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Diffstat (limited to 'user_guide/database/utilities.html')
| -rw-r--r-- | user_guide/database/utilities.html | 588 |
1 files changed, 294 insertions, 294 deletions
diff --git a/user_guide/database/utilities.html b/user_guide/database/utilities.html index e6847b37a..6d3f6f312 100644 --- a/user_guide/database/utilities.html +++ b/user_guide/database/utilities.html @@ -1,295 +1,295 @@ -<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
-<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
-<head>
-
-<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
-<title>Database Utility Class : CodeIgniter User Guide</title>
-
-<style type='text/css' media='all'>@import url('../userguide.css');</style>
-<link rel='stylesheet' type='text/css' media='all' href='../userguide.css' />
-
-<script type="text/javascript" src="../nav/nav.js"></script>
-<script type="text/javascript" src="../nav/prototype.lite.js"></script>
-<script type="text/javascript" src="../nav/moo.fx.js"></script>
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-<meta http-equiv= 'pragma' content='no-cache' />
-<meta name='robots' content='all' />
-<meta name='author' content='ExpressionEngine Dev Team' />
-<meta name='description' content='CodeIgniter User Guide' />
-
-</head>
-<body>
-
-<!-- START NAVIGATION -->
-<div id="nav"><div id="nav_inner"><script type="text/javascript">create_menu('../');</script></div></div>
-<div id="nav2"><a name="top"></a><a href="javascript:void(0);" onclick="myHeight.toggle();"><img src="../images/nav_toggle_darker.jpg" width="154" height="43" border="0" title="Toggle Table of Contents" alt="Toggle Table of Contents" /></a></div>
-<div id="masthead">
-<table cellpadding="0" cellspacing="0" border="0" style="width:100%">
-<tr>
-<td><h1>CodeIgniter User Guide Version 1.7</h1></td>
-<td id="breadcrumb_right"><a href="../toc.html">Table of Contents Page</a></td>
-</tr>
-</table>
-</div>
-<!-- END NAVIGATION -->
-
-
-<!-- START BREADCRUMB -->
-<table cellpadding="0" cellspacing="0" border="0" style="width:100%">
-<tr>
-<td id="breadcrumb">
-<a href="http://codeigniter.com/">CodeIgniter Home</a> ›
-<a href="../index.html">User Guide Home</a> ›
-<a href="index.html">Database Library</a> ›
-Database Utility Class
-</td>
-<td id="searchbox"><form method="get" action="http://www.google.com/search"><input type="hidden" name="as_sitesearch" id="as_sitesearch" value="codeigniter.com/user_guide/" />Search User Guide <input type="text" class="input" style="width:200px;" name="q" id="q" size="31" maxlength="255" value="" /> <input type="submit" class="submit" name="sa" value="Go" /></form></td>
-</tr>
-</table>
-<!-- END BREADCRUMB -->
-
-
-<br clear="all" />
-
-
-<!-- START CONTENT -->
-<div id="content">
-
-<h1>Database Utility Class</h1>
-
-<p>The Database Utility Class contains functions that help you manage your database.</p>
-
-<h3>Table of Contents</h3>
-
-<ul>
-<li><a href="#init">Initializing the Utility Class</a></li>
-<li><a href="#list">Listing your Databases</a></li>
-<li><a href="#opttb">Optimizing your Tables</a></li>
-<li><a href="#repair">Repairing your Databases</a></li>
-<li><a href="#optdb">Optimizing your Database</a></li>
-<li><a href="#csv">CSV Files from a Database Result</a></li>
-<li><a href="#xml">XML Files from a Database Result</a></li>
-<li><a href="#backup">Backing up your Database</a></li>
-</ul>
-
-
-
-<h2><a name="init"></a>Initializing the Utility Class</h2>
-
-<p class="important"><strong>Important:</strong> In order to initialize the Utility class, your database driver must
-already be running, since the utilities class relies on it.</p>
-
-<p>Load the Utility Class as follows:</p>
-
