on win 32
the error "malformed database schema - unable to open a temporary database file for storing temporary tables" may happen if the temp and tmp env vars are typed like this : %WINDIR/Temp
Replace by C:/Windows/Temp and the error will disappear.
SQLite Functions
Clases predefinidas
SQLiteDatabase
Represents an opened SQLite database.
Constructor
-
__construct - construct a new SQLiteDatabase object
Métodos
-
query - Execute a query
-
queryExec - Execute a result-less query
-
arrayQuery - Execute a query and return the result as an array
-
singleQuery - Execute a query and return either an array for one single column or the value of the first row
-
unbufferedQuery - Execute an unbuffered query
-
lastInsertRowid - Returns the rowid of the most recently inserted row
-
changes - Returns the number of rows changed by the most recent statement
-
createAggregate - Register an aggregating UDF for use in SQL statements
-
createFunction - Register a UDF for use in SQL statements
-
busyTimeout - Sets or disables busy timeout duration
-
lastError - Returns the last error code of the most recently encountered error
-
fetchColumnTypes - Return an array of column types from a particular table
SQLiteResult
Represents a buffered SQLite result set.
Métodos
-
fetch - Fetches the next row from the result set as an array
-
fetchObject - Fetches the next row from the result set as an object
-
fetchSingle - Fetches the first column from the result set as a string
-
fetchAll - Fetches all rows from the result set as an array of arrays
-
column - Fetches a column from the current row of the result set
-
numFields - Returns the number of fields in the result set
-
fieldName - Returns the name of a particular field in the result set
-
current - Fetches the current row from the result set as an array
-
key - Return the current row index
-
next - Seek to the next row number
-
valid - Returns whether more rows are available
-
rewind - Seek to the first row number of the result set
-
prev - Seek to the previous row number of the result set
-
hasPrev - Returns whether or not a previous row is available
-
numRows - Returns the number of rows in the result set
-
seek - Seek to a particular row number
SQLiteUnbuffered
Represents an unbuffered SQLite result set. Unbuffered results sets are sequential, forward-seeking only.
Métodos
-
fetch - Fetches the next row from the result set as an array
-
fetchObject - Fetches the next row from the result set as an object
-
fetchSingle - Fetches the first column from the result set as a string
-
fetchAll - Fetches all rows from the result set as an array of arrays
-
column - Fetches a column from the current row of the result set
-
numFields - Returns the number of fields in the result set
-
fieldName - Returns the name of a particular field in the result set
-
current - Fetches the current row from the result set as an array
-
next - Seek to the next row number
-
valid - Returns whether more rows are available
Table of Contents
- sqlite_array_query — Ejecuta una consulta contra una base de datos y devuelve el resultado en forma de matriz
- sqlite_busy_timeout — Establece la duración del temporizador de ocupado o deshabilita los temporizadores
- sqlite_changes — Devuelve el número de filas que se han modificado en la última sentencia SQL
- sqlite_close — Cierra una base de datos SQLite abierta
- sqlite_column — Obtiene una columna de la fila actual del resultado
- sqlite_create_aggregate — Registra una FDU (función definida por el usuario) de grupo normal para su uso en sentencias SQL
- sqlite_create_function — Registra una FDU (función definida por el usuario) normal para su uso en sentencias SQL
- sqlite_current — Obtiene la fila actual del resultado en forma de matriz
- sqlite_error_string — Devuelve la descripción del error producido a partir de un código de error
- sqlite_escape_string — Escapa una cadena de texto para poder usarla como parámetro en una consulta
