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43e4a8a930
git-svn-id: http://svn.automattic.com/wordpress/trunk@601 1a063a9b-81f0-0310-95a4-ce76da25c4cd
402 lines
9.4 KiB
PHP
402 lines
9.4 KiB
PHP
<?php
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// ==================================================================
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// Author: Justin Vincent (justin@visunet.ie)
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// Web: http://php.justinvincent.com
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// Name: ezSQL
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// Desc: Class to make it very easy to deal with mySQL database connections.
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// WordPress is using this class to make the code cleaner and faster.
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// We highly recommend it.
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// We have modified the HTML it returns slightly.
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define('EZSQL_VERSION', '1.21');
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define('OBJECT', 'OBJECT', true);
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define('ARRAY_A', 'ARRAY_A', true);
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define('ARRAY_N', 'ARRAY_N', true);
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// The Main Class, renamed to avoid conflicts.
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class wpdb {
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var $debug_called;
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var $vardump_called;
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var $show_errors = true;
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// ==================================================================
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// DB Constructor - connects to the server and selects a database
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function wpdb($dbuser, $dbpassword, $dbname, $dbhost)
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{
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$this->dbh = @mysql_connect($dbhost,$dbuser,$dbpassword);
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if ( ! $this->dbh )
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{
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$this->print_error("<div id='error'>
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<p><strong>Error establishing a database connection!</strong></p>
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<ul>
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<li>Are you sure you have the correct user/password?</li>
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<li>Are you sure that you have typed the correct hostname?</li>
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<li>Are you sure that the database server is running?</li>
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</ul>
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</div>");
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}
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$this->select($dbname);
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}
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// ==================================================================
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// Select a DB (if another one needs to be selected)
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function select($db)
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{
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if ( !@mysql_select_db($db,$this->dbh))
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{
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$this->print_error("<ol id='error'>
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<li><strong>Error selecting database <u>$db</u>!</strong></li>
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<li>Are you sure it exists?</li>
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<li>Are you sure there is a valid database connection?</li>
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</ol>");
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}
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}
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// ====================================================================
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// Format a string correctly for safe insert under all PHP conditions
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function escape($str)
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{
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return mysql_escape_string(stripslashes($str));
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}
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// ==================================================================
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// Print SQL/DB error.
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function print_error($str = '')
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{
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// All errors go to the global error array $EZSQL_ERROR..
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global $EZSQL_ERROR;
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// If no special error string then use mysql default..
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if ( !$str ) $str = mysql_error();
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// Log this error to the global array..
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$EZSQL_ERROR[] = array
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(
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'query' => $this->last_query,
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'error_str' => $str
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);
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// Is error output turned on or not..
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if ( $this->show_errors )
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{
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// If there is an error then take note of it
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print "<div id='error'>
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<p><strong>SQL/DB Error:</strong><br />
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[<span style='color: #007;'>$str</span>]</p>
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</div>";
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}
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else
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{
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return false;
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}
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}
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// ==================================================================
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// Turn error handling on or off..
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function show_errors()
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{
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$this->show_errors = true;
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}
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function hide_errors()
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{
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$this->show_errors = false;
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}
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// ==================================================================
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// Kill cached query results
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function flush()
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{
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// Get rid of these
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$this->last_result = null;
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$this->col_info = null;
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$this->last_query = null;
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}
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// ==================================================================
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// Basic Query - see docs for more detail
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function query($query)
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{
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// Flush cached values..
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$this->flush();
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// Log how the function was called
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$this->func_call = "\$db->query(\"$query\")";
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// Keep track of the last query for debug..
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$this->last_query = $query;
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// Perform the query via std mysql_query function..
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$this->result = mysql_query($query, $this->dbh);
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++$this->querycount;
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// If there was an insert, delete or update see how many rows were affected
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// (Also, If there there was an insert take note of the insert_id
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$query_type = array('insert','delete','update','replace');
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// loop through the above array
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foreach ( $query_type as $word )
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{
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// This is true if the query starts with insert, delete or update
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if ( preg_match("/^\\s*$word /i",$query) )
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{
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$this->rows_affected = mysql_affected_rows();
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// This gets the insert ID
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if ( $word == 'insert' || $word == 'replace' )
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{
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$this->insert_id = mysql_insert_id($this->dbh);
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}
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$this->result = false;
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}
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}
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if ( mysql_error() )
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{
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// If there is an error then take note of it..
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$this->print_error();
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}
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else
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{
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// In other words if this was a select statement..
