summaryrefslogtreecommitdiffstats
path: root/system/database
diff options
context:
space:
mode:
Diffstat (limited to 'system/database')
-rw-r--r--system/database/DB_driver.php502
1 files changed, 189 insertions, 313 deletions
diff --git a/system/database/DB_driver.php b/system/database/DB_driver.php
index 661b42ced..d9d83d55d 100644
--- a/system/database/DB_driver.php
+++ b/system/database/DB_driver.php
@@ -1,13 +1,13 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
* CodeIgniter
*
* An open source application development framework for PHP 5.1.6 or newer
*
* NOTICE OF LICENSE
- *
+ *
* Licensed under the Open Software License version 3.0
- *
+ *
* This source file is subject to the Open Software License (OSL 3.0) that is
* bundled with this package in the files license.txt / license.rst. It is
* also available through the world wide web at this URL:
@@ -25,8 +25,6 @@
* @filesource
*/
-// ------------------------------------------------------------------------
-
/**
* Database Driver Class
*
@@ -42,55 +40,52 @@
*/
class CI_DB_driver {
- var $username;
- var $password;
- var $hostname;
- var $database;
- var $dbdriver = 'mysql';
- var $dbprefix = '';
- var $char_set = 'utf8';
- var $dbcollat = 'utf8_general_ci';
- var $autoinit = TRUE; // Whether to automatically initialize the DB
- var $swap_pre = '';
- var $port = '';
- var $pconnect = FALSE;
- var $conn_id = FALSE;
- var $result_id = FALSE;
- var $db_debug = FALSE;
- var $benchmark = 0;
- var $query_count = 0;
- var $bind_marker = '?';
- var $save_queries = TRUE;
- var $queries = array();
- var $query_times = array();
- var $data_cache = array();
- var $trans_enabled = TRUE;
- var $trans_strict = TRUE;
- var $_trans_depth = 0;
- var $_trans_status = TRUE; // Used with transactions to determine if a rollback should occur
- var $cache_on = FALSE;
- var $cachedir = '';
- var $cache_autodel = FALSE;
- var $CACHE; // The cache class object
-
- // Private variables
- var $_protect_identifiers = TRUE;
- var $_reserved_identifiers = array('*'); // Identifiers that should NOT be escaped
+ public $username;
+ public $password;
+ public $hostname;
+ public $database;
+ public $dbdriver = 'mysql';
+ public $dbprefix = '';
+ public $char_set = 'utf8';
+ public $dbcollat = 'utf8_general_ci';
+ public $autoinit = TRUE; // Whether to automatically initialize the DB
+ public $swap_pre = '';
+ public $port = '';
+ public $pconnect = FALSE;
+ public $conn_id = FALSE;
+ public $result_id = FALSE;
+ public $db_debug = FALSE;
+ public $benchmark = 0;
+ public $query_count = 0;
+ public $bind_marker = '?';
+ public $save_queries = TRUE;
+ public $queries = array();
+ public $query_times = array();
+ public $data_cache = array();
+ public $trans_enabled = TRUE;
+ public $trans_strict = TRUE;
+ protected $_trans_depth = 0;
+ protected $_trans_status = TRUE; // Used with transactions to determine if a rollback should occur
+ public $cache_on = FALSE;
+ public $cachedir = '';
+ public $cache_autodel = FALSE;
+ public $CACHE; // The cache class object
+
+ protected $_protect_identifiers = TRUE;
+ protected $_reserved_identifiers = array('*'); // Identifiers that should NOT be escaped
// These are use with Oracle
- var $stmt_id;
- var $curs_id;
- var $limit_used;
-
-
+ public $stmt_id;
+ public $curs_id;
+ public $limit_used;
/**
- * Constructor. Accepts one parameter containing the database
+ * Constructor. Accepts one parameter containing the database
* connection settings.
*
* @param array
*/
- function __construct($params)
+ public function __construct($params)
{
if (is_array($params))
{
@@ -108,15 +103,17 @@ class CI_DB_driver {
/**
* Initialize Database Settings
*
- * @access private Called by the constructor
- * @param mixed
- * @return void
+ * @return bool
*/
- function initialize()
+ public function initialize()
{
- // If an existing connection resource is available
- // there is no need to connect and select the database
- if (is_resource($this->conn_id) OR is_object($this->conn_id))
+ /* If an established connection is available, then there's
+ * no need to connect and select the database.
