<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >mysqli_query</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REL="HOME" TITLE="PHP 手册" HREF="index.html"><LINK REL="UP" TITLE="MySQLi 扩展库" HREF="ref.mysqli.html"><LINK REL="PREVIOUS" TITLE="mysqli_prepare" HREF="function.mysqli-prepare.html"><LINK REL="NEXT" TITLE="mysqli_real_connect" HREF="function.mysqli-real-connect.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" >PHP 手册</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="function.mysqli-prepare.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.mysqli-real-connect.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.mysqli-query" ></A >mysqli_query</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN140584" ></A ><P > (PHP 5)</P >mysqli_query<P > (no version information, might be only in CVS)</P >mysqli->query() -- Performs a query on the database</DIV ><DIV CLASS="refsect1" ><A NAME="AEN140588" ></A ><H2 >说明</H2 ><P >Procedural style:</P >mixed <B CLASS="methodname" >mysqli_query</B > ( mysqli link, string query [, int resultmode] )<BR ></BR ><P >Object oriented style (method):</P >class <B CLASS="classname" >mysqli</B > { <BR ></BR >mixed <B CLASS="methodname" >query</B > ( string query [, int resultmode] )<BR ></BR >}<P > Performs a <CODE CLASS="parameter" >query</CODE > against the database. </P ><P > Functionally, using this function is identical to calling <A HREF="function.mysqli-real-query.html" ><B CLASS="function" >mysqli_real_query()</B ></A > followed either by <A HREF="function.mysqli-use-result.html" ><B CLASS="function" >mysqli_use_result()</B ></A > or <A HREF="function.mysqli-store-result.html" ><B CLASS="function" >mysqli_store_result()</B ></A >. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN140622" ></A ><H2 >参数</H2 ><P > <P ></P ><DIV CLASS="variablelist" ><DL ><DT ><CODE CLASS="parameter" > link</CODE ></DT ><DD ><P >Procedural style only: A link identifier returned by <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 string. </P ></DD ><DT ><CODE CLASS="parameter" >resultmode</CODE ></DT ><DD ><P > Either the constant <TT CLASS="constant" ><B >MYSQLI_USE_RESULT</B ></TT > or <TT CLASS="constant" ><B >MYSQLI_STORE_RESULT</B ></TT > depending on the desired behavior. By default, <TT CLASS="constant" ><B >MYSQLI_STORE_RESULT</B ></TT > is used. </P ><P > If you use <TT CLASS="constant" ><B >MYSQLI_USE_RESULT</B ></TT > all subsequent calls will return error <TT CLASS="literal" >Commands out of sync</TT > unless you call <A HREF="function.mysqli-free-result.html" ><B CLASS="function" >mysqli_free_result()</B ></A > </P ></DD ></DL ></DIV > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN140650" ></A ><H2 >返回值</H2 ><P > 如果成功则返回 <TT CLASS="constant" ><B >TRUE</B ></TT >,失败则返回 <TT CLASS="constant" ><B >FALSE</B ></TT >。 For <TT CLASS="literal" >SELECT, SHOW, DESCRIBE</TT > or <TT CLASS="literal" >EXPLAIN</TT > <B CLASS="function" >mysqli_query()</B > will return a result object. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN140658" ></A ><H2 >范例</H2 ><TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN140660" ></A ><P ><B >例 1. Object oriented style</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$mysqli </font><font color="#007700">= new </font><font color="#0000BB">mysqli</font><font color="#007700">(</font><font color="#DD0000">"localhost"</font><font color="#007700">, </font><font color="#DD0000">"my_user"</font><font color="#007700">, </font><font color="#DD0000">"my_password"</font><font color="#007700">, </font><font color="#DD0000">"world"</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* check connection */<br /></font><font color="#007700">if (</font><font color="#0000BB">mysqli_connect_errno</font><font color="#007700">()) {<br /> </font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Connect failed: %s\n"</font><font color="#007700">, </font><font color="#0000BB">mysqli_connect_error</font><font color="#007700">());<br /> exit();<br />}<br /><br /></font><font color="#FF8000">/* Create table doesn't return a resultset */<br /></font><font color="#007700">if (</font><font color="#0000BB">$mysqli</font><font color="#007700">-></font><font color="#0000BB">query</font><font color="#007700">(</font><font color="#DD0000">"CREATE TEMPORARY TABLE myCity LIKE City"</font><font color="#007700">) === </font><font color="#0000BB">TRUE</font><font color="#007700">) {<br /> </font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Table myCity successfully created.\n"</font><font color="#007700">);<br />}<br /><br /></font><font color="#FF8000">/* Select queries return a resultset */<br /></font><font color="#007700">if (</font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">$mysqli</font><font color="#007700">-></font><font color="#0000BB">query</font><font color="#007700">(</font><font color="#DD0000">"SELECT Name FROM City LIMIT 10"</font><font color="#007700">)) {<br /> </font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Select returned %d rows.\n"</font><font color="#007700">, </font><font color="#0000BB">$result</font><font color="#007700">-></font><font color="#0000BB">num_rows</font><font color="#007700">);<br /><br /> </font><font color="#FF8000">/* free result set */<br /> </font><font color="#0000BB">$result</font><font color="#007700">-></font><font color="#0000BB">close</font><font color="#007700">();<br />}<br /><br /></font><font color="#FF8000">/* If we have to retrieve large amount of data we use MYSQLI_USE_RESULT */<br /></font><font color="#007700">if (</font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">$mysqli</font><font color="#007700">-></font><font color="#0000BB">query</font><font color="#007700">(</font><font color="#DD0000">"SELECT * FROM City"</font><font color="#007700">, </font><font color="#0000BB">MYSQLI_USE_RESULT</font><font color="#007700">)) {<br /><br /> </font><font color="#FF8000">/* Note, that we can't execute any functions which interact with the<br /> server until result set was closed. All calls will return an<br /> 'out of sync' error */<br /> </font><font color="#007700">if (!