<HTML ><HEAD ><TITLE >mysql_connect</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.44"><LINK REL="HOME" TITLE="PHP Manual" HREF="manual.html"><LINK REL="UP" TITLE="MySQL functions" HREF="ref.mysql.html"><LINK REL="PREVIOUS" TITLE="mysql_close" HREF="function.mysql-close.html"><LINK REL="NEXT" TITLE="mysql_create_db" HREF="function.mysql-create-db.html"></HEAD ><BODY BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><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-close.html" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.mysql-create-db.html" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.mysql-connect" >mysql_connect</A ></H1 ><DIV CLASS="refnamediv" ><A NAME="AEN18476" ></A >mysql_connect -- Open a connection to a MySQL Server</DIV ><DIV CLASS="refsect1" ><A NAME="AEN18479" ></A ><H2 >Description</H2 ><DIV CLASS="funcsynopsis" ><P ></P ><CODE CLASS="FUNCDEF" >int mysql_connect</CODE >(string [<SPAN CLASS="optional" >hostname [<SPAN CLASS="optional" >:port</SPAN >] [<SPAN CLASS="optional" >:/path/to/socket</SPAN >] </SPAN >] , string [<SPAN CLASS="optional" >username</SPAN >] , string [<SPAN CLASS="optional" >password</SPAN >] );<P ></P ></DIV ><P > Returns: A positive MySQL link identifier on success, or an error message on failure. </P ><P > <B CLASS="function" >mysql_connect()</B > establishes a connection to a MySQL server. All of the arguments are optional, and if they're missing, defaults are assumed ('localhost', user name of the user that owns the server process, empty password). </P ><P > The hostname string can also include a port number. eg. "hostname:port" or a path to a socket eg. ":/path/to/socket" for the localhost. <DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >Note: </B > Support for ":port" was added in PHP 3.0B4. </P ><P > Support for the ":/path/to/socket" was added in PHP 3.0.10. </P ><P > You can suppress the error message on failure by prepending '@' to the function name. </P ></BLOCKQUOTE ></DIV > </P ><P > In case a second call is made to <B CLASS="function" >mysql_connect()</B > with the same arguments, no new link will be established, but instead, the link identifier of the already opened link will be returned. </P ><P > The link to the server will be closed as soon as the execution of the script ends, unless it's closed earlier by explicitly calling <A HREF="function.mysql-close.html" ><B CLASS="function" >mysql_close()</B ></A >. </P ><TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><P ><B >Example 1. MySQL connect example</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" WIDTH="100%" ><TR ><TD ><PRE CLASS="programlisting" > 1 2 <?php 3 $link = mysql_connect ("kraemer", "marliesle", "secret") { 4 or die ("Could not connect"); 5 } 6 print ("Connected successfully"); 7 mysql_close ($link); 8 ?> 9 </PRE ></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE ><P > See also <A HREF="function.mysql-pconnect.html" ><B CLASS="function" >mysql_pconnect()</B ></A >, and <A HREF="function.mysql-close.html" ><B CLASS="function" >mysql_close()</B ></A >. </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="function.mysql-close.html" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="manual.html" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.mysql-create-db.html" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >mysql_close</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.mysql.html" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >mysql_create_db</TD ></TR ></TABLE ></DIV ></BODY ></HTML >