<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >mysqli_thread_id</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_store_result" HREF="function.mysqli-store-result.html"><LINK REL="NEXT" TITLE="mysqli_thread_safe" HREF="function.mysqli-thread-safe.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-store-result.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-thread-safe.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.mysqli-thread-id" ></A >mysqli_thread_id</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN143098" ></A ><P > (PHP 5)</P >mysqli_thread_id<P > (no version information, might be only in CVS)</P >mysqli->thread_id -- Returns the thread ID for the current connection</DIV ><DIV CLASS="refsect1" ><A NAME="AEN143102" ></A ><H2 >说明</H2 ><P >Procedural style:</P >int <B CLASS="methodname" >mysqli_thread_id</B > ( mysqli link )<BR ></BR ><P >Object oriented style (property):</P >class <B CLASS="classname" >mysqli</B > { <BR ></BR >int thread_id<BR ></BR >}<P > The <B CLASS="function" >mysqli_thread_id()</B > function returns the thread ID for the current connection which can then be killed using the <A HREF="function.mysqli-kill.html" ><B CLASS="function" >mysqli_kill()</B ></A > function. If the connection is lost and you reconnect with <A HREF="function.mysqli-ping.html" ><B CLASS="function" >mysqli_ping()</B ></A >, the thread ID will be other. Therefore you should get the thread ID only when you need it. </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >注意: </B > The thread ID is assigned on a connection-by-connection basis. Hence, if the connection is broken and then re-established a new thread ID will be assigned. </P ><P > To kill a running query you can use the SQL command <TT CLASS="literal" >KILL QUERY processid</TT >. </P ></BLOCKQUOTE ></DIV ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN143126" ></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 ></DL ></DIV > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN143137" ></A ><H2 >返回值</H2 ><P > Returns the Thread ID for the current connection. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN143140" ></A ><H2 >范例</H2 ><TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN143142" ></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 />$mysqli </font><font color="#007700">= new </font><font color="#0000BB">mysqli</font><font color="#007700">(</font><font color="#DD0000">"localhost"</font><font color="#007700">, </font><font color="#DD0000">"my_user"</font><font color="#007700">, </font><font color="#DD0000">"my_password"</font><font color="#007700">, </font><font color="#DD0000">"world"</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* check connection */<br /></font><font color="#007700">if (</font><font color="#0000BB">mysqli_connect_errno</font><font color="#007700">()) {<br /> </font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Connect failed: %s\n"</font><font color="#007700">, </font><font color="#0000BB">mysqli_connect_error</font><font color="#007700">());<br /> exit();<br />}<br /><br /></font><font color="#FF8000">/* determine our thread id */<br /></font><font color="#0000BB">$thread_id </font><font color="#007700">= </font><font color="#0000BB">$mysqli</font><font color="#007700">-></font><font color="#0000BB">thread_id</font><font color="#007700">;<br /><br /></font><font color="#FF8000">/* Kill connection */<br /></font><font color="#0000BB">$mysqli</font><font color="#007700">-></font><font color="#0000BB">kill</font><font color="#007700">(</font><font color="#0000BB">$thread_id</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* This should produce an error */<br /></font><font color="#007700">if (!</font><font color="#0000BB">$mysqli</font><font color="#007700">-></font><font color="#0000BB">query</font><font color="#007700">(</font><font color="#DD0000">"CREATE TABLE myCity LIKE City"</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">$mysqli</font><font color="#007700">-></font><font color="#0000BB">error</font><font color="#007700">);<br /> exit;<br />}<br /><br /></font><font color="#FF8000">/* close connection */<br /></font><font color="#0000BB">$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="AEN143145" ></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 />$link </font><font color="#007700">= </font><font color="#0000BB">mysqli_connect</font><font color="#007700">(</font><font color="#DD0000">"localhost"</font><font color="#007700">, </font><font color="#DD0000">"my_user"</font><font color="#007700">, </font><font color="#DD0000">"my_password"</font><font color="#007700">, </font><font color="#DD0000">"world"</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* check connection */<br /></font><font color="#007700">if (</font><font color="#0000BB">mysqli_connect_errno</font><font color="#007700">()) {<br /> </font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Connect failed: %s\n"</font><font color="#007700">, </font><font color="#0000BB">mysqli_connect_error</font><font color="#007700">());<br /> exit();<br />}<br /><br /></font><font color="#FF8000">/* determine our thread id */<br /></font><font color="#0000BB">$thread_id </font><font color="#007700">= </font><font color="#0000BB">mysqli_thread_id</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* Kill connection */<br /></font><font color="#0000BB">mysqli_kill</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#0000BB">$thread_id</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* This should produce an error */<br /></font><font color="#007700">if (!</font><font color="#0000BB">mysqli_query</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#DD0000">"CREATE TABLE myCity LIKE City"</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">$link</font><font color="#007700">));<br /> exit;<br />}<br /><br /></font><font color="#FF8000">/* close connection */<br /></font><font color="#0000BB">mysqli_close</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">);<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE ><P >上例将输出:</P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="screen" >Error: MySQL server has gone away</PRE ></TD ></TR ></TABLE ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN143150" ></A ><H2 >参见</H2 ><P > <P ></P ><TABLE BORDER="0" ><TBODY ><TR ><TD ><A HREF="function.mysqli-kill.html" ><B CLASS="function" >mysqli_kill()</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-store-result.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-thread-safe.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >mysqli_store_result</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_thread_safe</TD ></TR ></TABLE ></DIV ></BODY ></HTML >