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# DBWrapper - Version 1.4
This script is a simple wrapper for SQLite3, MySQL and PgSQL, for make possible to use different BD systems without changing the functions.
## Avalible functions:
* To connect
```php
//$server is location in SQLite3
resource dbw_connect (string $tdb,string $server[,string $database, string $user,string $password]);
```
* To close
```php
//Closes connection
bool dbw_close (resource $conn);
```
* Queries
```php
//Does a query
mixed dbw_query (resource $conn, string $query);
//This does a multiquery without returning nothing. Its used for load from a file/script
bool dbw_multi_query(resource $conn, string $multiquery);
//Fetch a row. ($typearray optional, see below)
array dbw_fetch_array (resource $conn,resource $result[, string $typearray]);
//This do a query and fetch array, all in one function($typearray optional, see below)
array dbw_query_fetch_array (resource $conn,string $query[, string $typearray]);
```
* Using result of a query
```php
//Wrappers of dbw_fetch_array with row or assoc arguments
array dbw_fetch_row(resource $conn,resource $result);
array dbw_fetch_assoc(resource $conn,resource $result);
//Goto X result of a query. If row is not specified, will be first row, 0
bool array dbw_query_goto(resource $conn,resource $result[,int $row]) ;
//Return number of results of a query
int dbw_num_rows(resource $conn, resource $result);
```
* Without a query
```php
// Escapes conflictive chars for inserting into database
string dbw_escape_string(resource $conn,string $string);
//Returns last insert ID
int dbw_last_id(resource $conn);
//Alias of dbw_last_id
int dbw_insert_id(resource $conn);
```
* Important details
```
$tdb (Type of database) can be:
-mysql/mysqli -> MySQL or MariaDB
-sqlite/sqlite3 -> Sqlite3
-PostgreSQL/PgSQL/pg -> PostgreSQL
$conn is the connection stablished in dbw_connect (ie. $conn = dbw_connect('sqlite','file.sqlite'))
$typearray is the form of array is returned, and not writed is default:
-ASSOC -> Associative indexes
-NUM -> Numeric indexes
-BOTH -> (Default) Both types of indexes
```

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<?php
/* DBWrapper.php - Version 1.4
This script is a simple wrapper for SQLite3, MySQL and PgSQL,
for make possible to use different BD systems without changing the functions.
For use, in dbw_connect you have to specify type of database (see below)
Avaiable functions:
dbw_connect ($tdb,$server,$database,$user,$password) -> some values are optional,
except $tdb and $server. $server is location in SQLite3
dbw_close ($conn) -> Closes connection
dbw_query ($conn,$query) -> Does a query
dbw_multi_query($conn,$multiquery) -> This does a multiquery without returning nothing.
Its used for load from a file/script
dbw_query_fetch_array ($conn,$query[,$typearray]) -> This do a query and fetch array, all in one function
($typearray optional, see below)
--After here, this functions works with result of a query--
dbw_fetch_array ($conn,$result[,$typearray]) -> Fetch a row. ($typearray optional, see below)
dbw_escape_string($conn,$string) -> Escapes conflictive chars for inserting into database
dbw_fetch_row and dbw_fetch_assoc ($conn,$result) -> Wrappers of dbw_fetch_array with row or assoc arguments
dbw_query_goto($conn,$result[,$row]) -> Goto X result of a query. If row is not specified, will be first row, 0
dbw_num_rows($conn,$result) -> Return number of results of a query
--This doesnt need a query--
dbw_last_id($conn) -> Returns last insert ID
dbw_insert_id($conn) -> Alias of dbw_last_id
$tdb (Type of database) can be:
-mysql/mysqli -> MySQL or MariaDB
-sqlite/sqlite3 -> Sqlite3
-PostgreSQL/PgSQL/pg -> PostgreSQL
$conn is the connection stablished in dbw_connect (ie. $conn = dbw_connect('sqlite','file.sqlite'))
$typearray is the form of array is returned, and not writed is default:
-ASSOC -> Associative indexes
-NUM -> Numeric indexes
-BOTH -> (Default) Both types of indexes
*/
/** Connect with database */
function dbw_connect($tdb,$server,$database=NULL,$user = NULL,$password=NULL){
switch ($tdb){
case "mysql":
case "mysqli":
$return[0] = mysqli_connect($server,$user,$password,$database) or die("Error de conexion");
$return[1] = "mysqli"; //Return standard mysqli for other funcs.
break;
case "sqlite":
case "sqlite3":
$return[0] = new SQLite3($server);
if (!$return[0]) die ("Error de conexion");
$return[1] = "sqlite"; //Return standard SQLite3 for other funcs.
