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# pg_query

(PHP 4 >= 4.2.0)

pg_query -- Execute a query

## Description

resource pg_query ( resource connection, string query)

pg_query() returns a query result resource if query could be executed. 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_last_error() sends an SQL statement to the PostgreSQL database specified by the `connection` resource. 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 a optional parameter for pg_query(). 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.

> Note: This function used to be called `pg_exec()`. `pg_exec()` is still available for compatibility reasons but users are encouraged to use the newer name.

See also pg_connect(), pg_pconnect(), pg_fetch_array(), pg_fetch_object(), pg_num_rows(), and pg_affected_rows().

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