+ *
+ * Depending on the database driver, conn_id can be either
+ * boolean TRUE, a resource or an object.
+ */
+ if ($this->conn_id)
{
return TRUE;
}
@@ -126,7 +123,7 @@ class CI_DB_driver {
// Connect to the database and set the connection ID
$this->conn_id = ($this->pconnect == FALSE) ? $this->db_connect() : $this->db_pconnect();
- // No connection resource? Check if there is a failover else throw an error
+ // No connection resource? Check if there is a failover else throw an error
if ( ! $this->conn_id)
{
// Check if there is a failover set
@@ -200,12 +197,11 @@ class CI_DB_driver {
/**
* Set client character set
*
- * @access public
* @param string
* @param string
- * @return resource
+ * @return bool
*/
- function db_set_charset($charset, $collation)
+ public function db_set_charset($charset, $collation)
{
if ( ! $this->_db_set_charset($this->char_set, $this->dbcollat))
{
@@ -227,10 +223,9 @@ class CI_DB_driver {
/**
* The name of the platform in use (mysql, mssql, etc...)
*
- * @access public
* @return string
*/
- function platform()
+ public function platform()
{
return $this->dbdriver;
}
@@ -238,21 +233,16 @@ class CI_DB_driver {
// --------------------------------------------------------------------
/**
- * Database Version Number. Returns a string containing the
+ * Database Version Number. Returns a string containing the
* version of the database being used
*
- * @access public
* @return string
*/
- function version()
+ public function version()
{
if (FALSE === ($sql = $this->_version()))
{
- if ($this->db_debug)
- {
- return $this->display_error('db_unsupported_function');
- }
- return FALSE;
+ return ($this->db_debug) ? $this->display_error('db_unsupported_function') : FALSE;
}
// Some DBs have functions that return the version, and don't run special
@@ -266,7 +256,8 @@ class CI_DB_driver {
else
{
$query = $this->query($sql);
- return $query->row('ver');
+ $query = $query->row();
+ return $query->ver;
}
}
@@ -281,42 +272,34 @@ class CI_DB_driver {
* FALSE upon failure, and if the $db_debug variable is set to TRUE
* will raise an error.
*
- * @access public
* @param string An SQL query string
* @param array An array of binding data
* @return mixed
*/
- function query($sql, $binds = FALSE, $return_object = TRUE)
+ public function query($sql, $binds = FALSE, $return_object = TRUE)
{
if ($sql == '')
{
log_message('error', 'Invalid query: '.$sql);
- if ($this->db_debug)
- {
- return $this->display_error('db_invalid_query');
- }
- return FALSE;
+ return ($this->db_debug) ? $this->display_error('db_invalid_query') : FALSE;
}
// Verify table prefix and replace if necessary
- if ( ($this->dbprefix != '' AND $this->swap_pre != '') AND ($this->dbprefix != $this->swap_pre) )
+ if ( ($this->dbprefix != '' && $this->swap_pre != '') && ($this->dbprefix != $this->swap_pre) )
{
- $sql = preg_replace("/(\W)".$this->swap_pre."(\S+?)/", "\\1".$this->dbprefix."\\2", $sql);
+ $sql = preg_replace('/(\W)'.$this->swap_pre.'(\S+?)/', '\\1'.$this->dbprefix.'\\2', $sql);
}
- // Is query caching enabled? If the query is a "read type"
+ // Is query caching enabled? If the query is a "read type"
// we will load the caching class and return the previously
// cached query if it exists
- if ($this->cache_on == TRUE AND stristr($sql, 'SELECT'))
+ if ($this->cache_on == TRUE && stripos($sql, 'SELECT') !== FALSE && $this->_cache_init())
{
- if ($this->_cache_init())
+ $this->load_rdriver();
+ if (FALSE !== ($cache = $this->CACHE->read($sql)))
{
- $this->load_rdriver();
- if (FALSE !== ($cache = $this->CACHE->read($sql)))
- {
- return $cache;
- }
+ return $cache;
}
}
@@ -326,7 +309,7 @@ class CI_DB_driver {
$sql = $this->compile_binds($sql, $binds);
}
- // Save the query for debugging
+ // Save the query for debugging
if ($this->save_queries == TRUE)
{
$this->queries[] = $sql;
@@ -357,19 +340,13 @@ class CI_DB_driver {
if ($this->db_debug)
{
// We call this function in order to roll-back queries
- // if transactions are enabled. If we don't call this here
+ // if transactions are enabled. If we don't call this here
// the error message will trigger an exit, causing the
// transactions to remain in limbo.
