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>pg_query</H1
><DIV
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><A
NAME="AEN64660"
></A
><P
> (PHP 4 >= 4.2.0)</P
>pg_query -- Execute a query</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN64663"
></A
><H2
>Description</H2
>resource <B
CLASS="methodname"
>pg_query</B
> ( resource connection, string query)<BR
></BR
><P
> <B
CLASS="function"
>pg_query()</B
> returns a query result resource if
query could be executed. It returns <TT
CLASS="constant"
><B
>FALSE</B
></TT
> on failure or if
connection is not a valid connection. Details about the error can
be retrieved using the <A
HREF="function.pg-last-error.html"
><B
CLASS="function"
>pg_last_error()</B
></A
>
function if connection is valid.
<A
HREF="function.pg-last-error.html"
><B
CLASS="function"
>pg_last_error()</B
></A
> sends an SQL statement to
the PostgreSQL database specified by the
<TT
CLASS="parameter"
><I
>connection</I
></TT
> resource. The
<TT
CLASS="parameter"
><I
>connection</I
></TT
> must be a valid connection that
was returned by <A
HREF="function.pg-connect.html"
><B
CLASS="function"
>pg_connect()</B
></A
> or
<A
HREF="function.pg-pconnect.html"
><B
CLASS="function"
>pg_pconnect()</B
></A
>. The return value of this
function is an query result resource to be used to access the
results from other PostgreSQL functions such as
<A
HREF="function.pg-fetch-array.html"
><B
CLASS="function"
>pg_fetch_array()</B
></A
>.
<DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Nota: </B
>
<TT
CLASS="parameter"
><I
>connection</I
></TT
> is a optional parameter for
<B
CLASS="function"
>pg_query()</B
>. If
<TT
CLASS="parameter"
><I
>connection</I
></TT
> is not set, default
connection is used. Default connection is the last connection
made by <A
HREF="function.pg-connect.html"
><B
CLASS="function"
>pg_connect()</B
></A
> or
<A
HREF="function.pg-pconnect.html"
><B
CLASS="function"
>pg_pconnect()</B
></A
>.
</P
><P
> Although <TT
CLASS="parameter"
><I
>connection</I
></TT
> can be omitted, it
is not recommended, since it could be a cause of hard to find
bug in script.
</P
></BLOCKQUOTE
></DIV
>
</P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Nota: </B
>
This function used to be called <TT
CLASS="literal"
>pg_exec()</TT
>.
<TT
CLASS="literal"
>pg_exec()</TT
> is still available for compatibility
reasons but users are encouraged to use the newer name.
</P
></BLOCKQUOTE
></DIV
><P
> See also <A
HREF="function.pg-connect.html"
><B
CLASS="function"
>pg_connect()</B
></A
>,
<A
HREF="function.pg-pconnect.html"
><B
CLASS="function"
>pg_pconnect()</B
></A
>,
<A
HREF="function.pg-fetch-array.html"
><B
CLASS="function"
>pg_fetch_array()</B
></A
>,
<A
HREF="function.pg-fetch-object.html"
><B
CLASS="function"
>pg_fetch_object()</B
></A
>,
<A
HREF="function.pg-num-rows.html"
><B
CLASS="function"
>pg_num_rows()</B
></A
>,
and <A
HREF="function.pg-affected-rows.html"
><B
CLASS="function"
>pg_affected_rows()</B
></A
>.
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