-<code>$this->load->dbutil()</code>
-
-<p>Once initialized you will access the functions using the <dfn>$this->dbutil</dfn> object:</p>
-
-<code>$this->dbutil->some_function()</code>
-
-<h2><a name="list"></a>$this->dbutil->list_databases()</h2>
-<p>Returns an array of database names:</p>
-
-<code>
-$dbs = $this->dbutil->list_databases();<br />
-<br />
-foreach($dbs as $db)<br />
-{<br />
- echo $db;<br />
-}</code>
-<h2><a name="opttb"></a>$this->dbutil->optimize_table('table_name');</h2>
-
-<p class="important"><strong>Note:</strong> This features is only available for MySQL/MySQLi databases.</p>
-
-
-<p>Permits you to optimize a table using the table name specified in the first parameter. Returns TRUE/FALSE based on success or failure:</p>
-
-<code>
-if ($this->dbutil->optimize_table('table_name'))<br />
-{<br />
- echo 'Success!';<br />
-}
-</code>
-
-<p><strong>Note:</strong> Not all database platforms support table optimization.</p>
-
-
-<h2><a name="repair"></a>$this->dbutil->repair_table('table_name');</h2>
-
-<p class="important"><strong>Note:</strong> This features is only available for MySQL/MySQLi databases.</p>
-
-
-<p>Permits you to repair a table using the table name specified in the first parameter. Returns TRUE/FALSE based on success or failure:</p>
-
-<code>
-if ($this->dbutil->repair_table('table_name'))<br />
-{<br />
- echo 'Success!';<br />
-}
-</code>
-
-<p><strong>Note:</strong> Not all database platforms support table repairs.</p>
-
-
-<h2><a name="optdb"></a>$this->dbutil->optimize_database();</h2>
-
-<p class="important"><strong>Note:</strong> This features is only available for MySQL/MySQLi databases.</p>
-
-<p>Permits you to optimize the database your DB class is currently connected to. Returns an array containing the DB status messages or FALSE on failure.</p>
-
-<code>
-$result = $this->dbutil->optimize_database();<br />
-<br />
-if ($result !== FALSE)<br />
-{<br />
- print_r($result);<br />
-}
-</code>
-
-<p><strong>Note:</strong> Not all database platforms support table optimization.</p>
-
-
-<h2><a name="csv"></a>$this->dbutil->csv_from_result($db_result)</h2>
-
-<p>Permits you to generate a CSV file from a query result. The first parameter of the function must contain the result object from your query.
-Example:</p>
-
-<code>
-$this->load->dbutil();<br />
-<br />
-$query = $this->db->query("SELECT * FROM mytable");<br />
-<br />
-echo $this->dbutil->csv_from_result($query);
-</code>
-
-<p>The second and third parameters allows you to
-set the delimiter and newline character. By default tabs are used as the delimiter and "\n" is used as a new line. Example:</p>
-
-<code>
-$delimiter = ",";<br />
-$newline = "\r\n";<br />
-<br />
-echo $this->dbutil->csv_from_result($query, $delimiter, $newline);
-</code>
-
-<p><strong>Important:</strong> This function will NOT write the CSV file for you. It simply creates the CSV layout.
-If you need to write the file use the <a href="../helpers/file_helper.html">File Helper</a>.</p>
-
-
-<h2><a name="xml"></a>$this->dbutil->xml_from_result($db_result)</h2>
-
-<p>Permits you to generate an XML file from a query result. The first parameter expects a query result object, the second
-may contain an optional array of config parameters. Example:</p>
-
-<code>
-$this->load->dbutil();<br />
-<br />
-$query = $this->db->query("SELECT * FROM mytable");<br />
-<br />
-$config = array (<br />
- 'root' => 'root',<br />
- 'element' => 'element', <br />
- 'newline' => "\n", <br />
- 'tab' => "\t"<br />
- );<br />
-<br />
-echo $this->dbutil->xml_from_result($query, $config);
-</code>
-
-<p><strong>Important:</strong> This function will NOT write the XML file for you. It simply creates the XML layout.