$this->trans_complete();
// Display errors
- return $this->display_error(
- array(
- 'Error Number: '.$error_no,
- $error_msg,
- $sql
- )
- );
+ return $this->display_error(array('Error Number: '.$error_no, $error_msg, $sql));
}
return FALSE;
@@ -393,7 +370,7 @@ class CI_DB_driver {
{
// If caching is enabled we'll auto-cleanup any
// existing files related to this particular URI
- if ($this->cache_on == TRUE AND $this->cache_autodel == TRUE AND $this->_cache_init())
+ if ($this->cache_on == TRUE && $this->cache_autodel == TRUE && $this->_cache_init())
{
$this->CACHE->delete();
}
@@ -410,13 +387,12 @@ class CI_DB_driver {
}
// Load and instantiate the result driver
-
- $driver = $this->load_rdriver();
- $RES = new $driver();
+ $driver = $this->load_rdriver();
+ $RES = new $driver();
$RES->conn_id = $this->conn_id;
$RES->result_id = $this->result_id;
- if ($this->dbdriver == 'oci8')
+ if ($this->dbdriver === 'oci8')
{
$RES->stmt_id = $this->stmt_id;
$RES->curs_id = NULL;
@@ -427,9 +403,9 @@ class CI_DB_driver {
// oci8 vars must be set before calling this
$RES->num_rows = $RES->num_rows();
- // Is query caching enabled? If so, we'll serialize the
+ // Is query caching enabled? If so, we'll serialize the
// result object and save it to a cache file.
- if ($this->cache_on == TRUE AND $this->_cache_init())
+ if ($this->cache_on == TRUE && $this->_cache_init())
{
// We'll create a new instance of the result object
// only without the platform specific driver since
@@ -438,9 +414,9 @@ class CI_DB_driver {
// result object, so we'll have to compile the data
// and save it)
$CR = new CI_DB_result();
- $CR->num_rows = $RES->num_rows();
$CR->result_object = $RES->result_object();
$CR->result_array = $RES->result_array();
+ $CR->num_rows = $RES->num_rows();
// Reset these since cached objects can not utilize resource IDs.
$CR->conn_id = NULL;
@@ -457,10 +433,9 @@ class CI_DB_driver {
/**
* Load the result drivers
*
- * @access public
* @return string the name of the result class
*/
- function load_rdriver()
+ public function load_rdriver()
{
$driver = 'CI_DB_'.$this->dbdriver.'_result';
@@ -477,15 +452,14 @@ class CI_DB_driver {
/**
* Simple Query
- * This is a simplified version of the query() function. Internally
+ * This is a simplified version of the query() function. Internally
* we only use it when running transaction commands since they do
* not require all the features of the main query() function.
*
- * @access public
* @param string the sql query
* @return mixed
*/
- function simple_query($sql)
+ public function simple_query($sql)
{
if ( ! $this->conn_id)
{
@@ -501,10 +475,9 @@ class CI_DB_driver {
* Disable Transactions
* This permits transactions to be disabled at run-time.
