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-rw-r--r--include/dblayer/mysqli.php385
1 files changed, 385 insertions, 0 deletions
diff --git a/include/dblayer/mysqli.php b/include/dblayer/mysqli.php
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+++ b/include/dblayer/mysqli.php
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+<?php
+
+/**
+ * Copyright (C) 2008-2012 FluxBB
+ * based on code by Rickard Andersson copyright (C) 2002-2008 PunBB
+ * License: http://www.gnu.org/licenses/gpl.html GPL version 2 or higher
+ */
+
+// Make sure we have built in support for MySQL
+if (!function_exists('mysqli_connect'))
+ exit('This PHP environment doesn\'t have Improved MySQL (mysqli) support built in. Improved MySQL support is required if you want to use a MySQL 4.1 (or later) database to run this forum. Consult the PHP documentation for further assistance.');
+
+
+class DBLayer
+{
+ var $prefix;
+ var $link_id;
+ var $query_result;
+
+ var $saved_queries = array();
+ var $num_queries = 0;
+
+ var $error_no = false;
+ var $error_msg = 'Unknown';
+
+ var $datatype_transformations = array(
+ '%^SERIAL$%' => 'INT(10) UNSIGNED AUTO_INCREMENT'
+ );
+
+
+ function __construct($db_host, $db_username, $db_password, $db_name, $db_prefix, $p_connect)
+ {
+ $this->prefix = $db_prefix;
+
+ // Was a custom port supplied with $db_host?
+ if (strpos($db_host, ':') !== false)
+ list($db_host, $db_port) = explode(':', $db_host);
+
+ // Persistent connection in MySQLi are only available in PHP 5.3 and later releases
+ $p_connect = $p_connect && version_compare(PHP_VERSION, '5.3.0', '>=') ? 'p:' : '';
+
+ if (isset($db_port))
+ $this->link_id = @mysqli_connect($p_connect.$db_host, $db_username, $db_password, $db_name, $db_port);
+ else
+ $this->link_id = @mysqli_connect($p_connect.$db_host, $db_username, $db_password, $db_name);
+
+ if (!$this->link_id)
+ error('Unable to connect to MySQL and select database. MySQL reported: '.mysqli_connect_error(), __FILE__, __LINE__);
+
+ // Setup the client-server character set (UTF-8)
+ if (!defined('FORUM_NO_SET_NAMES'))
+ $this->set_names('utf8');
+
+ return $this->link_id;
+ }
+
+
+ function DBLayer($db_host, $db_username, $db_password, $db_name, $db_prefix, $p_connect)
+ {
+ $this->__construct($db_host, $db_username, $db_password, $db_name, $db_prefix, $p_connect);
+ }
+
+
+ function start_transaction()
+ {
+ return;
+ }
+
+
+ function end_transaction()
+ {
+ return;
+ }
+
+
+ function query($sql, $unbuffered = false)
+ {
+ if (defined('PUN_SHOW_QUERIES'))
+ $q_start = get_microtime();
+
+ $this->query_result = @mysqli_query($this->link_id, $sql);
+
+ if ($this->query_result)
+ {
+ if (defined('PUN_SHOW_QUERIES'))
+ $this->saved_queries[] = array($sql, sprintf('%.5F', get_microtime() - $q_start));
+
+ ++$this->num_queries;
+
+ return $this->query_result;
+ }
+ else
+ {
+ if (defined('PUN_SHOW_QUERIES'))
+ $this->saved_queries[] = array($sql, 0);
+
+ $this->error_no = @mysqli_errno($this->link_id);
+ $this->error_msg = @mysqli_error($this->link_id);
+
+ return false;
+ }
+ }
+
+
+ function result($query_id = 0, $row = 0, $col = 0)
+ {
+ if ($query_id)
+ {
+ if ($row !== 0 && @mysqli_data_seek($query_id, $row) === false)
+ return false;
+
+ $cur_row = @mysqli_fetch_row($query_id);
+ if ($cur_row === false)
+ return false;
+
+ return $cur_row[$col];
+ }
+ else
+ return false;
+ }
+
+
+ function fetch_assoc($query_id = 0)
+ {
+ return ($query_id) ? @mysqli_fetch_assoc($query_id) : false;
+ }
+
+
+ function fetch_row($query_id = 0)
+ {
+ return ($query_id) ? @mysqli_fetch_row($query_id) : false;
+ }
+
+
+ function num_rows($query_id = 0)
+ {
+ return ($query_id) ? @mysqli_num_rows($query_id) : false;
+ }
+
+
+ function affected_rows()
+ {
