Ryzom
/
ryzom-core
1
1
Fork 0
Code Issues 38 Pull Requests Projects 1 Releases 1 Activity

Re-use the database connection

Browse Source
hg/feature/cdb-packed
kaetemi 11 years ago
parent dfc65485ec
commit afe03367d9
1 changed files with 261 additions and 268 deletions
Show Stats Download Patch File Download Diff File

477
code/web/private_php/ams/autoload/dblayer.php
Unescape Escape View File

@ -5,270 +5,263 @@
* *
* --> First create an object of dblayer --> $db = new DBLayer('short database name used in config') * --> First create an object of dblayer --> $db = new DBLayer('short database name used in config')
* *
* --> Insert --> $db->insert( $tb_name, $data ) * --> Insert --> $db->insert( $tb_name, $data )
* $tb_name = table name in which we want to insert data * $tb_name = table name in which we want to insert data
* $data = array of data that needs to be inserted in format('fieldname' => $value) where fieldname must be a field in that table. * $data = array of data that needs to be inserted in format('fieldname' => $value) where fieldname must be a field in that table.
* *
* --> select --> $db->select( $tb_name, $data, $where ) * --> select --> $db->select( $tb_name, $data, $where )
* $tb_name = table name which we want to select * $tb_name = table name which we want to select
* $data = array of data which is then required in WHERE clause in format array('fieldname'=>$value) fieldname must be a field in that table. * $data = array of data which is then required in WHERE clause in format array('fieldname'=>$value) fieldname must be a field in that table.
* $where = string in format ('fieldname=:fieldname') where :fieldname takes it's value from $data array. * $where = string in format ('fieldname=:fieldname') where :fieldname takes it's value from $data array.
* *
* --> update --> $db->update( $tb_name, $data, $where ) * --> update --> $db->update( $tb_name, $data, $where )
* $tb_name = table name which we want to update * $tb_name = table name which we want to update
* $data = array of data which contains the filelds that need to be updated with their values in the format('fieldname' => $value,...) where fieldname must be a field in that table. * $data = array of data which contains the filelds that need to be updated with their values in the format('fieldname' => $value,...) where fieldname must be a field in that table.
* $where = string contains the filename with a value at that field in the format ('fieldname = $value') where fieldname must be a field in that table and $value is value respect to that field. * $where = string contains the filename with a value at that field in the format ('fieldname = $value') where fieldname must be a field in that table and $value is value respect to that field.
* *
* --> delete --> $db->delete( $tb_name, $data, $where ) * --> delete --> $db->delete( $tb_name, $data, $where )
* $tb_name = table name where we want to delete. * $tb_name = table name where we want to delete.
* $data = array of data which is then required in WHERE clause in format array('fieldname'=> $value) where fieldname must be a field in that table. * $data = array of data which is then required in WHERE clause in format array('fieldname'=> $value) where fieldname must be a field in that table.
* $where = string in format ('fieldname=:fieldname') where :fieldname takes it's value from $data array. * $where = string in format ('fieldname=:fieldname') where :fieldname takes it's value from $data array.
* *
* *
* @author Daan Janssens, mentored by Matthew Lagoe * @author Daan Janssens, mentored by Matthew Lagoe
* *
*/ */
class DBLayer {
private $PDO;
/**
* The PDO object, instantiated by the constructor
*/
/** $PDOCache = array();
* The constructor.
* Instantiates the PDO object attribute by connecting to the arguments matching database(the db info is stored in the $cfg global var)
*
* @param $db String, the name of the databases entry in the $cfg global var.
* @param $dbn String, the name of the databases entry in the $cfg global var if $db referenced to an action(install etc).
*/
function __construct( $db, $dbn = null )
{
if ( $db != "install" ) {
global $cfg; class DBLayer {
$dsn = "mysql:";
$dsn .= "host=" . $cfg['db'][$db]['host'] . ";";
$dsn .= "dbname=" . $cfg['db'][$db]['name'] . ";";
$dsn .= "port=" . $cfg['db'][$db]['port'] . ";";
$opt = array( private $PDO;
PDO :: ATTR_ERRMODE => PDO :: ERRMODE_EXCEPTION, /**
PDO :: ATTR_DEFAULT_FETCH_MODE => PDO :: FETCH_ASSOC * The PDO object, instantiated by the constructor
); */
$this -> PDO = new PDO( $dsn, $cfg['db'][$db]['user'], $cfg['db'][$db]['pass'], $opt );
} else {
global $cfg;
$dsn = "mysql:";
$dsn .= "host=" . $cfg['db'][$dbn]['host'] . ";";
$dsn .= "port=" . $cfg['db'][$dbn]['port'] . ";";
$opt = array( /**
PDO :: ATTR_ERRMODE => PDO :: ERRMODE_EXCEPTION, * The constructor.
