', array_diff(explode(',', $sql_mode_current), array('ONLY_FULL_GROUP_BY'))); if ($sql_mode_altered != $sql_mode_current) { pwg_query("SET SESSION sql_mode='".$sql_mode_altered."'"); } } /** * Set charset for database connection. */ function pwg_db_check_charset() { global $mysqli; $db_charset = 'utf8'; if (defined('DB_CHARSET') and DB_CHARSET != '') { $db_charset = DB_CHARSET; } $mysqli->set_charset($db_charset); } /** * Check MySQL version. Can call fatal_error(). */ 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 ) ); } } /** * Get Mysql Version. * * @return string */ function pwg_get_db_version() { global $mysqli; return $mysqli->server_info; } /** * Execute a query * * @param string $query * @return mysqli_result|bool */ function pwg_query($query) { global $mysqli, $conf, $page, $debug, $t2; // starting with MySQL 8, rank becomes a reserved keyword, we need to escape it if (preg_match('/\brank\b/', $query)) { // first we unescape what's already escaped (to avoid double escaping) $query = preg_replace('/`rank`/', 'rank', $query); // then we escape the keyword $query = preg_replace('/\brank\b/', '`rank`', $query); } $start = microtime(true); ($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 = ''; $output.= '<pre>['.$page['count_queries'].'] '; $output.= "\n".$query; $output.= "\n".'(this query time : '; $output.= '<b>'.number_format($time, 3, '.', ' ').' s)</b>'; $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.= "</pre>\n"; $debug .= $output; } return $result; } /** * Get max value plus one of a particular column. * * @param string $column * @param string $table * @param int */ function pwg_db_nextval($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 $result->num_rows; } function pwg_db_fetch_array($result) { return $result->fetch_array(); } function pwg_db_fetch_assoc($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_errno() { global $mysqli; return $mysqli->errno; } function pwg_db_error() { global $mysqli; return $mysqli->error; } function pwg_db_close() { global $mysqli; return $mysqli->close(); } define('MASS_UPDATES_SKIP_EMPTY', 1); /** * Updates multiple lines in a table. * * @param string $tablename * @param array $dbfields - contains 'primary' and 'update' arrays * @param array $datas - indexed by column names * @param int $flags - if MASS_UPDATES_SKIP_EMPTY, empty values do not overwrite existing ones */ function mass_updates($tablename, $dbfields, $datas, $flags=0) { if (count($datas) == 0) { return; } // we use the multi table update or N update queries if (count($datas) < 10) { foreach ($datas as $data) { $is_first = true; $query = ' UPDATE '.protect_column_name($tablename).' SET '; foreach ($dbfields['update'] as $key) { $separator = $is_first ? '' : ",\n "; if (isset($data[$key]) and $data[$key] != '') { $query.= $separator.protect_column_name($key).' = \''.$data[$key].'\''; } else { if ($flags & MASS_UPDATES_SKIP_EMPTY) { continue; // next field } $query.= $separator.protect_column_name($key).' = NULL'; } $is_first = false; } if (!$is_first) {// only if one field at least updated $is_first = true; $query.= ' WHERE '; foreach ($dbfields['primary'] as $key) { if (!$is_first) { $query.= ' AND '; } if (isset($data[$key])) { $query.= protect_column_name($key).' = \''.$data[$key].'\''; } else { $query.= protect_column_name($key).' IS NULL'; } $is_first = false; } pwg_query($query); } } // foreach update } // if count<X else { // creation of the temporary table $result = pwg_query('SHOW FULL COLUMNS FROM '.protect_column_name($tablename)); $columns = array(); $all_fields = array_merge($dbfields['primary'], $dbfields['update']); while ($row = pwg_db_fetch_assoc($result)) { if (in_array($row['Field'], $all_fields)) { $column = '`'.$row['Field'].'`'; $column.= ' '.$row['Type']; $nullable = true; if (!isset($row['Null']) or $row['Null'] == '' or $row['Null']=='NO') { $column.= ' NOT NULL'; $nullable = false; } if (isset($row['Default'])) { $column.= " default '".$row['Default']."'"; } elseif ($nullable) { $column.= " default NULL"; } if (isset($row['Collation']) and $row['Collation'] != 'NULL') { $column.= " collate '".$row['Collation']."'"; } $columns[] = $column; } } $temporary_tablename = $tablename.'_'.micro_seconds(); $query = ' CREATE TABLE '.$temporary_tablename.' ( '.implode(",\n ", $columns).', UNIQUE KEY the_key ('.implode(',', $dbfields['primary']).') )'; pwg_query($query); mass_inserts($temporary_tablename, $all_fields, $datas); if ($flags & MASS_UPDATES_SKIP_EMPTY) $func_set = function($s) { return "t1.$s = IFNULL(t2.$s, t1.$s)"; }; else $func_set = function($s) { return "t1.$s = t2.$s"; }; // update of table by joining with temporary table $query = ' UPDATE '.protect_column_name($tablename).' AS t1, '.$temporary_tablename.' AS t2 SET '. implode( "\n , ", array_map($func_set,$dbfields['update']) ).' WHERE '. implode( "\n AND ", array_map( function($s) { return "t1.$s = t2.$s"; }, $dbfields['primary'] ) ); pwg_query($query); pwg_query('DROP TABLE '.