<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >PDO->quote()</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="PDO Functions" HREF="ref.pdo.html"><LINK REL="PREVIOUS" TITLE="PDO->query()" HREF="function.pdo-query.html"><LINK REL="NEXT" TITLE="PDO->rollBack()" HREF="function.pdo-rollback.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.pdo-query.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.pdo-rollback.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.PDO-quote" ></A >PDO->quote()</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN176936" ></A ><P > (no version information, might be only in CVS)</P >PDO->quote() -- Quotes a string for use in a query. </DIV ><DIV CLASS="refsect1" ><A NAME="AEN176939" ></A ><H2 >说明</H2 >class <B CLASS="classname" >PDO</B > { <BR ></BR >string <B CLASS="methodname" >quote</B > ( string string [, int parameter_type] )<BR ></BR >}<P > <A HREF="function.pdo-quote.html" >PDO->quote()</A > places quotes around the input string (if required) and escapes special characters within the input string, using a quoting style appropriate to the underlying driver. </P ><P > If you are using this function to build SQL statements, you are <SPAN CLASS="emphasis" ><I CLASS="emphasis" >strongly</I ></SPAN > recommended to use <A HREF="function.pdo-prepare.html" >PDO->prepare()</A > to prepare SQL statements with bound parameters instead of using <A HREF="function.pdo-quote.html" >PDO->quote()</A > to interpolate user input into a SQL statement. Prepared statements with bound parameters are not only more portable, more convenient, immune to SQL injection, but are often much faster to execute than interpolated queries, as both the server and client side can cache a compiled form of the query. </P ><P > Not all PDO drivers implement this method (notably PDO_ODBC). Consider using prepared statements instead. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN176960" ></A ><H2 >参数</H2 ><P > <P ></P ><DIV CLASS="variablelist" ><DL ><DT ><CODE CLASS="parameter" >string</CODE ></DT ><DD ><P > The string to be quoted. </P ></DD ><DT ><CODE CLASS="parameter" >parameter_type</CODE ></DT ><DD ><P > Provides a data type hint for drivers that have alternate quoting styles. The default value is PDO::PARAM_STR. </P ></DD ></DL ></DIV > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN176974" ></A ><H2 >返回值</H2 ><P > Returns a quoted string that is theoretically safe to pass into an SQL statement. Returns <TT CLASS="constant" ><B >FALSE</B ></TT > if the driver does not support quoting in this way. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN176978" ></A ><H2 >范例</H2 ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN176981" ></A ><P ><B >例 1. Quoting a normal string</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$conn </font><font color="#007700">= new </font><font color="#0000BB">PDO</font><font color="#007700">(</font><font color="#DD0000">'sqlite:/home/lynn/music.sql3'</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* Simple string */<br /></font><font color="#0000BB">$string </font><font color="#007700">= </font><font color="#DD0000">'Nice'</font><font color="#007700">;<br />print </font><font color="#DD0000">"Unquoted string: $string</font><font color="#007700">\n</font><font color="#DD0000">"</font><font color="#007700">;<br />print </font><font color="#DD0000">"Quoted string: " </font><font color="#007700">. </font><font color="#0000BB">$conn</font><font color="#007700">-></font><font color="#0000BB">quote</font><font color="#007700">(</font><font color="#0000BB">$string</font><font color="#007700">) . </font><font color="#DD0000">"\n"</font><font color="#007700">;<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ><P >上例将输出:</P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="screen" >Unquoted string: Nice Quoted string: 'Nice'</PRE ></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN176986" ></A ><P ><B >例 2. Quoting a dangerous string</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$conn </font><font color="#007700">= new </font><font color="#0000BB">PDO</font><font color="#007700">(</font><font color="#DD0000">'sqlite:/home/lynn/music.sql3'</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* Dangerous string */<br /></font><font color="#0000BB">$string </font><font color="#007700">= </font><font color="#DD0000">'Naughty \' string'</font><font color="#007700">;<br />print </font><font color="#DD0000">"Unquoted string: $string</font><font color="#007700">\n</font><font color="#DD0000">"</font><font color="#007700">;<br />print </font><font color="#DD0000">"Quoted string:" </font><font color="#007700">. </font><font color="#0000BB">$conn</font><font color="#007700">-></font><font color="#0000BB">quote</font><font color="#007700">(</font><font color="#0000BB">$string</font><font color="#007700">) . </font><font color="#DD0000">"\n"</font><font color="#007700">;<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ><P >上例将输出:</P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="screen" >Unquoted string: Naughty ' string Quoted string: 'Naughty '' string'</PRE ></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN176991" ></A ><P ><B >例 3. Quoting a complex string</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$conn </font><font color="#007700">= new </font><font color="#0000BB">PDO</font><font color="#007700">(</font><font color="#DD0000">'sqlite:/home/lynn/music.sql3'</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* Complex string */<br /></font><font color="#0000BB">$string </font><font color="#007700">= </font><font color="#DD0000">"Co'mpl''ex \"st'\"ring"</font><font color="#007700">;<br />print </font><font color="#DD0000">"Unquoted string: $string</font><font color="#007700">\n</font><font color="#DD0000">"</font><font color="#007700">;<br />print </font><font color="#DD0000">"Quoted string: " </font><font color="#007700">. </font><font color="#0000BB">$conn</font><font color="#007700">-></font><font color="#0000BB">quote</font><font color="#007700">(</font><font color="#0000BB">$string</font><font color="#007700">) . </font><font color="#DD0000">"\n"</font><font color="#007700">;<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ><P >上例将输出:</P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="screen" >Unquoted string: Co'mpl''ex "st'"ring Quoted string: 'Co''mpl''''ex "st''"ring'</PRE ></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN176996" ></A ><H2 >参见</H2 ><P > <P ></P ><TABLE BORDER="0" ><TBODY ><TR ><TD ><A HREF="function.pdo-prepare.html" >PDO->prepare()</A ></TD ></TR ><TR ><TD ><A HREF="function.pdostatement-execute.html" >PDOStatement->execute()</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.pdo-query.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.pdo-rollback.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >PDO->query()</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.pdo.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >PDO->rollBack()</TD ></TR ></TABLE ></DIV ></BODY ></HTML >