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if ( $this->result )
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{
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// =======================================================
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// Take note of column info
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$i=0;
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while ($i < @mysql_num_fields($this->result))
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{
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$this->col_info[$i] = @mysql_fetch_field($this->result);
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$i++;
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}
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// =======================================================
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// Store Query Results
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$i=0;
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while ( $row = @mysql_fetch_object($this->result) )
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{
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// Store relults as an objects within main array
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$this->last_result[$i] = $row;
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$i++;
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}
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// Log number of rows the query returned
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$this->num_rows = $i;
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@mysql_free_result($this->result);
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// If there were results then return true for $db->query
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if ( $i )
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{
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return true;
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}
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else
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{
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return false;
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}
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}
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else
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{
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// Update insert etc. was good..
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return true;
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}
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}
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}
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// ==================================================================
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// Get one variable from the DB - see docs for more detail
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function get_var($query=null, $x=0, $y=0)
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{
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// Log how the function was called
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$this->func_call = "\$db->get_var(\"$query\",$x,$y)";
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// If there is a query then perform it if not then use cached results..
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if ( $query )
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{
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$this->query($query);
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}
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// Extract var out of cached results based x,y vals
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if ( $this->last_result[$y] )
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{
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$values = array_values(get_object_vars($this->last_result[$y]));
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}
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// If there is a value return it else return null
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return (isset($values[$x]) && $values[$x]!=='')?$values[$x]:null;
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}
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// ==================================================================
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// Get one row from the DB - see docs for more detail
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function get_row($query=null, $output=OBJECT, $y=0)
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{
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// Log how the function was called
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$this->func_call = "\$db->get_row(\"$query\",$output,$y)";
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// If there is a query then perform it if not then use cached results..
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if ( $query )
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{
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$this->query($query);
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}
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// If the output is an object then return object using the row offset..
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if ( $output == OBJECT )
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{
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return $this->last_result[$y]?$this->last_result[$y]:null;
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}
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// If the output is an associative array then return row as such..
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elseif ( $output == ARRAY_A )
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{
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return $this->last_result[$y]?get_object_vars($this->last_result[$y]):null;
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}
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// If the output is an numerical array then return row as such..
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elseif ( $output == ARRAY_N )
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{
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return $this->last_result[$y]?array_values(get_object_vars($this->last_result[$y])):null;
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}
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// If invalid output type was specified..
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else
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{
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$this->print_error(" \$db->get_row(string query, output type, int offset) -- Output type must be one of: OBJECT, ARRAY_A, ARRAY_N");
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}
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}
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// ==================================================================
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// Function to get 1 column from the cached result set based in X index
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// se docs for usage and info
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function get_col($query=null,$x=0)
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{
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// If there is a query then perform it if not then use cached results..
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if ( $query )
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{
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$this->query($query);
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}
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// Extract the column values
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for ( $i=0; $i < count($this->last_result); $i++ )
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{
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$new_array[$i] = $this->get_var(null,$x,$i);
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}
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return $new_array;
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}
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// ==================================================================
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// Return the the query as a result set - see docs for more details
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function get_results($query=null, $output = OBJECT)
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{
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// Log how the function was called
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$this->func_call = "\$db->get_results(\"$query\", $output)";
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// If there is a query then perform it if not then use cached results..
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if ( $query )
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{
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$this->query($query);
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}
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// Send back array of objects. Each row is an object
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if ( $output == OBJECT )
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{
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return $this->last_result;
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}
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elseif ( $output == ARRAY_A || $output == ARRAY_N )
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{
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if ( $this->last_result )
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{
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$i=0;
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foreach( $this->last_result as $row )
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{
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$new_array[$i] = get_object_vars($row);
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if ( $output == ARRAY_N )
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{
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$new_array[$i] = array_values($new_array[$i]);
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}
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$i++;
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}
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return $new_array;
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}
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else
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{
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return null;
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}
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}
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}
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// ==================================================================
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// Function to get column meta data info pertaining to the last query
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// see docs for more info and usage
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function get_col_info($info_type='name', $col_offset=-1)
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{
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if ( $this->col_info )
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{
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if ( $col_offset == -1 )
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{
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$i=0;
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foreach($this->col_info as $col )
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{
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$new_array[$i] = $col->{$info_type};
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$i++;
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}
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return $new_array;
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}
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else
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{
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return $this->col_info[$col_offset]->{$info_type};
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}
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}
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}
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}
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$wpdb = new wpdb(DB_USER, DB_PASSWORD, DB_NAME, DB_HOST);
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?>
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