- sqlite_exec — Ejecuta una consulta que no produce resultado
- sqlite_factory — Abre una base de datos SQLite y devuelve un objeto SQLiteDatabase
- sqlite_fetch_all — Obtiene todas las filas del resultado en forma de matriz de matrices
- sqlite_fetch_array — Obtiene la siguiente fila del resultado en forma de matriz
- sqlite_fetch_column_types — Obtiene una matriz con los tipos de las columnas de una tabla
- sqlite_fetch_object — Obtiene la siguiente fila del resultado en forma de objeto
- sqlite_fetch_single — Obtiene la primera columna del resultado en forma de cadena
- sqlite_fetch_string — Alias of sqlite_fetch_single
- sqlite_field_name — Obtiene el nombre de un campo
- sqlite_has_more — Indica si existen más filas disponibles
- sqlite_has_prev — Indica si está disponible una fila anterior
- sqlite_key — Devuelve el índice de la fila actual
- sqlite_last_error — Devuelve el código de error del último error producido en la base de datos
- sqlite_last_insert_rowid — Devuelve el identificador de fila de la última fila insertada
- sqlite_libencoding — Devuelve la codificación de la librería SQLite que se está empleando
- sqlite_libversion — Devuelve la versión de la librería SQLite que se está empleando
- sqlite_next — Se desplaza hasta el siguiente número de fila
- sqlite_num_fields — Obtiene el número de campos de un resultado
- sqlite_num_rows — Obtiene el número de filas de un resultado almacenado (buffered)
- sqlite_open — Abre una base de datos de SQLite y la crea si no existía
- sqlite_popen — Abre una base de datos de SQLite de forma persistente y la crea si no existía
- sqlite_prev — Se desplaza hasta el anterior número de fila
- sqlite_query — Ejecuta una consulta sobre la base de datos y devuelve un manejador del resultado
- sqlite_rewind — Se desplaza hasta el primer número de fila
- sqlite_seek — Se desplaza hasta un determinado número de fila de un resultado almacenado (buffered)
- sqlite_single_query — Ejecuta una consulta y devuelve o una matriz para una columna o el valor de la primera fila
- sqlite_udf_decode_binary — Decodifica los datos binarios que se pasan como parámetro a las funciones FDU (función definida por el usuario)
- sqlite_udf_encode_binary — Codifica los datos binarios antes de devolverlos de una FDU (función definida por el usuario)
- sqlite_unbuffered_query — Ejecuta una consulta sobre la base de datos cuyo resultado no almacena todos los datos devueltos
- sqlite_valid — Indica si hay más filas disponibles en el resultado
SQLite Functions
11-Oct-2006 12:19
02-Jun-2006 06:05
If you get an error message:
Warning: sqlite_open() [function.sqlite-open]: file is encrypted or is not a database
then most probably your code is accessing a SQLite3 database.
sqlite_open() only supports SQLite2. Use PDO to access SQLite3.
10-May-2006 07:05
The correct url for the windows dll is:
http://pecl4win.php.net/ext.php/php_sqlite.dll
22-Feb-2006 02:15
<$php
public function set_by_db_with_join_to_users_department($col, $foo){
$list = "da.ROWID, da.dept_id, da.script, da.action, da.description, ud.name";
$query = "SELECT $list FROM dept_access AS da, users_department AS ud
WHERE da.dept_id = ud.ROWID
AND da.$col = '$foo';";
$db = new SQLiteDatabase (dept_access::db_path, 0666, &$error)
or die("Failed: $error");
$db->queryExec("ATTACH DATABASE '".dept_access::db_users_path."' AS users");
$row = $db->arrayQuery($query, SQLITE_ASSOC);
unset($db);
echo $query."\n";
echo var_dump($row);
$this->ROWID = $row[0]['da.ROWID'];
$this->dept_id = $row[0]['da.dept_id'];
$this->dept_name = $row[0]['ud.name'];
$this->script = $row[0]['da.script'];
$this->action = $row[0]['da.action'];
$this->description = $row[0]['da.description'];
}
?>
For ATTACH DATABASE to work you need to run it in a $db->queryExec(ATTACH DATABASE...); before using $db->arrayQuery. This is most likly the case with other OO methods to. This on stumped me for a while.