break;
case "PostgreSQL":
case "pg":
case "PgSQL":
$return[0] = pg_connect("host=$server dbname=$database user=$user password=$password") or die ('Error de conexion: ' . pg_last_error());
$return[1] = "PgSQL"; //Return standard PgSQL for other funcs.
break;
default:
return false;
break;
}
return $return;
}
/** Escapes conflictive chars for inserting into database */
function dbw_escape_string($conn,$string){
switch ($conn[1]){
case "mysqli":
return mysqli_escape_string($conn[0],$string);
case "sqlite":
return SQLite3::escapeString($string);
case "PgSQL":
return pg_escape_string($string);
}
}
/** Make query */
function dbw_query($conn,$query){
switch ($conn[1]){
case "mysqli":
return mysqli_query($conn[0],$query);
break;
case "sqlite":
return $conn[0]->query($query);
break;
case "PgSQL":
return pg_query($query); //Last error (pg_last_error()) not implemented
break;
default:
return false;
break;
}
}
/** Fetch array from query */
function dbw_fetch_array($conn,$result,$typearray = NULL){
if ($result == false || $result == NULL){return false;}
switch ($conn[1]){
case "mysqli":
if ($typearray == NULL || $typearray == "BOTH"){return mysqli_fetch_array($result);}
if ($typearray == "ASSOC"){return mysqli_fetch_array($result,MYSQLI_ASSOC);}
if ($typearray == "NUM"){return mysqli_fetch_array($result,MYSQLI_NUM);}
break;
case "sqlite":
if ($typearray == NULL || $typearray == "BOTH"){return $result->fetchArray();}
if ($typearray == "ASSOC"){return $result->fetchArray(SQLITE3_ASSOC);}
if ($typearray == "NUM"){return $result->fetchArray(SQLITE3_NUM);}
break;
case "PgSQL":
if ($typearray == NULL || $typearray == "BOTH"){return pg_fetch_array($result);}
if ($typearray == "ASSOC"){return pg_fetch_array($result,NULL,PGSQL_ASSOC);}
if ($typearray == "NUM"){return pg_fetch_array($result,NULL,PGSQL_NUM);}
break;
default:
return false;
break;
}
}
/** Make query and fetch array */
function dbw_query_fetch_array($conn,$query){
switch ($conn[1]){
case "mysqli":
$query = mysqli_query($conn[0],$query);
if ($query == false || $query == NULL){return false;}
return mysqli_fetch_array($query);
break;
case "sqlite":
$query = $conn[0]->query($query);
if ($query == false || $query == NULL){return false;}
return $query->fetchArray();
break;
case "PgSQL":
$query = pg_query($query);
if ($query == false || $query == NULL){return false;}
return pg_fetch_array($query); //Last error (pg_last_error()) not implemented
break;
}
}
/** Goes a query to $row. $row starts in 0 as first row as if not specified */
function dbw_query_goto($conn,$result,$row = 0){
switch ($conn[1]){
case "mysqli":
mysqli_data_seek($result,$row);
break;
case "sqlite":
$result->reset();
$count = 0;
while ($count != $row){
$result->fetchArray();
}
break;
case "PgSQL":
pg_result_seek($result, $row);
break;
}
}
/** Does multiple querys in one command */
function dbw_multi_query($conn,$query){
switch ($conn[1]){
case "mysqli":
mysqli_multi_query($conn[0],$query);
break;
case "sqlite":
$conn[0]->exec($query);
break;
case "PgSQL":
die ("No soportado aun"); // TODO
break;
}
}
/** Returns the lastest Insert ID */
function dbw_last_id($conn){
switch ($conn[1]){
case "mysqli":
return mysqli_insert_id($conn[0]);
break;
case "sqlite":
return $conn[0]->lastInsertRowID();
break;
case "PgSQL":
return pg_fetch_array(pg_query("SELECT lastval();"))[0];
break;
}
}
/** Returns number of results */
function dbw_num_rows($conn,$result){
switch ($conn[1]){
case "mysqli":
return mysqli_num_rows($result);
break;
case "sqlite":
die ("No soportado aun"); // TODO
break;
case "PgSQL":
die ("No soportado aun"); // TODO
break;
}
}
/** Close connection */
function dbw_close($conn){
switch ($conn[1]){
case "mysqli":
mysqli_close($conn[0]);
break;
case "sqlite":
$conn[0]->close();
break;
case "PgSQL":
pg_close($conn[0]);
break;
}
}
/** Some internal wrappers for functions that are equal to other with arguments */
function dbw_fetch_assoc($conn,$result){return dbw_fetch_array($conn,$result,"ASSOC");}
function dbw_fetch_row($conn,$result){return dbw_fetch_array($conn,$result,"NUM");}
function dbw_insert_id($conn){return dbw_last_id($conn);}
?>