Location: PHPKode > projects > Cadence Guestbook Host > cadence/class/database/mysql.db.php
<?php

/************************************
 * Cadence
 * Remotely Hosted Guestbook Script.
 * (c) 2006, Dennis Pedrie
 * www.CadenceBook.com
 * ez_sql.php
 * Last Modified 11-30-05
 ************************************
 * Author: Justin Vincent
 * Web: http://php.justinvincent.com
 ***********************************
 * This file is part of Cadence Guestbook
 * Cadence is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published
 * by the Free Software Foundation; either version 2 of the License,
 * or (at your option) any later version.
 *
 * Cadence is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA  02111-1307  USA
 ***********************************/

define("EZSQL_VERSION","1.26");
define("OBJECT","OBJECT",true);
define("ARRAY_A","ARRAY_A",true);
define("ARRAY_N","ARRAY_N",true);

	class db {

		var $trace = false;      // same as $debug_all
		var $debug_all = false;  // same as $trace
		var $show_errors = true;
		var $num_queries = 0;
		var $last_query;
		var $col_info;
		var $debug_called;
		var $vardump_called;
		var $debug_cache = array();
		var $rows_affected;

		// ==================================================================
		//	DB Constructor - connects to the server and selects a database

		function db($dbuser, $dbpassword, $dbname, $dbhost)
		{

			$this->dbh = @mysql_connect($dbhost,$dbuser,$dbpassword);

			if ( ! $this->dbh )
			{
				$this->print_error("<ol><b>Error establishing a database connection!</b><li>Are you sure you have the correct user/password?<li>Are you sure that you have typed the correct hostname?<li>Are you sure that the database server is running?</ol>");
			}


			$this->select($dbname);

		}

		// ==================================================================
		//	Select a DB (if another one needs to be selected)

		function select($db)
		{
			if ( !@mysql_select_db($db,$this->dbh))
			{
				$this->print_error("<ol><b>Error selecting database <u>$db</u>!</b><li>Are you sure it exists?<li>Are you sure there is a valid database connection?</ol>");
			}
		}

		// ====================================================================
		//	Format a string correctly for safe insert under all PHP conditions

		function escape($str)
		{
			return mysql_real_escape_string(stripslashes($str));
		}

		// ==================================================================
		//	Print SQL/DB error.

		function print_error($str = "")
		{

			// All erros go to the global error array $EZSQL_ERROR..
			global $EZSQL_ERROR;

			// If no special error string then use mysql default..
			if ( !$str )
			{
				$str = mysql_error($this->dbh);
				$error_no = mysql_errno($this->dbh);
			}

			// Log this error to the global array..
			$EZSQL_ERROR[] = array
							(
								"query"      => $this->last_query,
								"error_str"  => $str,
								"error_no"   => $error_no
							);

			// Is error output turned on or not..
			if ( $this->show_errors )
			{
				// If there is an error then take note of it
				/*print "<blockquote><font face=arial size=2 color=ff0000>";
				print "<b>SQL/DB Error --</b> ";
				print "[<font color=000077>$str</font>]";
				print "</font></blockquote>";*/
				include "templates/system/dberr.php";
				exit;
			}
			else
			{
				return false;
			}
		}

		// ==================================================================
		//	Turn error handling on or off..

		function show_errors()
		{
			$this->show_errors = true;
		}

		function hide_errors()
		{
			$this->show_errors = false;
		}

		// ==================================================================
		//	Kill cached query results

		function flush()
		{

			// Get rid of these
			$this->last_result = null;
			$this->col_info = null;
			$this->last_query = null;

		}

		// ==================================================================
		//	Basic Query	- see docs for more detail

		function query($query)
		{

			// For reg expressions
			$query = trim($query);

			// initialise return
			$return_val = 0;

			// Flush cached values..
			$this->flush();

			// Log how the function was called
			$this->func_call = "\$db->query(\"$query\")";

			// Keep track of the last query for debug..
			$this->last_query = $query;