PDO :: ATTR_DEFAULT_FETCH_MODE => PDO :: FETCH_ASSOC * Instantiates the PDO object attribute by connecting to the arguments matching database(the db info is stored in the $cfg global var)
); *
$this -> PDO = new PDO( $dsn, $_POST['Username'], $_POST['Password'], $opt ); * @param $db String, the name of the databases entry in the $cfg global var.
} * @param $dbn String, the name of the databases entry in the $cfg global var if $db referenced to an action(install etc).
*/
function __construct($db, $dbn = null)
{
global $PDOCache;
if (isset($PDOCache[$db])) {
$this->PDO = $PDOCache[$db];
} else {
global $cfg;
$dsn = "mysql:";
$dsn .= "host=" . $cfg['db'][$db]['host'] . ";";
$dsn .= "dbname=" . $cfg['db'][$db]['name'] . ";";
$dsn .= "port=" . $cfg['db'][$db]['port'] . ";";
} $opt = array(
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC
);
$this->PDO = new PDO($dsn, $cfg['db'][$db]['user'], $cfg['db'][$db]['pass'], $opt);
$PDOCache[$db] = $this->PDO;
}
}
/** /**
* Execute a query that doesn't have any parameters. * Execute a query that doesn't have any parameters.
* *
* @param $query the mysql query. * @param $query the mysql query.
* @return returns a PDOStatement object. * @return returns a PDOStatement object.
*/ */
public function executeWithoutParams( $query ) { public function executeWithoutParams($query) {
$statement = $this -> PDO -> prepare( $query ); $statement = $this->PDO->prepare($query);
$statement -> execute(); $statement->execute();
return $statement; return $statement;
} }
/** /**
* Execute a query that has parameters. * Execute a query that has parameters.
* *
* @param $query the mysql query. * @param $query the mysql query.
* @param $params the parameters that are being used by the query. * @param $params the parameters that are being used by the query.
* @return returns a PDOStatement object. * @return returns a PDOStatement object.
*/ */
public function execute( $query, $params ) { public function execute( $query, $params ) {
$statement = $this -> PDO -> prepare( $query ); $statement = $this -> PDO -> prepare( $query );
$statement -> execute( $params ); $statement -> execute( $params );
return $statement; return $statement;
} }
/** /**
* Insert function which returns id of the inserting field. * Insert function which returns id of the inserting field.
* *
* @param $tb_name table name where we want to insert data. * @param $tb_name table name where we want to insert data.
* @param $data the parameters that are being inserted into table. * @param $data the parameters that are being inserted into table.
* @return returns the id of the last inserted element. * @return returns the id of the last inserted element.
*/ */
public function executeReturnId( $tb_name, $data ) { public function executeReturnId( $tb_name, $data ) {
$field_values = ':' . implode( ',:', array_keys( $data ) ); $field_values = ':' . implode( ',:', array_keys( $data ) );
$field_options = implode( ',', array_keys( $data ) ); $field_options = implode( ',', array_keys( $data ) );
try { try {
$sth = $this -> PDO -> prepare( "INSERT INTO $tb_name ($field_options) VALUE ($field_values)" ); $sth = $this -> PDO -> prepare( "INSERT INTO $tb_name ($field_options) VALUE ($field_values)" );
foreach ( $data as $key => $value ) foreach ( $data as $key => $value )
{ {
$sth -> bindValue( ":$key", $value ); $sth -> bindValue( ":$key", $value );
} }
$this -> PDO -> beginTransaction(); $this -> PDO -> beginTransaction();
$sth -> execute(); $sth -> execute();
$lastId = $this -> PDO -> lastInsertId(); $lastId = $this -> PDO -> lastInsertId();
$this -> PDO -> commit(); $this -> PDO -> commit();
} }
catch ( Exception $e ) catch ( Exception $e )
{ {
// for rolling back the changes during transaction // for rolling back the changes during transaction
$this -> PDO -> rollBack(); $this -> PDO -> rollBack();
throw new Exception( "error in inseting" ); throw new Exception( "error in inseting" );
} }
return $lastId; return $lastId;
} }
/** /**
* Select function using prepared statement. * Select function using prepared statement.