11-Nov-2005 06:53
Simple Example for using SQLite for small Buffering Clipboard ;)
<?php
// $Id: SQLiteClipboard.php5,v 1.1 2005/09/09 10:15:26 heinemann Exp $
/**
* @callgraph
* @class SQLiteClipboard
* @short Simple Read/Write Clipboard Class
* @version 0.0.1
* @since Fr Sep 9 08:14:45 CEST 2005
* @code
$sqlite = new SQLiteClipboard( MY_TEMP_DIR );
if ( $sqlite->INSERTING = time() )
var_dump( $sqlite->INSERTING );
else
echo "Nothing done!";
* @endcode
*/
final class SQLiteClipboard
{
private $SQL;
private $DB = "Clipboard.sqlite";
private $TB = "Clipboard";
private $ID = "ID";
private $PA = "PARAM";
private $VA = "VAL";
function __construct( $path )
{
$this->DB = chop( $path . "/" . $this->DB );
$this->sql_init();
}
private function sql_init()
{
$this->SQL = new SQLiteDatabase( $this->DB, 0660 );
if ( ! file_exists( $this->DB ) )
die( "Permission Denied!" );
$q = $this->SQL->query("PRAGMA table_info(" . $this->TB . ")");
if ( $q->numRows() == 0 ) {
$this->SQL->query( "CREATE TABLE " . $this->TB . " ( " . $this->ID . " INTEGER PRIMARY KEY, " . $this->PA . " CHAR(255), " . $this->VA . " CHAR(255) );" );
}
}
private function sql_check( $p )
{
$o = null;
$q = $this->SQL->query( "SELECT " . $this->ID . " FROM " . $this->TB . " WHERE ( " . $this->PA . "='$p' ) ORDER BY " . $this->ID . " LIMIT 1" );
while( $q->valid() ) {
$r = $q->current();
return $r[$this->ID];
$q->next();
}
return false;
}
public function __get( $p )
{
$q = $this->SQL->query( "SELECT " . $this->VA . " FROM " . $this->TB . " WHERE ( " . $this->PA . "='$p' ) ORDER BY " . $this->ID );
while( $q->valid() ) {
$r = $q->current();
$o = $r[$this->VA];
$q->next();
}
return $o;
}
public function __set( $p, $v )
{
if ( $this->sql_check( $p ) && ! empty( $v ) )
return $this->SQL->query( "UPDATE " . $this->TB . " SET " . $this->VA . "='$v' WHERE ( " . $this->PA . "='$p' );" );
elseif ( ! $this->sql_check( $p ) && ! empty( $v ) )
return $this->SQL->query( "INSERT INTO " . $this->TB . " ( " . $this->PA . ", " . $this->VA . " ) VALUES ('$p', '$v' );" );
elseif ( $this->sql_check( $p ) && empty( $v ) )
return $this->SQL->query( "DELETE FROM " . $this->TB . " WHERE ( " . $this->PA . "='$p' );" );
else
return false;
}
} // end Class
?>
A function to check whether a table exists:
<?php
function sqlite_table_exists(&$sqlite, $table)
{
$result = $sqlite->query("SELECT name FROM sqlite_master WHERE type='table' AND name='$table'");
return $result->numRows() > 0;
}
?>
14-Jul-2005 08:37
Sqlite by default allows for foreign keys, but doesn't enforce them.
I found a nice article on how to enforce foreign keys at http://www.justatheory.com/computers/databases/sqlite/
It would be nice if this could be handled with a wrapper class, so that adding foreign keys is done thru a wrapper API to automate the generation of the necessary enforcement triggers. If nobody's done this by the time I start coding against SqlLite/PHP5 in 6-12 months, I'll write one myself, possibly by modifying "jon at jenseng dot com"s alter table wrapper
Anyway, it's not PHP specific, but anybody using Sqlite really should know this!
30-Jun-2005 02:58
I think it would be good to point out that currently (as of 5.0.4) this extention does not support SQLite 3 databases.
So if your getting an error message like:
Error: file is encrypted or is not a database
That is why.
18-Apr-2005 04:30
SELECT tablename.columnname FROM table;
will cause SQLite to return an array having tablename.field_name as the array index. (e.g. $result['tablename.field_name'])
To let SQLite return an array having only field_name as the array index (e.g. $result['field_name']) you can issue a 'PRAGMA short_column_names = 1' query:
sqlite_query($connection_id, 'PRAGMA short_column_names = 1');
This behaviour is more consistent with the other database extensions.
For a full list of all pragmas visit: http://sqlite.org/pragma.html
10-Feb-2005 03:03
This may have been obvious to others, but I had a tough time finding the info.