*
- * @access public
* @return void
*/
- function trans_off()
+ public function trans_off()
{
$this->trans_enabled = FALSE;
}
@@ -518,10 +491,9 @@ class CI_DB_driver {
* If strict mode is disabled, each group is treated autonomously, meaning
* a failure of one group will not affect any others
*
- * @access public
* @return void
*/
- function trans_strict($mode = TRUE)
+ public function trans_strict($mode = TRUE)
{
$this->trans_strict = is_bool($mode) ? $mode : TRUE;
}
@@ -531,10 +503,9 @@ class CI_DB_driver {
/**
* Start Transaction
*
- * @access public
* @return void
*/
- function trans_start($test_mode = FALSE)
+ public function trans_start($test_mode = FALSE)
{
if ( ! $this->trans_enabled)
{
@@ -557,10 +528,9 @@ class CI_DB_driver {
/**
* Complete Transaction
*
- * @access public
* @return bool
*/
- function trans_complete()
+ public function trans_complete()
{
if ( ! $this->trans_enabled)
{
@@ -604,10 +574,9 @@ class CI_DB_driver {
/**
* Lets you retrieve the transaction flag to determine if it has failed
*
- * @access public
* @return bool
*/
- function trans_status()
+ public function trans_status()
{
return $this->_trans_status;
}
@@ -617,12 +586,11 @@ class CI_DB_driver {
/**
* Compile Bindings
*
- * @access public
* @param string the sql statement
* @param array an array of bind data
* @return string
*/
- function compile_binds($sql, $binds)
+ public function compile_binds($sql, $binds)
{
if (strpos($sql, $this->bind_marker) === FALSE)
{
@@ -639,7 +607,8 @@ class CI_DB_driver {
// The count of bind should be 1 less then the count of segments
// If there are more bind arguments trim it down
- if (count($binds) >= count($segments)) {
+ if (count($binds) >= count($segments))
+ {
$binds = array_slice($binds, 0, count($segments)-1);
}
@@ -648,8 +617,7 @@ class CI_DB_driver {
$i = 0;
foreach ($binds as $bind)
{
- $result .= $this->escape($bind);
- $result .= $segments[++$i];
+ $result .= $this->escape($bind).$segments[++$i];
}
return $result;
@@ -660,17 +628,12 @@ class CI_DB_driver {
/**
* Determines if a query is a "write" type.
*
- * @access public
* @param string An SQL query string
- * @return boolean
+ * @return bool
*/
- function is_write_type($sql)
+ public function is_write_type($sql)
{
- if ( ! preg_match('/^\s*"?(SET|INSERT|UPDATE|DELETE|REPLACE|CREATE|DROP|TRUNCATE|LOAD DATA|COPY|ALTER|GRANT|REVOKE|LOCK|UNLOCK)\s+/i', $sql))
- {
- return FALSE;
- }
- return TRUE;
+ return (bool) preg_match('/^\s*"?(SET|INSERT|UPDATE|DELETE|REPLACE|CREATE|DROP|TRUNCATE|LOAD DATA|COPY|ALTER|GRANT|REVOKE|LOCK|UNLOCK)\s+/i', $sql);
}
// --------------------------------------------------------------------
@@ -678,11 +641,10 @@ class CI_DB_driver {
/**
* Calculate the aggregate query elapsed time
*
- * @access public
- * @param integer The number of decimal places
- * @return integer
+ * @param int The number of decimal places
+ * @return int
*/
- function elapsed_time($decimals = 6)
+ public function elapsed_time($decimals = 6)
{
return number_format($this->benchmark, $decimals);
}
@@ -692,10 +654,9 @@ class CI_DB_driver {
/**
* Returns the total number of queries
*
- * @access public
- * @return integer
+ * @return int
*/
- function total_queries()
+ public function total_queries()
{
return $this->query_count;
}
@@ -705,10 +666,9 @@ class CI_DB_driver {
/**
* Returns the last query that was executed
*
- * @access public
- * @return void
+ * @return string
*/
- function last_query()
+ public function last_query()
{
return end($this->queries);
}
@@ -721,23 +681,22 @@ class CI_DB_driver {
* Escapes data based on type
* Sets boolean and null types
*
- * @access public
* @param string
* @return mixed
*/
- function escape($str)
+ public function escape($str)
{
if (is_string($str))
{
- $str = "'".$this->escape_str($str)."'";
+ return "'".$this->escape_str($str)."'";
}
elseif (is_bool($str))
{
- $str = ($str === FALSE) ? 0 : 1;
+ return ($str === FALSE) ? 0 : 1;
}
elseif (is_null($str))
{
- $str = 'NULL';
+ return 'NULL';
}
return $str;
@@ -751,11 +710,10 @@ class CI_DB_driver {
* Calls the individual driver for platform
* specific escaping for LIKE conditions
*
- * @access public
* @param string
* @return mixed
*/
- function escape_like_str($str)
+ public function escape_like_str($str)
{
return $this->escape_str($str, TRUE);
}
@@ -765,23 +723,16 @@ class CI_DB_driver {
/**
* Primary
*
- * Retrieves the primary key. It assumes that the row in the first
+ * Retrieves the primary key. It assumes that the row in the first
* position is the primary key
*
- * @access public
* @param string the table name
* @return string
*/
- function primary($table = '')
+ public function primary($table = '')
{
$fields = $this->list_fields($table);
-
- if ( ! is_array($fields))
- {
- return FALSE;
- }
-
- return current($fields);
+ return is_array($fields) ? current($fields) : FALSE;
}
// --------------------------------------------------------------------
@@ -789,10 +740,9 @@ class CI_DB_driver {
/**
* Returns an array of table names
*
- * @access public
* @return array
*/
- function list_tables($constrain_by_prefix = FALSE)
+ public function list_tables($constrain_by_prefix = FALSE)
{
// Is there a cached result?
