📄 function.dbx-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 connection/database</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.dbx-compare.html">dbx_compare</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.dbx-error.html">dbx_error</a></div> <div class="up"><a href="ref.dbx.html">dbx Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.dbx-connect" class="refentry"> <div class="refnamediv"> <h1 class="refname">dbx_connect</h1> <p class="verinfo">(PHP 4 >= 4.0.6, PHP 5 <= 5.0.5, PECL dbx:1.1.0)</p><p class="refpurpose"><span class="refname">dbx_connect</span> — <span class="dc-title">Open a connection/database</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">object</span> <span class="methodname"><b><b>dbx_connect</b></b></span> ( <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <tt class="parameter">$module</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$host</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$database</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$username</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$password</tt></span> [, <span class="methodparam"><span class="type">int</span> <tt class="parameter">$persistent</tt></span> ] )</div> <p class="para rdfs-comment"> Opens a connection to a database. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">module</tt></i></span> <dd> <p class="para"> The <i><tt class="parameter">module</tt></i> parameter can be either a string or a constant, though the latter form is preferred. The possible values are given below, but keep in mind that they only work if the module is actually loaded. </p> <p class="para"> <ul class="itemizedlist"> <li class="listitem"> <span class="simpara"> <b><tt>DBX_MYSQL</tt></b> or "mysql" </span> </li> <li class="listitem"> <span class="simpara"> <b><tt>DBX_ODBC</tt></b> or "odbc" </span> </li> <li class="listitem"> <span class="simpara"> <b><tt>DBX_PGSQL</tt></b> or "pgsql" </span> </li> <li class="listitem"> <span class="simpara"> <b><tt>DBX_MSSQL</tt></b> or "mssql" </span> </li> <li class="listitem"> <span class="simpara"> <b><tt>DBX_FBSQL</tt></b> or "fbsql" (available from PHP 4.1.0) </span> </li> <li class="listitem"> <span class="simpara"> <b><tt>DBX_SYBASECT</tt></b> or "sybase_ct" (available from PHP 4.2.0) </span> </li> <li class="listitem"> <span class="simpara"> <b><tt>DBX_OCI8</tt></b> or "oci8" (available from PHP 4.3.0) </span> </li> <li class="listitem"> <span class="simpara"> <b><tt>DBX_SQLITE</tt></b> or "sqlite" (PHP 5) </span> </li> </ul> </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">host</tt></i></span> <dd> <p class="para"> The SQL server host </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">database</tt></i></span> <dd> <p class="para"> The database name </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">username</tt></i></span> <dd> <p class="para"> The username </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">password</tt></i></span> <dd> <p class="para"> The password </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">persistent</tt></i></span> <dd> <p class="para"> The <i><tt class="parameter">persistent</tt></i> parameter can be set to <b><tt>DBX_PERSISTENT</tt></b>, if so, a persistent connection will be created. </p> </dd> </dt> </dl> </p> <p class="para"> The <i><tt class="parameter">host</tt></i>, <i><tt class="parameter">database</tt></i>, <i><tt class="parameter">username</tt></i> and <i><tt class="parameter">password</tt></i> parameters are expected, but not always used depending on the connect functions for the abstracted module. </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns an object on success, <b><tt>FALSE</tt></b> on error. If a connection has been made but the database could not be selected, the connection is closed and <b><tt>FALSE</tt></b> is returned. </p> <p class="para"> The returned <var class="varname">object</var> has three properties: <dl> <dt> <span class="term"> <span class="property">database</span> </span> <dd> <span class="simpara"> It is the name of the currently selected database. </span> </dd> </dt> <dt> <span class="term"> <span class="property">handle</span> </span> <dd> <p class="para"> It is a valid handle for the connected database, and as such it can be used in module-specific functions (if required). <div class="informalexample"> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br />$link </span><span style="color: #007700">= </span><span style="color: #0000BB">dbx_connect</span><span style="color: #007700">(</span><span style="color: #0000BB">DBX_MYSQL</span><span style="color: #007700">, </span><span style="color: #DD0000">"localhost"</span><span style="color: #007700">, </span><span style="color: #DD0000">"db"</span><span style="color: #007700">, </span><span style="color: #DD0000">"username"</span><span style="color: #007700">, </span><span style="color: #DD0000">"password"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">mysql_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">-></span><span style="color: #0000BB">handle</span><span style="color: #007700">); </span><span style="color: #FF8000">// dbx_close($link) would be better here<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> </p> </dd> </dt> <dt> <span class="term"> <span class="property">module</span> </span> <dd> <span class="simpara"> It is used internally by dbx only, and is actually the module number mentioned above. </span> </dd> </dt> </dl> </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>dbx_connect()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br />$link </span><span style="color: #007700">= </span><span style="color: #0000BB">dbx_connect</span><span style="color: #007700">(</span><span style="color: #0000BB">DBX_ODBC</span><span style="color: #007700">, </span><span style="color: #DD0000">""</span><span style="color: #007700">, </span><span style="color: #DD0000">"db"</span><span style="color: #007700">, </span><span style="color: #DD0000">"username"</span><span style="color: #007700">, </span><span style="color: #DD0000">"password"</span><span style="color: #007700">, </span><span style="color: #0000BB">DBX_PERSISTENT</span><span style="color: #007700">)<br /> or die(</span><span style="color: #DD0000">"Could not connect"</span><span style="color: #007700">);<br /><br />echo </span><span style="color: #DD0000">"Connected successfully"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">dbx_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> </div> <div class="refsect1 notes"> <h3 class="title">Notes</h3> <blockquote><p><b class="note">Note</b>: Always refer to the module-specific documentation as well. <br /> </p></blockquote> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.dbx-close.html" class="function" rel="rdfs-seeAlso">dbx_close()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.dbx-compare.html">dbx_compare</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.dbx-error.html">dbx_error</a></div> <div class="up"><a href="ref.dbx.html">dbx 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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