-If you need to write the file use the <a href="../helpers/file_helper.html">File Helper</a>.</p>
-
-
-<h2><a name="backup"></a>$this->dbutil->backup()</h2>
-
-<p>Permits you to backup your full database or individual tables. The backup data can be compressed in either Zip or Gzip format.</p>
-
-<p class="important"><strong>Note:</strong> This features is only available for MySQL databases.</p>
-
-<p>Note: Due to the limited execution time and memory available to PHP, backing up very large
-databases may not be possible. If your database is very large you might need to backup directly from your SQL server
-via the command line, or have your server admin do it for you if you do not have root privileges.</p>
-
-<h3>Usage Example</h3>
-
-<code>
-<dfn>// Load the DB utility class</dfn><br />
-$this->load->dbutil();<br /><br />
-
-<dfn>// Backup your entire database and assign it to a variable</dfn><br />
-$backup =& $this->dbutil->backup();
-
-<br /><br />
-<dfn>// Load the file helper and write the file to your server</dfn><br />
-$this->load->helper('file');<br />
-write_file('/path/to/mybackup.gz', $backup);
-
-<br /><br />
-<dfn>// Load the download helper and send the file to your desktop</dfn><br />
-$this->load->helper('download');<br />
-force_download('mybackup.gz', $backup);
-</code>
-
-<h3>Setting Backup Preferences</h3>
-
-<p>Backup preferences are set by submitting an array of values to the first parameter of the backup function. Example:</p>
-
-<code>$prefs = array(<br />
- 'tables' => array('table1', 'table2'), // Array of tables to backup.<br />
- 'ignore' => array(), // List of tables to omit from the backup<br />
- 'format' => 'txt', // gzip, zip, txt<br />
- 'filename' => 'mybackup.sql', // File name - NEEDED ONLY WITH ZIP FILES<br />
- 'add_drop' => TRUE, // Whether to add DROP TABLE statements to backup file<br />
- 'add_insert' => TRUE, // Whether to add INSERT data to backup file<br />
- 'newline' => "\n" // Newline character used in backup file<br />
- );<br />
-<br />
-$this->dbutil->backup($prefs);
-</code>
-
-
-<h3>Description of Backup Preferences</h3>
-
-<table cellpadding="0" cellspacing="1" border="0" style="width:100%" class="tableborder">
-<tr>
-<th>Preference</th>
-<th>Default Value</th>
-<th>Options</th>
-<th>Description</th>
-</tr><tr>
-<td class="td"><strong>tables</strong></td><td class="td">empty array</td><td class="td">None</td><td class="td">An array of tables you want backed up. If left blank all tables will be exported.</td>
-</tr><tr>
-<td class="td"><strong>ignore</strong></td><td class="td">empty array</td><td class="td">None</td><td class="td">An array of tables you want the backup routine to ignore.</td>
-</tr><tr>
-<td class="td"><strong>format</strong></td><td class="td">gzip</td><td class="td">gzip, zip, txt</td><td class="td">The file format of the export file.</td>
-</tr><tr>
-<td class="td"><strong>filename</strong></td><td class="td">the current date/time</td><td class="td">None</td><td class="td">The name of the backed-up file. The name is needed only if you are using zip compression.</td>
-</tr><tr>
-<td class="td"><strong>add_drop</strong></td><td class="td">TRUE</td><td class="td">TRUE/FALSE</td><td class="td">Whether to include DROP TABLE statements in your SQL export file.</td>
-</tr><tr>
-<td class="td"><strong>add_insert</strong></td><td class="td">TRUE</td><td class="td">TRUE/FALSE</td><td class="td">Whether to include INSERT statements in your SQL export file.</td>
-</tr><tr>
-<td class="td"><strong>newline</strong></td><td class="td">"\n"</td><td class="td">"\n", "\r", "\r\n"</td><td class="td">Type of newline to use in your SQL export file.</td>
-
-</tr>
-</table>
-
-
-</div>
-<!-- END CONTENT -->
-
-
-<div id="footer">
-<p>
-Previous Topic: <a href="forge.html">DB Forge Class</a>
- ·
-<a href="#top">Top of Page</a> ·