if (isset($this->data_cache['table_names']))
@@ -802,32 +752,17 @@ class CI_DB_driver {
if (FALSE === ($sql = $this->_list_tables($constrain_by_prefix)))
{
- if ($this->db_debug)
- {
- return $this->display_error('db_unsupported_function');
- }
- return FALSE;
+ return ($this->db_debug) ? $this->display_error('db_unsupported_function') : FALSE;
}
- $retval = array();
+ $this->data_cache['table_names'] = array();
$query = $this->query($sql);
- if ($query->num_rows() > 0)
+ foreach ($query->result_array() as $row)
{
- foreach ($query->result_array() as $row)
- {
- if (isset($row['TABLE_NAME']))
- {
- $retval[] = $row['TABLE_NAME'];
- }
- else
- {
- $retval[] = array_shift($row);
- }
- }
+ $this->data_cache['table_names'][] = isset($row['TABLE_NAME']) ? $row['TABLE_NAME'] : array_shift($row);
}
- $this->data_cache['table_names'] = $retval;
return $this->data_cache['table_names'];
}
@@ -835,12 +770,12 @@ class CI_DB_driver {
/**
* Determine if a particular table exists
- * @access public
- * @return boolean
+ *
+ * @return bool
*/
- function table_exists($table_name)
+ public function table_exists($table_name)
{
- return ( ! in_array($this->_protect_identifiers($table_name, TRUE, FALSE, FALSE), $this->list_tables())) ? FALSE : TRUE;
+ return in_array($this->_protect_identifiers($table_name, TRUE, FALSE, FALSE), $this->list_tables());
}
// --------------------------------------------------------------------
@@ -848,11 +783,10 @@ class CI_DB_driver {
/**
* Fetch MySQL Field Names
*
- * @access public
* @param string the table name
* @return array
*/
- function list_fields($table = '')
+ public function list_fields($table = '')
{
// Is there a cached result?
if (isset($this->data_cache['field_names'][$table]))
@@ -862,38 +796,22 @@ class CI_DB_driver {
if ($table == '')
{
- if ($this->db_debug)
- {
- return $this->display_error('db_field_param_missing');
- }
- return FALSE;
+ return ($this->db_debug) ? $this->display_error('db_field_param_missing') : FALSE;
}
if (FALSE === ($sql = $this->_list_columns($table)))
{
- if ($this->db_debug)
- {
- return $this->display_error('db_unsupported_function');
- }
- return FALSE;
+ return ($this->db_debug) ? $this->display_error('db_unsupported_function') : FALSE;
}
$query = $this->query($sql);
+ $this->data_cache['field_names'][$table] = array();
- $retval = array();
foreach ($query->result_array() as $row)
{
- if (isset($row['COLUMN_NAME']))
- {
- $retval[] = $row['COLUMN_NAME'];
- }
- else
- {
- $retval[] = current($row);
- }
+ $this->data_cache['field_names'][$table][] = isset($row['COLUMN_NAME']) ? $row['COLUMN_NAME'] : current($row);
}
- $this->data_cache['field_names'][$table] = $retval;
return $this->data_cache['field_names'][$table];
}
@@ -901,14 +819,14 @@ class CI_DB_driver {
/**
* Determine if a particular field exists
- * @access public
+ *
* @param string
* @param string
- * @return boolean
+ * @return bool
*/
- function field_exists($field_name, $table_name)
+ public function field_exists($field_name, $table_name)
{
- return ( ! in_array($field_name, $this->list_fields($table_name))) ? FALSE : TRUE;
+ return in_array($field_name, $this->list_fields($table_name));
}
// --------------------------------------------------------------------
@@ -916,23 +834,17 @@ class CI_DB_driver {
/**
* Returns an object with field data
*
- * @access public
* @param string the table name
- * @return object
+ * @return mixed
*/
- function field_data($table = '')
+ public function field_data($table = '')
{
if ($table == '')
{
- if ($this->db_debug)
- {
- return $this->display_error('db_field_param_missing');
- }
- return FALSE;
+ return ($this->db_debug) ? $this->display_error('db_field_param_missing') : FALSE;
}
$query = $this->query($this->_field_data($this->_protect_identifiers($table, TRUE, NULL, FALSE)));
-
return $query->field_data();
}