* For selecting particular fields. * For selecting particular fields.
* *
* @param string $param field to select, can be multiple fields. * @param string $param field to select, can be multiple fields.
* @param string $tb_name Table Name to Select. * @param string $tb_name Table Name to Select.
* @param array $data array of data to be used in WHERE clause in format('fieldname'=>$value). 'fieldname' must be a field in that table. * @param array $data array of data to be used in WHERE clause in format('fieldname'=>$value). 'fieldname' must be a field in that table.
* @param string $where where to select. * @param string $where where to select.
* @return statement object. * @return statement object.
*/ */
public function selectWithParameter( $param, $tb_name, $data, $where ) public function selectWithParameter( $param, $tb_name, $data, $where )
{ {
try { try {
$sth = $this -> PDO -> prepare( "SELECT $param FROM $tb_name WHERE $where" ); $sth = $this -> PDO -> prepare( "SELECT $param FROM $tb_name WHERE $where" );
$this -> PDO -> beginTransaction(); $this -> PDO -> beginTransaction();
$sth -> execute( $data ); $sth -> execute( $data );
$this -> PDO -> commit(); $this -> PDO -> commit();
} }
catch( Exception $e ) catch ( Exception $e ) {
{ $this -> PDO -> rollBack();
$this -> PDO -> rollBack(); throw new Exception( "error selection" );
throw new Exception( "error selection" ); return false;
return false; }
} return $sth;
return $sth; }
}
/** /**
* Select function using prepared statement. * Select function using prepared statement.
* For selecting all fields in a table. * For selecting all fields in a table.
* *
* @param string $tb_name Table Name to Select. * @param string $tb_name Table Name to Select.
* @param array $data array of data to be used with WHERE part in format('fieldname'=>$value,...). 'fieldname' must be a field in that table. * @param array $data array of data to be used with WHERE part in format('fieldname'=>$value,...). 'fieldname' must be a field in that table.
* @param string $where where to select in format('fieldname=:fieldname' AND ...). * @param string $where where to select in format('fieldname=:fieldname' AND ...).
* @return statement object. * @return statement object.
*/ */
public function select( $tb_name, $data , $where ) public function select( $tb_name, $data , $where )
{ {
try { try {
$sth = $this -> PDO -> prepare( "SELECT * FROM $tb_name WHERE $where" ); $sth = $this -> PDO -> prepare( "SELECT * FROM $tb_name WHERE $where" );
$this -> PDO -> beginTransaction(); $this -> PDO -> beginTransaction();
$sth -> execute( $data ); $sth -> execute( $data );
$this -> PDO -> commit(); $this -> PDO -> commit();
} }
catch( Exception $e ) catch( Exception $e )
{ {
$this -> PDO -> rollBack(); $this -> PDO -> rollBack();
throw new Exception( "error selection" ); throw new Exception( "error selection" );
return false; return false;
} }
return $sth; return $sth;
} }
/** /**
* Update function with prepared statement. * Update function with prepared statement.
* *
* @param string $tb_name name of the table on which operation to be performed. * @param string $tb_name name of the table on which operation to be performed.
* @param array $data array of data in format('fieldname' => $value,...).Here, only those fields must be stored which needs to be updated. * @param array $data array of data in format('fieldname' => $value,...).Here, only those fields must be stored which needs to be updated.
* @param string $where where part in format ('fieldname'= $value AND ...). 'fieldname' must be a field in that table. * @param string $where where part in format ('fieldname'= $value AND ...). 'fieldname' must be a field in that table.
* @throws Exception error in updating. * @throws Exception error in updating.
