📄 function.maxdb-connect.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Open a new connection to the MaxDB server</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.maxdb-connect-error.html">maxdb_connect_error</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.maxdb-data-seek.html">maxdb_data_seek</a></div> <div class="up"><a href="ref.maxdb.html">MaxDB Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.maxdb-connect" class="refentry"> <div class="refnamediv"> <h1 class="refname">maxdb_connect</h1> <h1 class="refname">maxdb</h1> <p class="verinfo">(PECL maxdb:1.0-7.6.00.38)</p><p class="refpurpose"><span class="refname">maxdb_connect</span> -- <span class="refname">maxdb</span> — <span class="dc-title">Open a new connection to the MaxDB server</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <p class="para">Procedural style</p> <div class="methodsynopsis dc-description"> <span class="type">resource</span> <span class="methodname"><b><b>maxdb_connect</b></b></span> ([ <span class="methodparam"><span class="type">string</span> <tt class="parameter">$host</tt></span> [, <span class="methodparam"><span class="type">string</span> <tt class="parameter">$username</tt></span> [, <span class="methodparam"><span class="type">string</span> <tt class="parameter">$passwd</tt></span> [, <span class="methodparam"><span class="type">string</span> <tt class="parameter">$dbname</tt></span> [, <span class="methodparam"><span class="type">int</span> <tt class="parameter">$port</tt></span> [, <span class="methodparam"><span class="type">string</span> <tt class="parameter">$socket</tt></span> ]]]]]] )</div> <p class="para rdfs-comment">Object oriented style (constructor):</p> <div class="classsynopsis"> <div class="ooclass"><b class="classname">maxdb</b></div> <div class="constructorsynopsis dc-description"> <span class="methodname"><b><b>__construct</b></b></span> ([ <span class="methodparam"><span class="type">string</span> <tt class="parameter">$host</tt></span> [, <span class="methodparam"><span class="type">string</span> <tt class="parameter">$username</tt></span> [, <span class="methodparam"><span class="type">string</span> <tt class="parameter">$passwd</tt></span> [, <span class="methodparam"><span class="type">string</span> <tt class="parameter">$dbname</tt></span> [, <span class="methodparam"><span class="type">int</span> <tt class="parameter">$port</tt></span> [, <span class="methodparam"><span class="type">string</span> <tt class="parameter">$socket</tt></span> ]]]]]] )</div> </div> <p class="para"> The <b>maxdb_connect()</b> function attempts to open a connection to the MaxDB Server running on <i><tt class="parameter">host</tt></i> which can be either a host name or an IP address. Passing the string "localhost" to this parameter, the local host is assumed. If successful, the <b>maxdb_connect()</b> will return an resource representing the connection to the database, or <b><tt>FALSE</tt></b> on failure. </p> <p class="para"> The <i><tt class="parameter">username</tt></i> and <i><tt class="parameter">password</tt></i> parameters specify the username and password under which to connect to the MaxDB server. If the password is not provided (the <b><tt>NULL</tt></b> value is passed), the MaxDB server will attempt to authenticate the user against the <i><tt class="parameter">maxdb.default_pw</tt></i> in <var class="filename">php.ini</var>. </p> <p class="para"> The <i><tt class="parameter">dbname</tt></i> parameter if provided will specify the default database to be used when performing queries. If not provied, the entry <i><tt class="parameter">maxdb.default_db</tt></i> in <var class="filename">php.ini</var> is used. </p> <p class="para"> The <i><tt class="parameter">port</tt></i> and <i><tt class="parameter">socket</tt></i> parameters are ignored for the MaxDB server. </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns a resource which represents the connection to a MaxDB Server or <b><tt>FALSE</tt></b> if the connection failed. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <div class="example"> <p><b>Example #1 Object oriented style</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br />$maxdb </span><span style="color: #007700">= new </span><span style="color: #0000BB">maxdb</span><span style="color: #007700">(</span><span style="color: #DD0000">"localhost"</span><span style="color: #007700">, </span><span style="color: #DD0000">"MONA"</span><span style="color: #007700">, </span><span style="color: #DD0000">"RED"</span><span style="color: #007700">, </span><span style="color: #DD0000">"DEMODB"</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* check connection */<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">maxdb_connect_errno</span><span style="color: #007700">()) {<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Connect failed: %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">maxdb_connect_error</span><span style="color: #007700">());<br /> exit();<br />}<br /><br /></span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Host information: %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">$maxdb</span><span style="color: #007700">-></span><span style="color: #0000BB">host_info</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* close connection */<br /></span><span style="color: #0000BB">$maxdb</span><span style="color: #007700">-></span><span style="color: #0000BB">close</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> <div class="example"> <p><b>Example #2 Procedural style</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br />$link </span><span style="color: #007700">= </span><span style="color: #0000BB">maxdb_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"localhost"</span><span style="color: #007700">, </span><span style="color: #DD0000">"MONA"</span><span style="color: #007700">, </span><span style="color: #DD0000">"RED"</span><span style="color: #007700">, </span><span style="color: #DD0000">"DEMODB"</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* check connection */<br /></span><span style="color: #007700">if (!</span><span style="color: #0000BB">$link</span><span style="color: #007700">) {<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Connect failed: %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">maxdb_connect_error</span><span style="color: #007700">());<br /> exit();<br />}<br /><br /></span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Host information: %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">maxdb_get_host_info</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">));<br /><br /></span><span style="color: #FF8000">/* close connection */<br /></span><span style="color: #0000BB">maxdb_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> <p class="para">The above example will output something similar to:</p> <div class="example-contents"><pre><div class="cdata"><pre>Host information: localhost</pre></div> </pre></div> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.maxdb-connect-error.html">maxdb_connect_error</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.maxdb-data-seek.html">maxdb_data_seek</a></div> <div class="up"><a href="ref.maxdb.html">MaxDB Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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