The default location for the actual database file is the same location of the php doc that created the database. You can alter this behavior by specifying the full path in the creation call:
<php
$db = sqlite_open("/absolute/path/my_sqlite.db");
?>
Note that if you used the default location, the db file may be served up by the webserver if it is in a the http document path. This is obviously a security risk that should be avoided.
//Max
16-Jan-2005 05:42
Check the db/table if exist
$db_name='db';
$db=new SQLiteDatabase($db_name, 0666, $error);
if ($error) exit($error);
$q=$db->query("PRAGMA table_info(test)");
if ($q->numRows()!=2) {
if (!@$db->queryexec("
CREATE TABLE test (
id INTEGER NOT NULL PRIMARY KEY,
text VARCHAR ( 255 ) NOT NULL
)")
) exit ("Create SQLite Database Error\n");
}
16-Nov-2004 04:24
The same in 3 lines.
<?php
function sqlite_table_exists($db,$mytable) {
/* counts the tables that match the name given */
$result = sqlite_query($db,"SELECT COUNT(*) FROM sqlite_master WHERE type='table' AND name='$mytable'");
/* casts into integer */
$count = intval(sqlite_fetch_single($result));
/* returns true or false */
return $count > 0;
}
?>
29-Oct-2004 12:41
the OO version.
<?php
function sqlite_table_exists($db,$mytable) {
// ask the database kindly what tables is has.
$result = $db->query("SELECT name FROM sqlite_master WHERE type='table'");
$tables = $result->fetchAll();
// if there's no items in the array then our taget is not going to exists.
if (count($tables) == 0) {
return FALSE ;
}
// loop over the tables to see if there's a table we're looking for.
foreach ($tables as $table) {
if ($table['name'] == $mytable) {
return(TRUE);
}
}
// there was no such table, informe the user the bad news.
return(FALSE);
}
?>
22-Oct-2004 03:26
If you need to check if a table exists, you can use a function like this:
<?php
//Returns TRUE if table exists and FALSE otherwise
// $mytable = table you want to check for
function sqlite_table_exists($mytable) {
$db = sqlite_open('mydb.sqlite', 0666, $sqliteerror);
$query = sqlite_query($db, "SELECT name FROM sqlite_master WHERE type='table'");
$tables = sqlite_fetch_array($query);
if ($tables != '') {
foreach ($tables as $table) {
if ($table == $mytable) {
return("TRUE");
}
else {
return("FALSE");
}
}
}
else {
return("FALSE");
}
}
?>
A function like this could be used to create the table if it's not already created, etc.
19-Oct-2004 12:18
If you want to create a table in your database which should have an integer primary key, you cannot declare the row like this:
id int(16) primary key
or
id integer(16) primary key
When you declare it like this it could be that the id isn't auto increment. You have to declare it like this:
id integer primary key
10-Sep-2004 08:39
I've written a short article about the (lack of) use of SQLite in-memory databases: http://www.filipdewaard.com/21_SQLite_inmemory_databases.html . Hopefully it will help somebody out there ;)
08-Aug-2004 11:59
20-Jul-2004 11:50
Since SQLite doesn't support ALTER TABLE statements or renaming tables, modifying an existing table is a bit cumbersome. You have to:
1. create a temporary table
2. copy the original table into the temporary table
3. delete the original
4. recreate the original with new column definitions
5. copy the contents back
6. delete the temporary table
As this is rather unwieldy, I've created a wrapper class that allows for ALTER TABLE queries and does the dirty work for you. It has integrated error handling to ensure that queries are completely valid and it allows for complex statements such as:
ALTER TABLE foo ADD bar VARCHAR(27), DROP bar2, CHANGE bar3 foobar INTEGER, ADD bar4 DATE
Documentation:
http://code.jenseng.com/db/
Source:
http://code.jenseng.com/db/sql.txt
15-Jul-2004 03:29
You can use the PECL SQLite extension as a static (built into the executable) PHP module with PHP 4. Download the extension tarball and extract it. Move it to ext/sqlite in the PHP source directory. Delete configure and run buildconf.