@@ -941,15 +853,13 @@ class CI_DB_driver {
/**
* Generate an insert string
*
- * @access public
* @param string the table upon which the query will be performed
* @param array an associative array data of key/values
* @return string
*/
- function insert_string($table, $data)
+ public function insert_string($table, $data)
{
- $fields = array();
- $values = array();
+ $fields = $values = array();
foreach ($data as $key => $val)
{
@@ -965,17 +875,16 @@ class CI_DB_driver {
/**
* Generate an update string
*
- * @access public
* @param string the table upon which the query will be performed
* @param array an associative array data of key/values
* @param mixed the "where" statement
* @return string
*/
- function update_string($table, $data, $where)
+ public function update_string($table, $data, $where)
{
if ($where == '')
{
- return false;
+ return FALSE;
}
$fields = array();
@@ -993,7 +902,7 @@ class CI_DB_driver {
$dest = array();
foreach ($where as $key => $val)
{
- $prefix = (count($dest) == 0) ? '' : ' AND ';
+ $prefix = (count($dest) === 0) ? '' : ' AND ';
$key = $this->_protect_identifiers($key);
if ($val !== '')
@@ -1018,19 +927,12 @@ class CI_DB_driver {
/**
* Tests whether the string has an SQL operator
*
- * @access private
* @param string
* @return bool
*/
- function _has_operator($str)
+ protected function _has_operator($str)
{
- $str = trim($str);
- if ( ! preg_match("/(\s|<|>|!|=|is null|is not null)/i", $str))
- {
- return FALSE;
- }
-
- return TRUE;
+ return (bool) preg_match('/(\s|<|>|!|=|is null|is not null)/i', trim($str));
}
// --------------------------------------------------------------------
@@ -1038,12 +940,11 @@ class CI_DB_driver {
/**
* Enables a native PHP function to be run, using a platform agnostic wrapper.
*
- * @access public
* @param string the function name
* @param mixed any parameters needed by the function
* @return mixed
*/
- function call_function($function)
+ public function call_function($function)
{
$driver = ($this->dbdriver == 'postgre') ? 'pg_' : $this->dbdriver.'_';
@@ -1054,25 +955,12 @@ class CI_DB_driver {
if ( ! function_exists($function))
{
- if ($this->db_debug)
- {
- return $this->display_error('db_unsupported_function');
- }
- return FALSE;
+ return ($this->db_debug) ? $this->display_error('db_unsupported_function') : FALSE;
}
- else
- {
- $args = (func_num_args() > 1) ? array_splice(func_get_args(), 1) : null;
- if (is_null($args))
- {
- return call_user_func($function);
- }
- else
- {
- return call_user_func_array($function, $args);
- }
- }
+ return (func_num_args() > 1)
+ ? call_user_func_array($function, array_splice(func_get_args(), 1))
+ : call_user_func($function);
}
// --------------------------------------------------------------------
@@ -1080,11 +968,10 @@ class CI_DB_driver {
/**
* Set Cache Directory Path
*
- * @access public
* @param string the path to the cache directory
* @return void
*/
- function cache_set_path($path = '')
+ public function cache_set_path($path = '')
{
$this->cachedir = $path;
}
@@ -1094,13 +981,11 @@ class CI_DB_driver {
/**
* Enable Query Caching
*
- * @access public
- * @return void
+ * @return bool cache_on value
*/
- function cache_on()
+ public function cache_on()
{
- $this->cache_on = TRUE;
- return TRUE;
+ return $this->cache_on = TRUE;
}
// --------------------------------------------------------------------
@@ -1108,13 +993,11 @@ class CI_DB_driver {
/**
* Disable Query Caching
*
- * @access public
- * @return void
+ * @return bool cache_on value
*/
- function cache_off()
+ public function cache_off()
{
- $this->cache_on = FALSE;
- return FALSE;
+ return $this->cache_on = FALSE;
}
@@ -1123,15 +1006,15 @@ class CI_DB_driver {
/**
* Delete the cache files associated with a particular URI
*
- * @access public
- * @return void
+ * @return bool
*/
- function cache_delete($segment_one = '', $segment_two = '')
