Retrieving Results of a Query to SQLite
$result = sqlite_query($db, 'SELECT * FROM quotes');
sqlite_fetch_array($result);
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The function sqlite_exec() from the previous phrase is very quick performing; however, it is not possible to access return values from the SQL statement sent with it. For this, sqlite_query() must be used. This function returns a handle of the resultset of the query. The following functions can then be used to iterate over the resultset:
sqlite_fetch_arrray() returns the current row in the resultset as an associative array (field names become keys) and moves farther to the next row. sqlite_fetch_object() returns the current row in the resultset as an object (field names become properties) and moves farther to the next row. sqlite_fetch_all() returns the complete resultset as an array of associative arrays.
Retrieving Data from SQLite (sqlite_fetch.php; excerpt)
<table>
<tr><th>#</th><th>Quote</th><th>Author</th><th>Year<
/th></tr>
<?php
if ($db = @sqlite_open('quotes.db', 0666, $error))
{
$result = sqlite_query($db, 'SELECT * FROM
quotes');
while ($row = sqlite_fetch_array($result)) {
printf(
'<tr><td>%s</td><td>%s</td><td>%s</td><td>%s</td></
tr>',
htmlspecialchars($row['id']),
htmlspecialchars($row['quote']),
htmlspecialchars($row['author']),
htmlspecialchars($row['year'])
);
}
sqlite_close($db);
} else {
printf('<tr><td colspan="4">Connection failed:
%s</td></tr>',
htmlspecialchars($error));
}
?>
</table>
The preceding listing shows how to access all data within the resultset using sqlite_fetch_array(). A while loop calls this function as long as it returns something other than false (which means that there is no data left).
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Using sqlite_fetch_all() reads the whole resultset into memory at once. So, if you do not have much data, this is the best-performing method. If you have more data, an iterative approach using sqlite_fetch_array() and sqlite_fetch_object() might be better. |
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