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>pg_query_params</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN186554"
></A
><P
>    (PHP 5 &#62;= 5.1.0RC1)</P
>pg_query_params&nbsp;--&nbsp;Submits a command to the server and waits for the result, with the ability to pass parameters separately from the SQL command text.</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN186557"
></A
><H2
>说明</H2
>resource <B
CLASS="methodname"
>pg_query_params</B
> ( resource connection, string query, array params )<BR
></BR
>resource <B
CLASS="methodname"
>pg_query_params</B
> ( string query, array params )<BR
></BR
><P
>&#13;    Submits a command to the server and waits for the result, with the ability 
    to pass parameters separately from the SQL command text.
  </P
><P
>&#13;    <B
CLASS="function"
>pg_query_params()</B
> is like <A
HREF="function.pg-query.html"
><B
CLASS="function"
>pg_query()</B
></A
>, 
    but offers additional functionality: parameter 
    values can be specified separately from the command string proper. 
    <B
CLASS="function"
>pg_query_params()</B
> is supported only against PostgreSQL 7.4 or
    higher connections; it will fail when using earlier versions.
  </P
><P
>&#13;    If parameters are used, they are referred to in the <CODE
CLASS="parameter"
>query</CODE
> 
    string as $1, $2, etc.  <CODE
CLASS="parameter"
>params</CODE
> specifies the actual values of the 
    parameters. A <TT
CLASS="constant"
><B
>NULL</B
></TT
> value in this array means the corresponding parameter is SQL
    <TT
CLASS="literal"
>NULL</TT
>.
  </P
><P
>&#13;    The primary advantage of <B
CLASS="function"
>pg_query_params()</B
> over <A
HREF="function.pg-query.html"
><B
CLASS="function"
>pg_query()</B
></A
> 
    is that parameter values 
    may be separated from the <CODE
CLASS="parameter"
>query</CODE
> string, thus avoiding the need for tedious 
    and error-prone quoting and escaping. Unlike <A
HREF="function.pg-query.html"
><B
CLASS="function"
>pg_query()</B
></A
>, 
    <B
CLASS="function"
>pg_query_params()</B
> allows at 
    most one SQL command in the given string. (There can be semicolons in it, 
    but not more than one nonempty command.)
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN186596"
></A
><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>connection</CODE
></DT
><DD
><P
>&#13;       PostgreSQL database connection resource.  When 
       <CODE
CLASS="parameter"
>connection</CODE
> is not present, the default connection 
       is used. The 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
></DD
><DT
><CODE
CLASS="parameter"
>query</CODE
></DT
><DD
><P
>&#13;       The parameterised SQL statement.  Must contain only a single statement.
       (multiple statements separated by semi-colons are not allowed.)  If any parameters 
       are used, they are referred to as $1, $2, etc.
      </P
></DD
><DT
><CODE
CLASS="parameter"
>params</CODE
></DT
><DD
><P
>&#13;        An array of parameter values to substitute for the $1, $2, etc. placeholders
        in the original prepared query string.  The number of elements in the array
        must match the number of placeholders.
      </P
></DD
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN186618"
></A
><H2
>返回值</H2
><P
>&#13;    A query result resource on success, or <TT
CLASS="constant"
><B
>FALSE</B
></TT
> on failure.</P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN186622"
></A
><H2
>范例</H2
><P
>&#13;   <TABLE
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><DIV
CLASS="example"
><A
NAME="AEN186625"
></A
><P
><B
>例 1. Using <B
CLASS="function"
>pg_query_params()</B
></B
></P
><TABLE
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><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /></font><font color="#FF8000">// Connect to a database named "mary"<br /></font><font color="#0000BB">$dbconn </font><font color="#007700">= </font><font color="#0000BB">pg_connect</font><font color="#007700">(</font><font color="#DD0000">"dbname=mary"</font><font color="#007700">);<br /><br /></font><font color="#FF8000">// Find all shops named Joe's Widgets.&nbsp;&nbsp;Note that it is not necessary to<br />// escape "Joe's Widgets"<br /></font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">pg_query_params</font><font color="#007700">(</font><font color="#0000BB">$dbconn</font><font color="#007700">, </font><font color="#DD0000">'SELECT * FROM shops WHERE name = $1'</font><font color="#007700">, array(</font><font color="#DD0000">"Joe's Widgets"</font><font color="#007700">));<br /><br /></font><font color="#FF8000">// Compare against just using pg_query<br /></font><font color="#0000BB">$str </font><font color="#007700">= </font><font color="#0000BB">pg_escape_string</font><font color="#007700">(</font><font color="#DD0000">"Joe's Widgets"</font><font color="#007700">);<br /></font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">pg_query</font><font color="#007700">(</font><font color="#0000BB">$dbconn</font><font color="#007700">, </font><font color="#DD0000">"SELECT * FROM shops WHERE name = '</font><font color="#007700">{</font><font color="#DD0000">$str</font><font color="#007700">}</font><font color="#DD0000">'"</font><font color="#007700">);<br /><br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
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>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN186629"
></A
><H2
>参见</H2
><P
>&#13;   <P
></P
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><A
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