pg_cancel_query

(PHP 4 >= 4.2.0, PHP 5, PHP 7)

Cancel an asynchronous query

bool pg_cancel_query ( resource $connection )

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().

Parameters:

connection

PostgreSQL database connection resource.

Returns:

Returns TRUE on success or FALSE on failure.

Examples:

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