$temporary_tablename); } } /** * Updates one line in a table. * * @param string $tablename * @param array $datas * @param array $where * @param int $flags - if MASS_UPDATES_SKIP_EMPTY, empty values do not overwrite existing ones */ function single_update($tablename, $datas, $where, $flags=0) { if (count($datas) == 0) { return; } $is_first = true; $query = ' UPDATE '.protect_column_name($tablename).' SET '; foreach ($datas as $key => $value) { $separator = $is_first ? '' : ",\n "; if (isset($value) and $value !== '') { $query.= $separator.protect_column_name($key).' = \''.$value.'\''; } else { if ($flags & MASS_UPDATES_SKIP_EMPTY) { continue; // next field } $query.= $separator.protect_column_name($key).' = NULL'; } $is_first = false; } if (!$is_first) {// only if one field at least updated $is_first = true; $query.= ' WHERE '; foreach ($where as $key => $value) { if (!$is_first) { $query.= ' AND '; } if (isset($value)) { $query.= protect_column_name($key).' = \''.$value.'\''; } else { $query.= protect_column_name($key).' IS NULL'; } $is_first = false; } pwg_query($query); } } /** * Inserts multiple lines in a table. * * @param string $table_name * @param array $dbfields - fields from $datas which will be used * @param array $datas * @param array $options * - boolean ignore - use "INSERT IGNORE" */ function mass_inserts($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 '.protect_column_name($table_name).' ('.implode(',', array_map('protect_column_name', $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 $data * @param array $options * - boolean ignore - use "INSERT IGNORE" */ function single_insert($table_name, $data, $options=array()) { $ignore = ''; if (isset($options['ignore']) and $options['ignore']) { $ignore = 'IGNORE'; } if (count($data) != 0) { $query = ' INSERT '.$ignore.' INTO '.protect_column_name($table_name).' ('.implode(',', array_map('protect_column_name', array_keys($data))).') VALUES'; $query .= '('; $is_first = true; foreach ($data as $key => $value) { if (!$is_first) { $query .= ','; } else { $is_first = false; } if ($value === '' || is_null($value)) { $query .= 'NULL'; } else { $query .= "'".$value."'"; } } $query .= ')'; pwg_query($query); } } function protect_column_name($column_name) { if ('`' != $column_name[0]) { $column_name = '`'.$column_name.'`'; } return $column_name; } /** * Do maintenance on all Piwigo tables */ 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)) { $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') { $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) { $page['infos'][] = l10n('All optimizations have been successfully completed.'); } else { $page['errors'][] = l10n('Optimizations have been completed with some errors.'); } } function pwg_db_concat($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 $table * @param string $field * @return string[] */ function get_enums($table, $field) { $result = pwg_query('DESC '.$table); while ($row = pwg_db_fetch_assoc($result)) { if ($row['Field'] == $field) { // parse 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; } /** * 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 string 'true' or 'false' if the given var is boolean. * If the input is another type, it is not changed. * * @param mixed $var * @return mixed */ function boolean_to_string($var) { if (is_bool($var)) { return $var ? 'true' : 'false'; } else { return $var; } } function pwg_db_get_recent_period_expression($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('.$date.')'; } /** * Returns (or send to standard output) the message concerning the * error occured for the last mysql query. */ function my_error($header, $die) { global $mysqli; $error = "[mysql error ".$mysqli->errno.'] '.$mysqli->error."\n"; $error .= $header; if ($die) { fatal_error($error); } echo("<pre>"); trigger_error($error, E_USER_WARNING); echo("</pre>"); } /** * Builds an data array from a SQL query. * Depending on $key_name and $value_name it can return : * * - an array of arrays of all fields (key=null, value=null) * array( * array('id'=>1, 'name'=>'DSC8956', ...), * array('id'=>2, 'name'=>'DSC8957', ...), * ... * ) * * - an array of a single field (key=null, value='...') * array('DSC8956', 'DSC8957', ...) * * - an associative array of array of all fields (key='...', value=null) * array( * 'DSC8956' => array('id'=>1, 'name'=>'DSC8956', ...), * 'DSC8957' => array('id'=>2, 'name'=>'DSC8957', ...), * ... * ) * * - an associative array of a single field (key='...', value='...') * array( * 'DSC8956' => 1, * 'DSC8957' => 2, * ... * ) * * @since 2.6 * * @param string $query * @param string $key_name * @param string $value_name * @return array */ function query2array($query, $key_name=null, $value_name=null) { $result = pwg_query($query); $data = array(); if (isset($key_name)) { if (isset($value_name)) { while ($row = $result->fetch_assoc()) $data[ $row[$key_name] ] = $row[$value_name]; } else { while ($row = $result->fetch_assoc()) $data[ $row[$key_name] ] = $row; } } else { if (isset($value_name)) { while ($row = $result->fetch_assoc()) $data[] = $row[$value_name]; } else { while ($row = $result->fetch_assoc()) $data[] = $row; } } return $data; } ?>