pg_send_query

pg_send_query

Sends asynchronous query

 **pg_send_query** PgSql\Connection $connection string $query

sends a query or queries asynchronously to the

. Unlike , it can send multiple queries at once to PostgreSQL and get the results one by one using . pg_send_query``connection``pg_query``pg_get_result

Script execution is not blocked while the queries are executing. Use to check if the connection is busy (i.e. the query is executing). Queries may be cancelled using . pg_connection_busy``pg_cancel_query

Although the user can send multiple queries at once, multiple queries cannot be sent over a busy connection. If a query is sent while the connection is busy, it waits until the last query is finished and discards all its results.

connection``queryThe SQL statement or statements to be executed.

   Data inside the query should be .
  properly escaped

Returns true on success, false or on failure. Use to determine the query result. 0``pg_get_result

Voorbeeld: 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";
  
  $res2 = pg_get_result($dbconn);
  echo "Second call to pg_get_result(): $res2\n";
  $rows2 = pg_num_rows($res2);
  echo "$res2 has $rows2 records\n";
?>

First call to pg_get_result(): Resource id #3
Resource id #3 has 3 records

Second call to pg_get_result(): Resource id #4
Resource id #4 has 1 records

pg_query``pg_cancel_query``pg_get_result``pg_connection_busy