pg_cancel_query
(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)
pg_cancel_query — Cancel an asynchronous query
Description
pg_cancel_query() cancels an asynchronous query sent with pg_send_query(), pg_send_query_params() or pg_send_execute(). You cannot cancel a query executed using pg_query().
Return Values
Returns true on success or false on failure.
Changelog
| Version | Description |
|---|---|
| 8.1.0 |
The connection parameter expects an PgSql\Connection
instance now; previously, a resource was expected.
|
Examples
Example #1 pg_cancel_query() example
<?php
$dbconn = pg_connect("dbname=publisher") or die("Could not connect");
if (!pg_connection_busy($dbconn)) {
pg_send_query($dbconn, "select * from authors; select count(*) from authors;");
}
$res1 = pg_get_result($dbconn);
echo "First call to pg_get_result(): $res1\n";
$rows1 = pg_num_rows($res1);
echo "$res1 has $rows1 records\n\n";
// Cancel the currently running query. Will be the second query if it is
// still running.
pg_cancel_query($dbconn);
?>
The above example will output:
First call to pg_get_result(): Resource id #3 Resource id #3 has 3 records
See Also
- pg_send_query() - Sends asynchronous query
- pg_connection_busy() - Get connection is busy or not
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