+ public function cache_delete($segment_one = '', $segment_two = '')
{
if ( ! $this->_cache_init())
{
return FALSE;
}
+
return $this->CACHE->delete($segment_one, $segment_two);
}
@@ -1140,10 +1023,9 @@ class CI_DB_driver {
/**
* Delete All cache files
*
- * @access public
- * @return void
+ * @return bool
*/
- function cache_delete_all()
+ public function cache_delete_all()
{
if ( ! $this->_cache_init())
{
@@ -1158,23 +1040,21 @@ class CI_DB_driver {
/**
* Initialize the Cache Class
*
- * @access private
* @return void
*/
- function _cache_init()
+ protected function _cache_init()
{
- if (is_object($this->CACHE) AND class_exists('CI_DB_Cache'))
+ if (class_exists('CI_DB_Cache'))
{
- return TRUE;
- }
-
- if ( ! class_exists('CI_DB_Cache'))
- {
- if ( ! @include(BASEPATH.'database/DB_cache.php'))
+ if (is_object($this->CACHE))
{
- return $this->cache_off();
+ return TRUE;
}
}
+ elseif ( ! @include_once(BASEPATH.'database/DB_cache.php'))
+ {
+ return $this->cache_off();
+ }
$this->CACHE = new CI_DB_Cache($this); // pass db object to support multiple db connections and returned db objects
return TRUE;
@@ -1185,16 +1065,15 @@ class CI_DB_driver {
/**
* Close DB Connection
*
- * @access public
* @return void
*/
- function close()
+ public function close()
{
- if (is_resource($this->conn_id) OR is_object($this->conn_id))
+ if ($this->conn_id)
{
$this->_close($this->conn_id);
+ $this->conn_id = FALSE;
}
- $this->conn_id = FALSE;
}
// --------------------------------------------------------------------
@@ -1202,13 +1081,12 @@ class CI_DB_driver {
/**
* Display an error message
*
- * @access public
* @param string the error message
* @param string any "swap" values
- * @param boolean whether to localize the message
+ * @param bool whether to localize the message
* @return string sends the application/error_db.php template
*/
- function display_error($error = '', $swap = '', $native = FALSE)
+ public function display_error($error = '', $swap = '', $native = FALSE)
{
$LANG =& load_class('Lang', 'core');
$LANG->load('db');
@@ -1227,9 +1105,7 @@ class CI_DB_driver {
// Find the most likely culprit of the error by going through
// the backtrace until the source file is no longer in the
// database folder.
-
$trace = debug_backtrace();
-
foreach ($trace as $call)
{
if (isset($call['file']) && strpos($call['file'], BASEPATH.'database') === FALSE)
@@ -1237,7 +1113,6 @@ class CI_DB_driver {
// Found it - use a relative path for safety
$message[] = 'Filename: '.str_replace(array(BASEPATH, APPPATH), '', $call['file']);
$message[] = 'Line Number: '.$call['line'];
-
break;
}
}
@@ -1254,11 +1129,10 @@ class CI_DB_driver {
*
* This function adds backticks if appropriate based on db type
*
- * @access private
* @param mixed the item to escape
* @return mixed the item with backticks
*/
- function protect_identifiers($item, $prefix_single = FALSE)
+ public function protect_identifiers($item, $prefix_single = FALSE)
{
return $this->_protect_identifiers($item, $prefix_single);
}
@@ -1271,8 +1145,8 @@ class CI_DB_driver {
* This function is used extensively by the Active Record class, and by
* a couple functions in this class.
* It takes a column or table name (optionally with an alias) and inserts
- * the table prefix onto it. Some logic is necessary in order to deal with
- * column names that include the path. Consider a query like this:
+ * the table prefix onto it. Some logic is necessary in order to deal with
+ * column names that include the path. Consider a query like this:
*
* SELECT * FROM hostname.database.table.column AS c FROM hostname.database.table
*
@@ -1285,14 +1159,16 @@ class CI_DB_driver {
* insert the table prefix (if it exists) in the proper position, and escape only
* the correct identifiers.
*
- * @access private
+ * NOTE: This is used by DB_forge drivers and therefore needs to be public.