-<a href="../index.html">User Guide Home</a> ·
-Next Topic: <a href="../libraries/email.html"> Email Class</a></p>
-<p><a href="http://codeigniter.com">CodeIgniter</a> · Copyright © 2006-2008 · <a href="http://ellislab.com/">Ellislab, Inc.</a></p>
-</div>
-
-</body>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> +<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> +<head> + +<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> +<title>Database Utility Class : CodeIgniter User Guide</title> + +<style type='text/css' media='all'>@import url('../userguide.css');</style> +<link rel='stylesheet' type='text/css' media='all' href='../userguide.css' /> + +<script type="text/javascript" src="../nav/nav.js"></script> +<script type="text/javascript" src="../nav/prototype.lite.js"></script> +<script type="text/javascript" src="../nav/moo.fx.js"></script> +<script type="text/javascript" src="../nav/user_guide_menu.js"></script> + +<meta http-equiv='expires' content='-1' /> +<meta http-equiv= 'pragma' content='no-cache' /> +<meta name='robots' content='all' /> +<meta name='author' content='ExpressionEngine Dev Team' /> +<meta name='description' content='CodeIgniter User Guide' /> + +</head> +<body> + +<!-- START NAVIGATION --> +<div id="nav"><div id="nav_inner"><script type="text/javascript">create_menu('../');</script></div></div> +<div id="nav2"><a name="top"></a><a href="javascript:void(0);" onclick="myHeight.toggle();"><img src="../images/nav_toggle_darker.jpg" width="154" height="43" border="0" title="Toggle Table of Contents" alt="Toggle Table of Contents" /></a></div> +<div id="masthead"> +<table cellpadding="0" cellspacing="0" border="0" style="width:100%"> +<tr> +<td><h1>CodeIgniter User Guide Version 1.7</h1></td> +<td id="breadcrumb_right"><a href="../toc.html">Table of Contents Page</a></td> +</tr> +</table> +</div> +<!-- END NAVIGATION --> + + +<!-- START BREADCRUMB --> +<table cellpadding="0" cellspacing="0" border="0" style="width:100%"> +<tr> +<td id="breadcrumb"> +<a href="http://codeigniter.com/">CodeIgniter Home</a> › +<a href="../index.html">User Guide Home</a> › +<a href="index.html">Database Library</a> › +Database Utility Class +</td> +<td id="searchbox"><form method="get" action="http://www.google.com/search"><input type="hidden" name="as_sitesearch" id="as_sitesearch" value="codeigniter.com/user_guide/" />Search User Guide <input type="text" class="input" style="width:200px;" name="q" id="q" size="31" maxlength="255" value="" /> <input type="submit" class="submit" name="sa" value="Go" /></form></td> +</tr> +</table> +<!-- END BREADCRUMB --> + + +<br clear="all" /> + + +<!-- START CONTENT --> +<div id="content"> + +<h1>Database Utility Class</h1> + +<p>The Database Utility Class contains functions that help you manage your database.</p> + +<h3>Table of Contents</h3> + +<ul> +<li><a href="#init">Initializing the Utility Class</a></li> +<li><a href="#list">Listing your Databases</a></li> +<li><a href="#opttb">Optimizing your Tables</a></li> +<li><a href="#repair">Repairing your Databases</a></li> +<li><a href="#optdb">Optimizing your Database</a></li> +<li><a href="#csv">CSV Files from a Database Result</a></li> +<li><a href="#xml">XML Files from a Database Result</a></li> +<li><a href="#backup">Backing up your Database</a></li> +</ul> + + + +<h2><a name="init"></a>Initializing the Utility Class</h2> + +<p class="important"><strong>Important:</strong> In order to initialize the Utility class, your database driver must +already be running, since the utilities class relies on it.