</font><font color="#0000BB">$mysqli</font><font color="#007700">-></font><font color="#0000BB">query</font><font color="#007700">(</font><font color="#DD0000">"SET @a:='this will not work'"</font><font color="#007700">)) {<br /> </font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Error: %s\n"</font><font color="#007700">, </font><font color="#0000BB">$mysqli</font><font color="#007700">-></font><font color="#0000BB">error</font><font color="#007700">);<br /> }<br /> </font><font color="#0000BB">$result</font><font color="#007700">-></font><font color="#0000BB">close</font><font color="#007700">();<br />}<br /><br /></font><font color="#0000BB">$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="AEN140663" ></A ><P ><B >例 2. Procedural style</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$link </font><font color="#007700">= </font><font color="#0000BB">mysqli_connect</font><font color="#007700">(</font><font color="#DD0000">"localhost"</font><font color="#007700">, </font><font color="#DD0000">"my_user"</font><font color="#007700">, </font><font color="#DD0000">"my_password"</font><font color="#007700">, </font><font color="#DD0000">"world"</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* check connection */<br /></font><font color="#007700">if (</font><font color="#0000BB">mysqli_connect_errno</font><font color="#007700">()) {<br /> </font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Connect failed: %s\n"</font><font color="#007700">, </font><font color="#0000BB">mysqli_connect_error</font><font color="#007700">());<br /> exit();<br />}<br /><br /></font><font color="#FF8000">/* Create table doesn't return a resultset */<br /></font><font color="#007700">if (</font><font color="#0000BB">mysqli_query</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#DD0000">"CREATE TEMPORARY TABLE myCity LIKE City"</font><font color="#007700">) === </font><font color="#0000BB">TRUE</font><font color="#007700">) {<br /> </font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Table myCity successfully created.\n"</font><font color="#007700">);<br />}<br /><br /></font><font color="#FF8000">/* Select queries return a resultset */<br /></font><font color="#007700">if (</font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">mysqli_query</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#DD0000">"SELECT Name FROM City LIMIT 10"</font><font color="#007700">)) {<br /> </font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Select returned %d rows.\n"</font><font color="#007700">, </font><font color="#0000BB">mysqli_num_rows</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">));<br /><br /> </font><font color="#FF8000">/* free result set */<br /> </font><font color="#0000BB">mysqli_free_result</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br />}<br /><br /></font><font color="#FF8000">/* If we have to retrieve large amount of data we use MYSQLI_USE_RESULT */<br /></font><font color="#007700">if (</font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">mysqli_query</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#DD0000">"SELECT * FROM City"</font><font color="#007700">, </font><font color="#0000BB">MYSQLI_USE_RESULT</font><font color="#007700">)) {<br /><br /> </font><font color="#FF8000">/* Note, that we can't execute any functions which interact with the<br /> server until result set was closed. All calls will return an<br /> 'out of sync' error */<br /> </font><font color="#007700">if (!</font><font color="#0000BB">mysqli_query</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#DD0000">"SET @a:='this will not work'"</font><font color="#007700">)) {<br /> </font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Error: %s\n"</font><font color="#007700">, </font><font color="#0000BB">mysqli_error</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">));<br /> }<br /> </font><font color="#0000BB">mysqli_free_result</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br />}<br /><br /></font><font color="#0000BB">mysqli_close</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">);<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE ><P >上例将输出:</P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="screen" >Table myCity successfully created. Select returned 10 rows. Error: Commands out of sync; You can't run this command now</PRE ></TD ></TR ></TABLE ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN140668" ></A ><H2 >参见</H2 ><P > <P ></P ><TABLE BORDER="0" ><TBODY ><TR ><TD ><A HREF="function.mysqli-real-query.html" ><B CLASS="function" >mysqli_real_query()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.mysqli-multi-query.html" ><B CLASS="function" >mysqli_multi_query()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.mysqli-free-result.html" ><B CLASS="function" >mysqli_free_result()</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-prepare.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >起始页</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.mysqli-real-connect.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >mysqli_prepare</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.mysqli.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >mysqli_real_connect</TD ></TR ></TABLE ></DIV ></BODY ></HTML >