+ return ($this->link_id) ? @mysqli_affected_rows($this->link_id) : false;
+ }
+
+
+ function insert_id()
+ {
+ return ($this->link_id) ? @mysqli_insert_id($this->link_id) : false;
+ }
+
+
+ function get_num_queries()
+ {
+ return $this->num_queries;
+ }
+
+
+ function get_saved_queries()
+ {
+ return $this->saved_queries;
+ }
+
+
+ function free_result($query_id = false)
+ {
+ return ($query_id) ? @mysqli_free_result($query_id) : false;
+ }
+
+
+ function escape($str)
+ {
+ return is_array($str) ? '' : mysqli_real_escape_string($this->link_id, $str);
+ }
+
+
+ function error()
+ {
+ $result['error_sql'] = @current(@end($this->saved_queries));
+ $result['error_no'] = $this->error_no;
+ $result['error_msg'] = $this->error_msg;
+
+ return $result;
+ }
+
+
+ function close()
+ {
+ if ($this->link_id)
+ {
+ if ($this->query_result instanceof mysqli_result)
+ @mysqli_free_result($this->query_result);
+
+ return @mysqli_close($this->link_id);
+ }
+ else
+ return false;
+ }
+
+
+ function get_names()
+ {
+ $result = $this->query('SHOW VARIABLES LIKE \'character_set_connection\'');
+ return $this->result($result, 0, 1);
+ }
+
+
+ function set_names($names)
+ {
+ return $this->query('SET NAMES \''.$this->escape($names).'\'');
+ }
+
+
+ function get_version()
+ {
+ $result = $this->query('SELECT VERSION()');
+
+ return array(
+ 'name' => 'MySQL Improved',
+ 'version' => preg_replace('%^([^-]+).*$%', '\\1', $this->result($result))
+ );
+ }
+
+
+ function table_exists($table_name, $no_prefix = false)
+ {
+ $result = $this->query('SHOW TABLES LIKE \''.($no_prefix ? '' : $this->prefix).$this->escape($table_name).'\'');
+ return $this->num_rows($result) > 0;
+ }
+
+
+ function field_exists($table_name, $field_name, $no_prefix = false)
+ {
+ $result = $this->query('SHOW COLUMNS FROM '.($no_prefix ? '' : $this->prefix).$table_name.' LIKE \''.$this->escape($field_name).'\'');
+ return $this->num_rows($result) > 0;
+ }
+
+
+ function index_exists($table_name, $index_name, $no_prefix = false)
+ {
+ $exists = false;
+
+ $result = $this->query('SHOW INDEX FROM '.($no_prefix ? '' : $this->prefix).$table_name);
+ while ($cur_index = $this->fetch_assoc($result))
+ {
+ if (strtolower($cur_index['Key_name']) == strtolower(($no_prefix ? '' : $this->prefix).$table_name.'_'.$index_name))
+ {
+ $exists = true;
+ break;
+ }
+ }
+
+ return $exists;
+ }
+
+
+ function create_table($table_name, $schema, $no_prefix = false)
+ {
+ if ($this->table_exists($table_name, $no_prefix))
+ return true;
+
+ $query = 'CREATE TABLE '.($no_prefix ? '' : $this->prefix).$table_name." (\n";
+
+ // Go through every schema element and add it to the query
+ foreach ($schema['FIELDS'] as $field_name => $field_data)
+ {
+ $field_data['datatype'] = preg_replace(array_keys($this->datatype_transformations), array_values($this->datatype_transformations), $field_data['datatype']);
+
+ $query .= $field_name.' '.$field_data['datatype'];
+
+ if (isset($field_data['collation']))
+ $query .= 'CHARACTER SET utf8 COLLATE utf8_'.$field_data['collation'];
+
+ if (!$field_data['allow_null'])
+ $query .= ' NOT NULL';
+
+ if (isset($field_data['default']))
+ $query .= ' DEFAULT '.$field_data['default'];
+
+ $query .= ",\n";
+ }
+
+ // If we have a primary key, add it
+ if (isset($schema['PRIMARY KEY']))
+ $query .= 'PRIMARY KEY ('.implode(',', $schema['PRIMARY KEY']).'),'."\n";
+
+ // Add unique keys
+ if (isset($schema['UNIQUE KEYS']))
+ {
+ foreach ($schema['UNIQUE KEYS'] as $key_name => $key_fields)
+ $query .= 'UNIQUE KEY '.($no_prefix ? '' : $this->prefix).$table_name.'_'.$key_name.'('.implode(',', $key_fields).'),'."\n";
+ }
+
+ // Add indexes
+ if (isset($schema['INDEXES']))
+ {
+ foreach ($schema['INDEXES'] as $index_name => $index_fields)
+ $query .= 'KEY '.($no_prefix ? '' : $this->prefix).$table_name.'_'.$index_name.'('.implode(',', $index_fields).'),'."\n";
