<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >pg_query_params</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REL="HOME" TITLE="Manual do PHP" HREF="index.html"><LINK REL="UP" TITLE="PostgreSQL" HREF="ref.pgsql.html"><LINK REL="PREVIOUS" TITLE="pg_put_line" HREF="function.pg-put-line.html"><LINK REL="NEXT" TITLE="pg_query" HREF="function.pg-query.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=UTF-8"></HEAD ><BODY CLASS="refentry" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >Manual do PHP</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="function.pg-put-line.html" ACCESSKEY="P" >Anterior</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.pg-query.html" ACCESSKEY="N" >Próxima</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.pg-query-params" ></A >pg_query_params</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN182294" ></A ><P > (PHP 5 >= 5.1.0RC1)</P >pg_query_params -- 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="AEN182297" ></A ><H2 >Descrição</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 > 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 > <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 > 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 > 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="AEN182336" ></A ><H2 >Parâmetros</H2 ><P > <P ></P ><DIV CLASS="variablelist" ><DL ><DT ><CODE CLASS="parameter" >connection</CODE ></DT ><DD ><P > 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 > 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 > An array of parameter values to substitute for the $1, $2, etc. placeholders in the original prepared query string. The number of elements in the array must match the number of placeholders. </P ></DD ></DL ></DIV > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN182358" ></A ><H2 >Valores de retornado</H2 ><P > A query result resource on success, or <TT CLASS="constant" ><B >FALSE</B ></TT > on failure.</P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN182362" ></A ><H2 >Exemplos</H2 ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN182365" ></A ><P ><B >Exemplo 1. Using <B CLASS="function" >pg_query_params()</B ></B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br /></font><font color="#FF8000">// Connect to a database named "mary"<br /></font><font color="#0000BB">$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. 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">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN182369" ></A ><H2 >Veja também</H2 ><P > <P ></P ><TABLE BORDER="0" ><TBODY ><TR ><TD ><A HREF="function.pg-query.html" ><B CLASS="function" >pg_query()</B ></A ></TD ></TR ></TBODY ></TABLE ><P ></P > </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="function.pg-put-line.html" ACCESSKEY="P" >Anterior</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Principal</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.pg-query.html" ACCESSKEY="N" >Próxima</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >pg_put_line</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.pgsql.html" ACCESSKEY="U" >Acima</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >pg_query</TD ></TR ></TABLE ></DIV ></BODY ></HTML >