Example below. Change version numbers as appropriate:
$ tar -xzvf php-4.3.8.tar.gz
$ tar -xzvf SQLite-1.0.2.tgz
$ mv SQLite-1.0.2 php-4.3.8/ext/sqlite
$ cd php-4.3.8
$ rm configure
$ ./buildconf --force
If everything worked, then you should now be able to build PHP with SQLite support:
$ ./configure --help | grep sqlite
--with-sqlite Include sqlite support
I think this method will work for other PECL extensions.
PHP5 compile time option --enable-sqlite-utf8
See the note about buggy utf-8 support http://uk.php.net/manual/en/function.sqlite-libencoding.php
14-Apr-2004 05:16
If you want to get the list of all the columns in a table (and associated information), PRAGMA is helpful (see http://sqlite.org/lang.html#pragma for details):
if (!($db=@sqlite_open("delme.db",0666,$sqliteerror))) die("Can't open database");
@sqlite_query ($db, 'DROP TABLE foo;');
sqlite_query($db, "CREATE TABLE foo (bar INTEGER PRIMARY KEY, baz VARCHAR(5));");
$aTableStruct = sqlite_array_query($db, "PRAGMA table_info('foo');", SQLITE_ASSOC);
for ($i=0,$aNames=array();$i<sizeof($aTableStruct);++$i)
$aNames[]=$aTableStruct[$i]['name'];
var_dump ($aNames); // => ['bar', 'baz']
Note also that if you want to use more than one database in the same connection using "ATTACH DATABASE ..." then you should supply the complete database filename.
Csaba Gabor
31-Mar-2004 07:30
To elaborate on vpupkin at comcast dot net's post about the INSERT query problem, you will be unable to execute any manipulation queries (INSERT/UPDATE/DELETE/ect) on the SQLite database file unless the directory the SQLite database file resides in is writable by the webserver.
The reason for this is because SQLite needs to write a lock file to the hard drive. After a processes finishes writting, it deletes the lock file. Other processes check for the lock file before writting to the SQLite database file and if present, delay writting until the lock file is no longer present.
14-Feb-2004 03:22
For those looking for a function similar to mysql_list_tables, here you have:
if (! function_exists ('sqlite_list_tables')) {
function sqlite_list_tables (&$dblink) {
$tables = array ();
$sql = "SELECT name FROM sqlite_master WHERE (type = 'table')";
if ($res = sqlite_query ($dblink, $sql)) {
while (sqlite_has_more($res)) {
$tables[] = sqlite_fetch_single($res);
}
}
return $tables;
}
}
And a related funtion, to test if a given table exists:
if (! function_exists ('sqlite_table_exists')) {
function sqlite_table_exists (&$dblink, $table) {
$sql = "SELECT count(name) FROM sqlite_master WHERE ((type = 'table') and (name = '$table'))";
if ($res = sqlite_query ($dblink, $sql)) {
return sqlite_fetch_single($res) > 0;
} else {
return false; // or throw exception
}
}
}
Of course it would be preferable to have these functions included in the library, to avoid potential changes internal to SQLite; but we'll have to stick to this method until then.
Since this extension is rather new and few tutorials/articles talk about it... here's one worthy of a link:
http://www.php-mag.net/itr/online_artikel/psecom,id,447,nodeid,114
01-Dec-2003 05:53
if you are going to send INSERT queries, you will need to make the folder, where you put your "file.db", writable by a web server user, otherwise you'll receive error message - "Unable to open database . . . ". File permissions are not enough (phpinfo - SQLite Lib 2.8.3)
22-Nov-2003 03:47
If you gone in trouble while/with installation of sqlite,
you can try the installation steps I've done at
RedHat9 with PHP4.3.4 and Apache 1.3.28
via the Linux shell:
# wget http://pecl.php.net/get/SQLite-1.0.tgz
# tar xzf SQLite-1.0.tgz
# cd sqlite
# export PHP_PREFIX="/usr"
# $PHP_PREFIX/bin/phpize
# ./configure
# make
# make install
After that add following to php.ini and restart Apache:
[sqlite]
extension="sqlite.so"
07-Nov-2003 04:19
Very nice MS PowerPoint presentation titled "SQLite and PHP" (author: Wez Furlong) can be downloaded at http://www.php.net/~wez/SQLite_and_PHP.ppt [134 KB]
HTH,
R. Rajesh Jeba Anbiah
