<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>List databases available on a MySQL server</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.mysql-insert-id.html">mysql_insert_id</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.mysql-list-fields.html">mysql_list_fields</a></div> <div class="up"><a href="ref.mysql.html">MySQL Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="function.mysql-list-dbs" class="refentry"> <div class="refnamediv"> <h1 class="refname">mysql_list_dbs</h1> <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">mysql_list_dbs</span> — <span class="dc-title">List databases available on a MySQL server</span></p> </div> <div id="function.mysql-list-dbs-refsynopsisdiv"> <div class="warning"><strong class="warning">Warning</strong> <p class="para">This extension is deprecated as of PHP 5.5.0, and will be removed in the future. Instead, the <a href="book.mysqli.html" class="link">MySQLi</a> or <a href="ref.pdo-mysql.html" class="link">PDO_MySQL</a> extension should be used. See also <a href="mysqlinfo.api.choosing.html" class="link">MySQL: choosing an API</a> guide and <a href="faq.databases.html#faq.databases.mysql.deprecated" class="link">related FAQ</a> for more information. Alternatives to this function include:</p> <ul class="simplelist"> <li class="member">SQL Query: <em>SHOW DATABASES</em></li> </ul> </div> </div> <div class="refsect1 description" id="refsect1-function.mysql-list-dbs-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">resource</span> <span class="methodname"><strong>mysql_list_dbs</strong></span> ([ <span class="methodparam"><span class="type">resource</span> <code class="parameter">$link_identifier</code><span class="initializer"> = NULL</span></span> ] )</div> <p class="para rdfs-comment"> Returns a result pointer containing the databases available from the current mysql daemon. </p> <div class="warning"><strong class="warning">Warning</strong> <p class="simpara">This function has been <em class="emphasis">DEPRECATED</em> as of PHP 5.4.0. Relying on this function is highly discouraged.</p></div> </div> <div class="refsect1 parameters" id="refsect1-function.mysql-list-dbs-parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><em><code class="parameter"> link_identifier</code></em></span><dd> <p class="para">The MySQL connection. If the link identifier is not specified, the last link opened by <span class="function"><a href="function.mysql-connect.html" class="function">mysql_connect()</a></span> is assumed. If no such link is found, it will try to create one as if <span class="function"><a href="function.mysql-connect.html" class="function">mysql_connect()</a></span> was called with no arguments. If no connection is found or established, an <strong><code>E_WARNING</code></strong> level error is generated.</p></dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues" id="refsect1-function.mysql-list-dbs-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns a result pointer <span class="type"><a href="language.types.resource.html" class="type resource">resource</a></span> on success, or <strong><code>FALSE</code></strong> on failure. Use the <span class="function"><a href="function.mysql-tablename.html" class="function">mysql_tablename()</a></span> function to traverse this result pointer, or any function for result tables, such as <span class="function"><a href="function.mysql-fetch-array.html" class="function">mysql_fetch_array()</a></span>. </p> </div> <div class="refsect1 examples" id="refsect1-function.mysql-list-dbs-examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example" id="example-1601"> <p><strong>Example #1 <span class="function"><strong>mysql_list_dbs()</strong></span> example</strong></p> <div class="example-contents"> <div class="phpcode"><code><span style="color: #000000"> <span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">// Usage without mysql_list_dbs()<br /></span><span style="color: #0000BB">$link </span><span style="color: #007700">= </span><span style="color: #0000BB">mysql_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">'localhost'</span><span style="color: #007700">, </span><span style="color: #DD0000">'mysql_user'</span><span style="color: #007700">, </span><span style="color: #DD0000">'mysql_password'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$res </span><span style="color: #007700">= </span><span style="color: #0000BB">mysql_query</span><span style="color: #007700">(</span><span style="color: #DD0000">"SHOW DATABASES"</span><span style="color: #007700">);<br /><br />while (</span><span style="color: #0000BB">$row </span><span style="color: #007700">= </span><span style="color: #0000BB">mysql_fetch_assoc</span><span style="color: #007700">(</span><span style="color: #0000BB">$res</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #DD0000">'Database'</span><span style="color: #007700">] . </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #FF8000">// Deprecated as of PHP 5.4.0<br /></span><span style="color: #0000BB">$link </span><span style="color: #007700">= </span><span style="color: #0000BB">mysql_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">'localhost'</span><span style="color: #007700">, </span><span style="color: #DD0000">'mysql_user'</span><span style="color: #007700">, </span><span style="color: #DD0000">'mysql_password'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$db_list </span><span style="color: #007700">= </span><span style="color: #0000BB">mysql_list_dbs</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">);<br /><br />while (</span><span style="color: #0000BB">$row </span><span style="color: #007700">= </span><span style="color: #0000BB">mysql_fetch_object</span><span style="color: #007700">(</span><span style="color: #0000BB">$db_list</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #0000BB">$row</span><span style="color: #007700">-></span><span style="color: #0000BB">Database </span><span style="color: #007700">. </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />}<br /></span><span style="color: #0000BB">?></span> </span> </code></div> </div> <div class="example-contents"><p>The above example will output something similar to:</p></div> <div class="example-contents screen"> <div class="cdata"><pre> database1 database2 database3 </pre></div> </div> </div> </p> </div> <div class="refsect1 notes" id="refsect1-function.mysql-list-dbs-notes"> <h3 class="title">Notes</h3> <blockquote class="note"><p><strong class="note">Note</strong>: <p class="para"> For backward compatibility, the following deprecated alias may be used: <span class="function"><strong>mysql_listdbs()</strong></span> </p> </p></blockquote> </div> <div class="refsect1 seealso" id="refsect1-function.mysql-list-dbs-seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"> <span class="function"><a href="function.mysql-db-name.html" class="function" rel="rdfs-seeAlso">mysql_db_name()</a> - Retrieves database name from the call to mysql_list_dbs</span></li> <li class="member"> <span class="function"><a href="function.mysql-select-db.html" class="function" rel="rdfs-seeAlso">mysql_select_db()</a> - Select a MySQL database</span></li> </ul> </p> </div> </div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.mysql-insert-id.html">mysql_insert_id</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.mysql-list-fields.html">mysql_list_fields</a></div> <div class="up"><a href="ref.mysql.html">MySQL Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div></body></html>