create a .db file instead of temporary table (sqlite and pdo)

<?php // RAY_sqlite_example.php
error_reporting(E_ALL);
echo '<pre>';


// USE SQLITE
// REF: http://www.sqlite.org/about.html
// WHY: http://www.sqlite.org/mostdeployed.html



// SET UP OUR PHP DATA OBJECT USING SQLITE
$db_name = 'SqLite.db';
$db_drvr = 'sqlite';
try
{
    $pdo = new PDO("$db_drvr:$db_name");
}
catch(PDOException $e)
{
    var_dump($e);

}


// SET PDO TO TELL US ABOUT WARNINGS OR TO THROW EXCEPTIONS
$pdo->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_WARNING );
$pdo->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION );


// SHOW THE (RATHER SPARSE) PDO OBJECT
echo "PDO OBJECT: ";
var_dump($pdo);
echo PHP_EOL;



// A QUERY TO CREATE A TABLE http://www.sqlite.org/datatype3.html
$sql
=
"
CREATE TEMPORARY TABLE stock
( symbol TEXT
, price  REAL
, xtime  TEXT
, key    INTEGER PRIMARY KEY AUTOINCREMENT
)
"
;
// RUN QUERY TO CREATE THE TABLE
try
{
    $pdos = $pdo->query($sql);
}
catch(PDOException $exc)
{
    var_dump($exc);
    trigger_error($exc->getMessage(), E_USER_ERROR);
}
// SHOW THE RESULTS OF THE QUERY
var_dump($pdos);



// PREPARE THE QUERY WITH NAMED PLACEHOLDERS THAT MATCH PHP ARRAY KEYS
$sql
=
"
INSERT INTO stock
(  symbol,  price ) VALUES
( :symbol, :price )
"
;
// THIS PREPARES THE QUERY (ONLY NEEDED ONCE)
try
{
    $sth = $pdo->prepare($sql);
}
catch(PDOException $exc)
{
    var_dump($exc);
}
// SHOW THE PREPARED STATEMENT HANDLE
var_dump($sth);



// SOME TEST DATA FOR OUR STOCK TABLE
$names = array
( array( ':symbol' => 'YHOO', ':price' =>   41.07 )
, array( ':symbol' => 'GOOG', ':price' => 1148.62 )
, array( ':symbol' => 'AAPL', ':price' =>  557.36 )
, array( ':symbol' => 'JCP',  ':price' =>    6.92 )
)
;
// LOADING OUR ARRAYS OF TEST DATA INTO THE TABLE
foreach ($names as $name)
{
    // USE THE ARRAY OF KEYWORD => VALUE TO ATTACH symbol AND price
    try
    {
        // RUN THE QUERY TO INSERT THE ROW
        $sth->execute($name);
    }
    catch(PDOException $exc)
    {
        var_dump($exc);
        trigger_error($exc->getMessage(), E_USER_ERROR);
    }

    // GET THE SQLITE AUTOINCREMENT ID OF THE RECORD JUST INSERTED
    $rowid  = $pdo->lastInsertId();
    echo "PDO INSERTED A ROW CONTAINING <b>" . $name[':symbol'] . ' ' . $name[':price']. "</b> WITH AUTO_INCREMENT ID = $rowid" . PHP_EOL;
}



// A QUERY TO RETRIEVE INFORMATION FROM THE TABLE
$sql
=
"
SELECT rowid, symbol, price FROM stock WHERE price > :value LIMIT 3
"
;
// PREPARES THE QUERY
try
{
    $sth = $pdo->prepare($sql);
}
catch(PDOException $exc)
{
    var_dump($exc);
}
// SHOW THE PREPARED STATEMENT HANDLE
var_dump($sth);

// USE ARRAY OF KEYWORD => VALUE TO ATTACH QUERY PARAMS
$parms = array( ':value' => 500 );
try
{
    // RUN THE QUERY TO SELECT THE ROWS
    $sth->execute($parms);
}
catch(PDOException $exc)
{
    var_dump($exc);
    trigger_error($exc->getMessage(), E_USER_ERROR);
}

// RETRIEVE THE RESULTS IN THE FORM OF ANONYMOUS OBJECTS
while ($obj = $sth->fetch(PDO::FETCH_OBJ))
{
    print_r($obj);
}



// A QUERY TO REMOVE INFORMATION FROM THE TABLE
$sql
=
"
DELETE FROM stock WHERE price < :value
"
;
// PREPARES THE QUERY
try
{
    $sth = $pdo->prepare($sql);
}
catch(PDOException $exc)
{
    var_dump($exc);
}
// SHOW THE PREPARED STATEMENT HANDLE
var_dump($sth);

// USE ARRAY OF KEYWORD => VALUE TO ATTACH QUERY PARAMS
$parms = array( ':value' => 500 );
try
{
    // RUN THE QUERY TO DELETE THE ROWS
    $sth->execute($parms);
}
catch(PDOException $exc)
{
    var_dump($exc);
    trigger_error($exc->getMessage(), E_USER_ERROR);
}



// A QUERY TO SHOW THE INFORMATION LEFT IN THE TABLE
$sql
=
"
SELECT rowid, symbol, price FROM stock ORDER BY symbol
"
;
// PREPARES THE QUERY
try
{
    $sth = $pdo->prepare($sql);
}
catch(PDOException $exc)
{
    var_dump($exc);
}
// SHOW THE PREPARED STATEMENT HANDLE
var_dump($sth);

try
{
    // RUN THE QUERY TO SELECT THE ROWS (NO PARAMS NEEDED HERE)
    $sth->execute();
}
catch(PDOException $exc)
{
    var_dump($exc);
    trigger_error($exc->getMessage(), E_USER_ERROR);
}

// RETRIEVE THE RESULTS IN THE FORM OF ANONYMOUS OBJECTS
while ($obj = $sth->fetch(PDO::FETCH_OBJ))
{
    print_r($obj);
}



// A QUERY TO CAUSE AN ERROR AND SHOW THE EXCEPTION OBJECT
$sql = "SELECT oopsie FROM stock ORDER BY symbol";
// PREPARES THE QUERY
try
{
    $sth = $pdo->prepare($sql);
}
catch(PDOException $exc)
{
    var_dump($exc);
}
// SHOW THAT THE PREPARED STATEMENT HANDLE IS MEANINGLESS AFTER THE EXCEPTION
var_dump($sth);

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