<HTML ><HEAD ><TITLE >mysql_errno</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="PHP Manual" HREF="index.html"><LINK REL="UP" TITLE="MySQL Functions" HREF="ref.mysql.html"><LINK REL="PREVIOUS" TITLE="mysql_drop_db" HREF="function.mysql-drop-db.html"><LINK REL="NEXT" TITLE="mysql_error" HREF="function.mysql-error.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=ISO-8859-1"></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 Manual</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="function.mysql-drop-db.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.mysql-error.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.mysql-errno" ></A >mysql_errno</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN58522" ></A ><P > (PHP 3, PHP 4 )</P >mysql_errno -- Returns the numerical value of the error message from previous MySQL operation </DIV ><DIV CLASS="refsect1" ><A NAME="AEN58525" ></A ><H2 >Description</H2 >int <B CLASS="methodname" >mysql_errno</B > ( [resource link_identifier])<BR ></BR ><P > Returns the error number from the last MySQL function, or <TT CLASS="literal" >0</TT > (zero) if no error occurred. </P ><P > Errors coming back from the MySQL database backend no longer issue warnings. Instead, use <B CLASS="function" >mysql_errno()</B > to retrieve the error code. Note that this function only returns the error code from the most recently executed MySQL function (not including <A HREF="function.mysql-error.html" ><B CLASS="function" >mysql_error()</B ></A > and <B CLASS="function" >mysql_errno()</B >), so if you want to use it, make sure you check the value before calling another MySQL function. <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN58539" ></A ><P ><B >Example 1. mysql_errno Example</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="php" ><?php mysql_connect("localhost", "mysql_user", "mysql_password"); mysql_select_db("nonexistentdb"); echo mysql_errno() . ": " . mysql_error(). "\n"; mysql_select_db("kossu"); mysql_query("SELECT * FROM nonexistenttable"); echo mysql_errno() . ": " . mysql_error() . "\n"; ?></PRE ></TD ></TR ></TABLE ><P > The above example would produce the following output: </P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="screen" >1049: Unknown database 'nonexistentdb' 1146: Table 'kossu.nonexistenttable' doesn't exist</PRE ></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >Note: </B > If the optional argument is specified the given link is used to retrieve the error code. If not, the last opened link is used. </P ></BLOCKQUOTE ></DIV ><P > See also: <A HREF="function.mysql-error.html" ><B CLASS="function" >mysql_error()</B ></A > </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.mysql-drop-db.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.mysql-error.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >mysql_drop_db</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.mysql.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >mysql_error</TD ></TR ></TABLE ></DIV ></BODY ></HTML >