*/ */
public function update( $tb_name, $data, $where ) public function update( $tb_name, $data, $where )
{ {
$field_option_values = null; $field_option_values = null;
foreach ( $data as $key => $value ) foreach ( $data as $key => $value )
{ {
$field_option_values .= ",$key" . '=:' . $key; $field_option_values .= ",$key" . '=:' . $key;
} }
$field_option_values = ltrim( $field_option_values, ',' ); $field_option_values = ltrim( $field_option_values, ',' );
try { try {
$sth = $this -> PDO -> prepare( "UPDATE $tb_name SET $field_option_values WHERE $where " ); $sth = $this -> PDO -> prepare( "UPDATE $tb_name SET $field_option_values WHERE $where " );
foreach ( $data as $key => $value ) foreach ( $data as $key => $value )
{ {
$sth -> bindValue( ":$key", $value ); $sth -> bindValue( ":$key", $value );
} }
$this -> PDO -> beginTransaction(); $this -> PDO -> beginTransaction();
$sth -> execute(); $sth -> execute();
$this -> PDO -> commit(); $this -> PDO -> commit();
} }
catch ( Exception $e ) catch ( Exception $e )
{ {
$this -> PDO -> rollBack(); $this -> PDO -> rollBack();
throw new Exception( 'error in updating' ); throw new Exception( 'error in updating' );
return false; return false;
} }
return true; return true;
} }
/** /**
* insert function using prepared statements. * insert function using prepared statements.
* *
* @param string $tb_name Name of the table on which operation to be performed. * @param string $tb_name Name of the table on which operation to be performed.
* @param array $data array of data to insert in format('fieldname' => $value,....). 'fieldname' must be a field in that table. * @param array $data array of data to insert in format('fieldname' => $value,....). 'fieldname' must be a field in that table.
* @throws error in inserting. * @throws error in inserting.
*/ */
public function insert( $tb_name, $data ) public function insert( $tb_name, $data )
{ {
$field_values = ':' . implode( ',:', array_keys( $data ) ); $field_values = ':' . implode( ',:', array_keys( $data ) );
$field_options = implode( ',', array_keys( $data ) ); $field_options = implode( ',', array_keys( $data ) );
try { try {
$sth = $this -> PDO -> prepare( "INSERT INTO $tb_name ($field_options) VALUE ($field_values)" ); $sth = $this -> PDO -> prepare( "INSERT INTO $tb_name ($field_options) VALUE ($field_values)" );
foreach ( $data as $key => $value ) foreach ( $data as $key => $value )
{ {
$sth -> bindValue( ":$key", $value ); $sth -> bindValue( ":$key", $value );
} }
$this -> PDO -> beginTransaction(); $this -> PDO -> beginTransaction();
// execution // execution
$sth -> execute(); $sth -> execute();
$this -> PDO -> commit(); $this -> PDO -> commit();
} }
catch ( Exception $e ) catch ( Exception $e )
{ {
// for rolling back the changes during transaction // for rolling back the changes during transaction
$this -> PDO -> rollBack(); $this -> PDO -> rollBack();
throw new Exception( "error in inserting" ); throw new Exception( "error in inserting" );
} }
} }
/** /**
* Delete database entery using prepared statement. * Delete database entery using prepared statement.
* *
* @param string $tb_name table name on which operations to be performed. * @param string $tb_name table name on which operations to be performed.
* @param $data array with values in the format('fieldname'=> $value,...). 'fieldname' must be a field in that table. * @param $data array with values in the format('fieldname'=> $value,...). 'fieldname' must be a field in that table.
* @param string $where condition based on $data array in the format('fieldname=:fieldname' AND ...). * @param string $where condition based on $data array in the format('fieldname=:fieldname' AND ...).
* @throws error in deleting. * @throws error in deleting.
*/ */
public function delete( $tb_name, $data, $where ) public function delete( $tb_name, $data, $where )
{ {
try { try {
$sth = $this -> PDO -> prepare( "DELETE FROM $tb_name WHERE $where" ); $sth = $this -> PDO -> prepare( "DELETE FROM $tb_name WHERE $where" );
$this -> PDO -> beginTransaction(); $this -> PDO -> beginTransaction();
$sth -> execute( $data ); $sth -> execute( $data );
$this -> PDO -> commit(); $this -> PDO -> commit();
} }
catch ( Exception $e ) catch ( Exception $e )
{ {
$this -> PDO -> rollBack(); $this -> PDO -> rollBack();
throw new Exception( "error in deleting" ); throw new Exception( "error in deleting" );
} }
} }
} }

Write Preview
Loading…
Cancel
Save