<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >mysqli_prepare</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="MySQL Melhorada" HREF="ref.mysqli.html"><LINK REL="PREVIOUS" TITLE="mysqli_ping" HREF="function.mysqli-ping.html"><LINK REL="NEXT" TITLE="mysqli_query" HREF="function.mysqli-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.mysqli-ping.html" ACCESSKEY="P" >Anterior</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.mysqli-query.html" ACCESSKEY="N" >Próxima</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.mysqli-prepare" ></A >mysqli_prepare</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN135271" ></A ><P > (PHP 5)</P >mysqli_prepare<P > (no version information, might be only in CVS)</P >mysqli->prepare() -- Prepare a SQL statement for execution</DIV ><DIV CLASS="refsect1" ><A NAME="AEN135275" ></A ><H2 >Descrição</H2 ><P >Procedure style:</P >mysqli_stmt <B CLASS="methodname" >mysqli_prepare</B > ( mysqli link, string query )<BR ></BR ><P >Object oriented style (method)</P >class <B CLASS="classname" >mysqli</B > { <BR ></BR >mysqli_stmt <B CLASS="methodname" >prepare</B > ( string query )<BR ></BR >}<P > Prepares the SQL query pointed to by the null-terminated string query, and returns a statement handle to be used for further operations on the statement. The query must consist of a single SQL statement. </P ><P > The parameter markers must be bound to application variables using <A HREF="function.mysqli-stmt-bind-param.html" ><B CLASS="function" >mysqli_stmt_bind_param()</B ></A > and/or <A HREF="function.mysqli-stmt-bind-result.html" ><B CLASS="function" >mysqli_stmt_bind_result()</B ></A > before executing the statement or fetching rows. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN135301" ></A ><H2 >Parâmetros</H2 ><P > <P ></P ><DIV CLASS="variablelist" ><DL ><DT ><CODE CLASS="parameter" > link</CODE ></DT ><DD ><P >Apenas para estilo de procedimento: Um identificador de conexão retornado por <A HREF="function.mysqli-connect.html" ><B CLASS="function" >mysqli_connect()</B ></A > or <A HREF="function.mysqli-init.html" ><B CLASS="function" >mysqli_init()</B ></A > </P ></DD ><DT ><CODE CLASS="parameter" >query</CODE ></DT ><DD ><P > The query, as a string. </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >Nota: </B > You should not add a terminating semicolon or <TT CLASS="literal" >\g</TT > to the statement. </P ></BLOCKQUOTE ></DIV ><P > This parameter can include one or more parameter markers in the SQL statement by embedding question mark (<TT CLASS="literal" >?</TT >) characters at the appropriate positions. </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >Nota: </B > The markers are legal only in certain places in SQL statements. For example, they are allowed in the <TT CLASS="literal" >VALUES()</TT > list of an <TT CLASS="literal" >INSERT</TT > statement (to specify column values for a row), or in a comparison with a column in a <TT CLASS="literal" >WHERE</TT > clause to specify a comparison value. </P ><P > However, they are not allowed for identifiers (such as table or column names), in the select list that names the columns to be returned by a <TT CLASS="literal" >SELECT</TT > statement, or to specify both operands of a binary operator such as the <TT CLASS="literal" >=</TT > equal sign. The latter restriction is necessary because it would be impossible to determine the parameter type. It's not allowed to compare marker with <TT CLASS="literal" >NULL</TT > by <TT CLASS="literal" >? IS NULL</TT > too. In general, parameters are legal only in Data Manipulation Languange (DML) statements, and not in Data Defination Language (DDL) statements. </P ></BLOCKQUOTE ></DIV ></DD ></DL ></DIV > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN135332" ></A ><H2 >Valores de retornado</H2 ><P > <B CLASS="function" >mysqli_prepare()</B > returns a statement object or <TT CLASS="constant" ><B >FALSE</B ></TT > if an error occured. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN135337" ></A ><H2 >Exemplos</H2 ><TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN135339" ></A ><P ><B >Exemplo 1. Object oriented style</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$mysqli </font><font color="#007700">= new </font><font color="#0000BB">mysqli</font><font color="#007700">(</font><font color="#DD0000">"localhost"</font><font color="#007700">, </font><font color="#DD0000">"my_user"</font><font color="#007700">, </font><font color="#DD0000">"my_password"</font><font color="#007700">, </font><font color="#DD0000">"world"</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* check connection */<br /></font><font color="#007700">if (</font><font color="#0000BB">mysqli_connect_errno</font><font color="#007700">()) {<br /> </font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Connect failed: %s\n"</font><font color="#007700">, </font><font color="#0000BB">mysqli_connect_error</font><font color="#007700">());<br /> exit();<br />}<br /><br /></font><font color="#0000BB">$city </font><font color="#007700">= </font><font color="#DD0000">"Amersfoort"</font><font color="#007700">;<br /><br /></font><font color="#FF8000">/* create a prepared statement */<br /></font><font color="#007700">if (</font><font color="#0000BB">$stmt </font><font color="#007700">= </font><font color="#0000BB">$mysqli</font><font color="#007700">-></font><font color="#0000BB">prepare</font><font color="#007700">(</font><font color="#DD0000">"SELECT District FROM City WHERE Name=?"