+ * (until a better solution is implemented)
+ *
* @param string
* @param bool
* @param mixed
* @param bool
* @return string
*/
- function _protect_identifiers($item, $prefix_single = FALSE, $protect_identifiers = NULL, $field_exists = TRUE)
+ public function _protect_identifiers($item, $prefix_single = FALSE, $protect_identifiers = NULL, $field_exists = TRUE)
{
if ( ! is_bool($protect_identifiers))
{
@@ -1302,7 +1178,6 @@ class CI_DB_driver {
if (is_array($item))
{
$escaped_array = array();
-
foreach ($item as $k => $v)
{
$escaped_array[$this->_protect_identifiers($k)] = $this->_protect_identifiers($v);
@@ -1316,16 +1191,19 @@ class CI_DB_driver {
// If the item has an alias declaration we remove it and set it aside.
// Basically we remove everything to the right of the first space
- $alias = '';
if (strpos($item, ' ') !== FALSE)
{
- $alias = strstr($item, " ");
+ $alias = strstr($item, ' ');
$item = substr($item, 0, - strlen($alias));
}
+ else
+ {
+ $alias = '';
+ }
// This is basically a bug fix for queries that use MAX, MIN, etc.
// If a parenthesis is found we know that we do not need to
- // escape the data or add a prefix. There's probably a more graceful
+ // escape the data or add a prefix. There's probably a more graceful
// way to deal with this, but I'm not thinking of it -- Rick
if (strpos($item, '(') !== FALSE)
{
@@ -1340,7 +1218,7 @@ class CI_DB_driver {
$parts = explode('.', $item);
// Does the first segment of the exploded item match
- // one of the aliases previously identified? If so,
+ // one of the aliases previously identified? If so,
// we have nothing more to do other than escape the item
if (in_array($parts[0], $this->ar_aliased_tables))
{
@@ -1356,10 +1234,11 @@ class CI_DB_driver {
$item = implode('.', $parts);
}
+
return $item.$alias;
}
- // Is there a table prefix defined in the config file? If not, no need to do anything
+ // Is there a table prefix defined in the config file? If not, no need to do anything
if ($this->dbprefix != '')
{
// We now add the table prefix based on some logic.
@@ -1390,13 +1269,12 @@ class CI_DB_driver {
}
// Verify table prefix and replace if necessary
- if ($this->swap_pre != '' && strncmp($parts[$i], $this->swap_pre, strlen($this->swap_pre)) === 0)
+ if ($this->swap_pre != '' && strpos($parts[$i], $this->swap_pre) === 0)
{
- $parts[$i] = preg_replace("/^".$this->swap_pre."(\S+?)/", $this->dbprefix."\\1", $parts[$i]);
+ $parts[$i] = preg_replace('/^'.$this->swap_pre.'(\S+?)/', $this->dbprefix.'\\1', $parts[$i]);
}
-
// We only add the table prefix if it does not already exist
- if (substr($parts[$i], 0, strlen($this->dbprefix)) != $this->dbprefix)
+ elseif (strpos($parts[$i], $this->dbprefix) !== 0)
{
$parts[$i] = $this->dbprefix.$parts[$i];
}
@@ -1417,19 +1295,18 @@ class CI_DB_driver {
if ($this->dbprefix != '')
{
// Verify table prefix and replace if necessary
- if ($this->swap_pre != '' && strncmp($item, $this->swap_pre, strlen($this->swap_pre)) === 0)
+ if ($this->swap_pre != '' && strpos($item, $this->swap_pre) === 0)
{
- $item = preg_replace("/^".$this->swap_pre."(\S+?)/", $this->dbprefix."\\1", $item);
+ $item = preg_replace('/^'.$this->swap_pre.'(\S+?)/', $this->dbprefix.'\\1', $item);
}
-
// Do we prefix an item with no segments?
- if ($prefix_single == TRUE AND substr($item, 0, strlen($this->dbprefix)) != $this->dbprefix)
+ elseif ($prefix_single == TRUE && strpos($item, $this->dbprefix) !== 0)
{
$item = $this->dbprefix.$item;
}
}
- if ($protect_identifiers === TRUE AND ! in_array($item, $this->_reserved_identifiers))
+ if ($protect_identifiers === TRUE && ! in_array($item, $this->_reserved_identifiers))
{
$item = $this->_escape_identifiers($item);
}
@@ -1440,6 +1317,5 @@ class CI_DB_driver {
}
-
/* End of file DB_driver.php */
/* Location: ./system/database/DB_driver.php */
generated by cgit v1.2.3-24-g4f1b (git 2.32.0) at 2024-11-14 11:20:19 +0100