pg_execute() returns a query result resource if the named prepared query could be executed with the given parameters. It returns FALSE on failure or if connection is not a valid connection. Details about the error can be retrieved using the pg_last_error() function if connection is valid. pg_execute() executes a previously prepared query on the connection resource with the specified parameters. It is identical to pg_query_params() except that it takes the name of a previously prepared query instead of an actual query. The connection must be a valid connection that was returned by pg_connect() or pg_pconnect(). The return value of this function is an query result resource to be used to access the results from other PostgreSQL functions such as pg_fetch_array().
Note: connection is an optional parameter for pg_execute(). If connection is not set, default connection is used. Default connection is the last connection made by pg_connect() or pg_pconnect().
Although connection can be omitted, it is not recommended, since it could be a cause of hard to find bug in script.