</font><font color="#007700">)) {<br /><br /> </font><font color="#FF8000">/* bind parameters for markers */<br /> </font><font color="#0000BB">$stmt</font><font color="#007700">-></font><font color="#0000BB">bind_param</font><font color="#007700">(</font><font color="#DD0000">"s"</font><font color="#007700">, </font><font color="#0000BB">$city</font><font color="#007700">);<br /><br /> </font><font color="#FF8000">/* execute query */<br /> </font><font color="#0000BB">$stmt</font><font color="#007700">-></font><font color="#0000BB">execute</font><font color="#007700">();<br /><br /> </font><font color="#FF8000">/* bind result variables */<br /> </font><font color="#0000BB">$stmt</font><font color="#007700">-></font><font color="#0000BB">bind_result</font><font color="#007700">(</font><font color="#0000BB">$district</font><font color="#007700">);<br /><br /> </font><font color="#FF8000">/* fetch value */<br /> </font><font color="#0000BB">$stmt</font><font color="#007700">-></font><font color="#0000BB">fetch</font><font color="#007700">();<br /><br /> </font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"%s is in district %s\n"</font><font color="#007700">, </font><font color="#0000BB">$city</font><font color="#007700">, </font><font color="#0000BB">$district</font><font color="#007700">);<br /><br /> </font><font color="#FF8000">/* close statement */<br /> </font><font color="#0000BB">$stmt</font><font color="#007700">-></font><font color="#0000BB">close</font><font color="#007700">();<br />}<br /><br /></font><font color="#FF8000">/* close connection */<br /></font><font color="#0000BB">$mysqli</font><font color="#007700">-></font><font color="#0000BB">close</font><font color="#007700">();<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE ><TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN135342" ></A ><P ><B >Exemplo 2. Procedural style</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$link </font><font color="#007700">= </font><font color="#0000BB">mysqli_connect</font><font color="#007700">(</font><font color="#DD0000">"localhost"</font><font color="#007700">, </font><font color="#DD0000">"my_user"</font><font color="#007700">, </font><font color="#DD0000">"my_password"</font><font color="#007700">, </font><font color="#DD0000">"world"</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* check connection */<br /></font><font color="#007700">if (</font><font color="#0000BB">mysqli_connect_errno</font><font color="#007700">()) {<br /> </font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Connect failed: %s\n"</font><font color="#007700">, </font><font color="#0000BB">mysqli_connect_error</font><font color="#007700">());<br /> exit();<br />}<br /><br /></font><font color="#0000BB">$city </font><font color="#007700">= </font><font color="#DD0000">"Amersfoort"</font><font color="#007700">;<br /><br /></font><font color="#FF8000">/* create a prepared statement */<br /></font><font color="#007700">if (</font><font color="#0000BB">$stmt </font><font color="#007700">= </font><font color="#0000BB">mysqli_prepare</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#DD0000">"SELECT District FROM City WHERE Name=?"</font><font color="#007700">)) {<br /><br /> </font><font color="#FF8000">/* bind parameters for markers */<br /> </font><font color="#0000BB">mysqli_stmt_bind_param</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">, </font><font color="#DD0000">"s"</font><font color="#007700">, </font><font color="#0000BB">$city</font><font color="#007700">);<br /><br /> </font><font color="#FF8000">/* execute query */<br /> </font><font color="#0000BB">mysqli_stmt_execute</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">);<br /><br /> </font><font color="#FF8000">/* bind result variables */<br /> </font><font color="#0000BB">mysqli_stmt_bind_result</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">, </font><font color="#0000BB">$district</font><font color="#007700">);<br /><br /> </font><font color="#FF8000">/* fetch value */<br /> </font><font color="#0000BB">mysqli_stmt_fetch</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">);<br /><br /> </font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"%s is in district %s\n"</font><font color="#007700">, </font><font color="#0000BB">$city</font><font color="#007700">, </font><font color="#0000BB">$district</font><font color="#007700">);<br /><br /> </font><font color="#FF8000">/* close statement */<br /> </font><font color="#0000BB">mysqli_stmt_close</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">);<br />}<br /><br /></font><font color="#FF8000">/* close connection */<br /></font><font color="#0000BB">mysqli_close</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">);<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE ><P >O exemplo acima irá imprimir:</P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="screen" >Amersfoort is in district Utrecht</PRE ></TD ></TR ></TABLE ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN135347" ></A ><H2 >Veja também</H2 ><P > <P ></P ><TABLE BORDER="0" ><TBODY ><TR ><TD ><A HREF="function.mysqli-stmt-execute.html" ><B CLASS="function" >mysqli_stmt_execute()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.mysqli-stmt-fetch.html" ><B CLASS="function" >mysqli_stmt_fetch()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.mysqli-stmt-bind-param.html" ><B CLASS="function" >mysqli_stmt_bind_param()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.mysqli-stmt-bind-result.html" ><B CLASS="function" >mysqli_stmt_bind_result()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.mysqli-stmt-close.html" ><B CLASS="function" >mysqli_stmt_close()</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.mysqli-ping.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.mysqli-query.html" ACCESSKEY="N" >Próxima</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >mysqli_ping</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.mysqli.html" ACCESSKEY="U" >Acima</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >mysqli_query</TD ></TR ></TABLE ></DIV ></BODY ></HTML >