</p> + +<p>Load the Utility Class as follows:</p> + +<code>$this->load->dbutil()</code> + +<p>Once initialized you will access the functions using the <dfn>$this->dbutil</dfn> object:</p> + +<code>$this->dbutil->some_function()</code> + +<h2><a name="list"></a>$this->dbutil->list_databases()</h2> +<p>Returns an array of database names:</p> + +<code> +$dbs = $this->dbutil->list_databases();<br /> +<br /> +foreach($dbs as $db)<br /> +{<br /> + echo $db;<br /> +}</code> +<h2><a name="opttb"></a>$this->dbutil->optimize_table('table_name');</h2> + +<p class="important"><strong>Note:</strong> This features is only available for MySQL/MySQLi databases.</p> + + +<p>Permits you to optimize a table using the table name specified in the first parameter. Returns TRUE/FALSE based on success or failure:</p> + +<code> +if ($this->dbutil->optimize_table('table_name'))<br /> +{<br /> + echo 'Success!';<br /> +} +</code> + +<p><strong>Note:</strong> Not all database platforms support table optimization.</p> + + +<h2><a name="repair"></a>$this->dbutil->repair_table('table_name');</h2> + +<p class="important"><strong>Note:</strong> This features is only available for MySQL/MySQLi databases.</p> + + +<p>Permits you to repair a table using the table name specified in the first parameter. Returns TRUE/FALSE based on success or failure:</p> + +<code> +if ($this->dbutil->repair_table('table_name'))<br /> +{<br /> + echo 'Success!';<br /> +} +</code> + +<p><strong>Note:</strong> Not all database platforms support table repairs.</p> + + +<h2><a name="optdb"></a>$this->dbutil->optimize_database();</h2> + +<p class="important"><strong>Note:</strong> This features is only available for MySQL/MySQLi databases.</p> + +<p>Permits you to optimize the database your DB class is currently connected to. Returns an array containing the DB status messages or FALSE on failure.</p> + +<code> +$result = $this->dbutil->optimize_database();<br /> +<br /> +if ($result !== FALSE)<br /> +{<br /> + print_r($result);<br /> +} +</code> + +<p><strong>Note:</strong> Not all database platforms support table optimization.</p> + + +<h2><a name="csv"></a>$this->dbutil->csv_from_result($db_result)</h2> + +<p>Permits you to generate a CSV file from a query result. The first parameter of the function must contain the result object from your query. +Example:</p> + +<code> +$this->load->dbutil();<br /> +<br /> +$query = $this->db->query("SELECT * FROM mytable");<br /> +<br /> +echo $this->dbutil->csv_from_result($query); +</code> + +<p>The second and third parameters allows you to +set the delimiter and newline character. By default tabs are used as the delimiter and "\n" is used as a new line. Example:</p> + +<code> +$delimiter = ",";<br /> +$newline = "\r\n";<br /> +<br /> +echo $this->dbutil->csv_from_result($query, $delimiter, $newline); +</code> + +<p><strong>Important:</strong> This function will NOT write the CSV file for you. It simply creates the CSV layout. +If you need to write the file use the <a href="../helpers/file_helper.html">File Helper</a>.</p> + + +<h2><a name="xml"></a>$this->dbutil->xml_from_result($db_result)</h2> + +<p>Permits you to generate an XML file from a query result. The first parameter expects a query result object, the second +may contain an optional array of config parameters. Example:</p> + +<code> +$this->load->dbutil();<br /> +<br /> +$query = $this->db->query("SELECT * FROM mytable");<br /> +<br /> +$config = array (<br /> + 'root' => 'root',<br /> + 'element' => 'element', <br /> + 'newline' => "\n", <br /> + 'tab' => "\t"<br /> + );<br /> +<br /> +echo $this->dbutil->xml_from_result($query, $config); +</code> + +<p><strong>Important:</strong> This function will NOT write the XML file for you. It simply creates the XML layout. +If you need to write the file use the <a href="../helpers/file_helper.html">File Helper</a>.</p> + + +<h2><a name="backup"></a>$this->dbutil->backup()</h2> + +<p>Permits you to backup your full database or individual tables. The backup data can be compressed in either Zip or Gzip format.