+ }
+
+ // We remove the last two characters (a newline and a comma) and add on the ending
+ $query = substr($query, 0, strlen($query) - 2)."\n".') ENGINE = '.(isset($schema['ENGINE']) ? $schema['ENGINE'] : 'MyISAM').' CHARACTER SET utf8';
+
+ return $this->query($query) ? true : false;
+ }
+
+
+ function drop_table($table_name, $no_prefix = false)
+ {
+ if (!$this->table_exists($table_name, $no_prefix))
+ return true;
+
+ return $this->query('DROP TABLE '.($no_prefix ? '' : $this->prefix).$table_name) ? true : false;
+ }
+
+
+ function rename_table($old_table, $new_table, $no_prefix = false)
+ {
+ // If the new table exists and the old one doesn't, then we're happy
+ if ($this->table_exists($new_table, $no_prefix) && !$this->table_exists($old_table, $no_prefix))
+ return true;
+
+ return $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$old_table.' RENAME TO '.($no_prefix ? '' : $this->prefix).$new_table) ? true : false;
+ }
+
+
+ function add_field($table_name, $field_name, $field_type, $allow_null, $default_value = null, $after_field = null, $no_prefix = false)
+ {
+ if ($this->field_exists($table_name, $field_name, $no_prefix))
+ return true;
+
+ $field_type = preg_replace(array_keys($this->datatype_transformations), array_values($this->datatype_transformations), $field_type);
+
+ if (!is_null($default_value) && !is_int($default_value) && !is_float($default_value))
+ $default_value = '\''.$this->escape($default_value).'\'';
+
+ return $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' ADD '.$field_name.' '.$field_type.($allow_null ? '' : ' NOT NULL').(!is_null($default_value) ? ' DEFAULT '.$default_value : '').(!is_null($after_field) ? ' AFTER '.$after_field : '')) ? true : false;
+ }
+
+
+ function alter_field($table_name, $field_name, $field_type, $allow_null, $default_value = null, $after_field = null, $no_prefix = false)
+ {
+ if (!$this->field_exists($table_name, $field_name, $no_prefix))
+ return true;
+
+ $field_type = preg_replace(array_keys($this->datatype_transformations), array_values($this->datatype_transformations), $field_type);
+
+ if (!is_null($default_value) && !is_int($default_value) && !is_float($default_value))
+ $default_value = '\''.$this->escape($default_value).'\'';
+
+ return $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' MODIFY '.$field_name.' '.$field_type.($allow_null ? '' : ' NOT NULL').(!is_null($default_value) ? ' DEFAULT '.$default_value : '').(!is_null($after_field) ? ' AFTER '.$after_field : '')) ? true : false;
+ }
+
+
+ function drop_field($table_name, $field_name, $no_prefix = false)
+ {
+ if (!$this->field_exists($table_name, $field_name, $no_prefix))
+ return true;
+
+ return $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' DROP '.$field_name) ? true : false;
+ }
+
+
+ function add_index($table_name, $index_name, $index_fields, $unique = false, $no_prefix = false)
+ {
+ if ($this->index_exists($table_name, $index_name, $no_prefix))
+ return true;
+
+ return $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' ADD '.($unique ? 'UNIQUE ' : '').'INDEX '.($no_prefix ? '' : $this->prefix).$table_name.'_'.$index_name.' ('.implode(',', $index_fields).')') ? true : false;
+ }
+
+
+ function drop_index($table_name, $index_name, $no_prefix = false)
+ {
+ if (!$this->index_exists($table_name, $index_name, $no_prefix))
+ return true;
+
+ return $this->query('ALTER TABLE '.($no_prefix ? '' : $this->prefix).$table_name.' DROP INDEX '.($no_prefix ? '' : $this->prefix).$table_name.'_'.$index_name) ? true : false;
+ }
+
+ function truncate_table($table_name, $no_prefix = false)
+ {
+ return $this->query('TRUNCATE TABLE '.($no_prefix ? '' : $this->prefix).$table_name) ? true : false;
+ }
+}