php man page for pg_cancel_query

PG_CANCEL_QUERY(3)														PG_CANCEL_QUERY(3)

pg_cancel_query - Cancel an asynchronous query

SYNOPSIS
       bool pg_cancel_query (resource  $connection)

DESCRIPTION
       pg_cancel_query(3) cancels an asynchronous query sent with pg_send_query(3), pg_send_query_params(3) or pg_send_execute(3). You cannot can-
       cel a query executed using pg_query(3).

PARAMETERS
	      o $connection
		- PostgreSQL database connection resource.

RETURN VALUES
	Returns TRUE on success or FALSE on failure.

EXAMPLES
       Example #1

	      pg_cancel_query(3) 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
";
		$rows1 = pg_num_rows($res1);
		echo "$res1 has $rows1 records

";

		// 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(3), pg_connection_busy(3).

PHP Documentation Group 													PG_CANCEL_QUERY(3)