(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)
pg_send_query — Sends asynchronous query
pg_send_query() sends a query or queries asynchronously to the connection. Unlike pg_query(), it can send multiple queries at once to PostgreSQL and get the results one by one using pg_get_result().
Script execution is not blocked while the queries are executing. Use pg_connection_busy() to check if the connection is busy (i.e. the query is executing). Queries may be cancelled using 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.
connectionAn PgSql\Connection instance.
queryThe SQL statement or statements to be executed.
Data inside the query should be properly escaped.
Returns true on success, false or 0 on failure. Use pg_get_result() to determine the query result.
| Versión | Descripción |
|---|---|
| 8.1.0 | The connection parameter expects an PgSql\Connection instance now; previously, a recurso was expected. |
Ejemplo #1 pg_send_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";
$res2 = pg_get_result($dbconn);
echo "Second call to pg_get_result(): $res2\n";
$rows2 = pg_num_rows($res2);
echo "$res2 has $rows2 records\n";
?>El resultado del ejemplo sería:
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