</p> + +<p class="important"><strong>Note:</strong> This features is only available for MySQL databases.</p> + +<p>Note: Due to the limited execution time and memory available to PHP, backing up very large +databases may not be possible. If your database is very large you might need to backup directly from your SQL server +via the command line, or have your server admin do it for you if you do not have root privileges.</p> + +<h3>Usage Example</h3> + +<code> +<dfn>// Load the DB utility class</dfn><br /> +$this->load->dbutil();<br /><br /> + +<dfn>// Backup your entire database and assign it to a variable</dfn><br /> +$backup =& $this->dbutil->backup(); + +<br /><br /> +<dfn>// Load the file helper and write the file to your server</dfn><br /> +$this->load->helper('file');<br /> +write_file('/path/to/mybackup.gz', $backup); + +<br /><br /> +<dfn>// Load the download helper and send the file to your desktop</dfn><br /> +$this->load->helper('download');<br /> +force_download('mybackup.gz', $backup); +</code> + +<h3>Setting Backup Preferences</h3> + +<p>Backup preferences are set by submitting an array of values to the first parameter of the backup function. Example:</p> + +<code>$prefs = array(<br /> + 'tables' => array('table1', 'table2'), // Array of tables to backup.<br /> + 'ignore' => array(), // List of tables to omit from the backup<br /> + 'format' => 'txt', // gzip, zip, txt<br /> + 'filename' => 'mybackup.sql', // File name - NEEDED ONLY WITH ZIP FILES<br /> + 'add_drop' => TRUE, // Whether to add DROP TABLE statements to backup file<br /> + 'add_insert' => TRUE, // Whether to add INSERT data to backup file<br /> + 'newline' => "\n" // Newline character used in backup file<br /> + );<br /> +<br /> +$this->dbutil->backup($prefs); +</code> + + +<h3>Description of Backup Preferences</h3> + +<table cellpadding="0" cellspacing="1" border="0" style="width:100%" class="tableborder"> +<tr> +<th>Preference</th> +<th>Default Value</th> +<th>Options</th> +<th>Description</th> +</tr><tr> +<td class="td"><strong>tables</strong></td><td class="td">empty array</td><td class="td">None</td><td class="td">An array of tables you want backed up. If left blank all tables will be exported.</td> +</tr><tr> +<td class="td"><strong>ignore</strong></td><td class="td">empty array</td><td class="td">None</td><td class="td">An array of tables you want the backup routine to ignore.</td> +</tr><tr> +<td class="td"><strong>format</strong></td><td class="td">gzip</td><td class="td">gzip, zip, txt</td><td class="td">The file format of the export file.</td> +</tr><tr> +<td class="td"><strong>filename</strong></td><td class="td">the current date/time</td><td class="td">None</td><td class="td">The name of the backed-up file. The name is needed only if you are using zip compression.</td> +</tr><tr> +<td class="td"><strong>add_drop</strong></td><td class="td">TRUE</td><td class="td">TRUE/FALSE</td><td class="td">Whether to include DROP TABLE statements in your SQL export file.</td> +</tr><tr> +<td class="td"><strong>add_insert</strong></td><td class="td">TRUE</td><td class="td">TRUE/FALSE</td><td class="td">Whether to include INSERT statements in your SQL export file.</td> +</tr><tr> +<td class="td"><strong>newline</strong></td><td class="td">"\n"</td><td class="td">"\n", "\r", "\r\n"</td><td class="td">Type of newline to use in your SQL export file.</td> + +</tr> +</table> + + +</div> +<!-- END CONTENT --> + + +<div id="footer"> +<p> +Previous Topic: <a href="forge.html">DB Forge Class</a> + · +<a href="#top">Top of Page</a> · +<a href="../index.html">User Guide Home</a> · +Next Topic: <a href="../libraries/email.html"> Email Class</a></p> +<p><a href="http://codeigniter.com">CodeIgniter</a> · Copyright © 2006-2008 · <a href="http://ellislab.com/">Ellislab, Inc.</a></p> +</div> + +</body> </html>
\ No newline at end of file |