			// Perform the query via std mysql_query function..
			$this->result = @mysql_query($query,$this->dbh);
			$this->num_queries++;

			// If there is an error then take note of it..
			if ( mysql_error() )
			{
				$this->print_error();
				return false;
			}

			// Query was an insert, delete, update, replace
			if ( preg_match("/^(insert|delete|update|replace)\s+/i",$query) )
			{
				$this->rows_affected = mysql_affected_rows();

				// Take note of the insert_id
				if ( preg_match("/^(insert|replace)\s+/i",$query) )
				{
					$this->insert_id = mysql_insert_id($this->dbh);
				}

				// Return number fo rows affected
				$return_val = $this->rows_affected;
			}
			// Query was an select
			else
			{

				// Take note of column info
				$i=0;
				while ($i < @mysql_num_fields($this->result))
				{
					$this->col_info[$i] = @mysql_fetch_field($this->result);
					$i++;
				}

				// Store Query Results
				$num_rows=0;
				while ( $row = @mysql_fetch_object($this->result) )
				{
					// Store relults as an objects within main array
					$this->last_result[$num_rows] = $row;
					$num_rows++;
				}

				@mysql_free_result($this->result);

				// Log number of rows the query returned
				$this->num_rows = $num_rows;

				// Return number of rows selected
				$return_val = $this->num_rows;
			}

			// If debug ALL queries
			$this->trace || $this->debug_all ? $this->debug() : null ;

			$this->rows_affected = mysql_affected_rows();
			//echo mysql_affected_rows();
			
			return $return_val;

		}

		// ==================================================================
		//	Get one variable from the DB - see docs for more detail

		function get_var($query=null,$x=0,$y=0)
		{

			// Log how the function was called
			$this->func_call = "\$db->get_var(\"$query\",$x,$y)";

			// If there is a query then perform it if not then use cached results..
			if ( $query )
			{
				$this->query($query);
			}

			// Extract var out of cached results based x,y vals
			if ( $this->last_result[$y] )
			{
				$values = array_values(get_object_vars($this->last_result[$y]));
			}

			// If there is a value return it else return null
			return (isset($values[$x]) && $values[$x]!=='')?$values[$x]:null;
		}

		// ==================================================================
		//	Get one row from the DB - see docs for more detail

		function get_row($query=null,$output=OBJECT,$y=0)
		{

			// Log how the function was called
			$this->func_call = "\$db->get_row(\"$query\",$output,$y)";

			// If there is a query then perform it if not then use cached results..
			if ( $query )
			{
				$this->query($query);
			}

			// If the output is an object then return object using the row offset..
			if ( $output == OBJECT )
			{
				return $this->last_result[$y]?$this->last_result[$y]:null;
			}
			// If the output is an associative array then return row as such..
			elseif ( $output == ARRAY_A )
			{
				return $this->last_result[$y]?get_object_vars($this->last_result[$y]):null;
			}
			// If the output is an numerical array then return row as such..
			elseif ( $output == ARRAY_N )
			{
				return $this->last_result[$y]?array_values(get_object_vars($this->last_result[$y])):null;
			}
			// If invalid output type was specified..
			else
			{
				$this->print_error(" \$db->get_row(string query, output type, int offset) -- Output type must be one of: OBJECT, ARRAY_A, ARRAY_N");
			}

		}

		// ==================================================================
		//	Function to get 1 column from the cached result set based in X index
		// se docs for usage and info

		function get_col($query=null,$x=0)
		{

			// If there is a query then perform it if not then use cached results..
			if ( $query )
			{
				$this->query($query);
			}

			// Extract the column values
			for ( $i=0; $i < count($this->last_result); $i++ )
			{
				$new_array[$i] = $this->get_var(null,$x,$i);
			}

			return $new_array;
		}

		// ==================================================================
		// Return the the query as a result set - see docs for more details

		function get_results($query=null, $output = OBJECT)
		{

			// Log how the function was called
			$this->func_call = "\$db->get_results(\"$query\", $output)";

			// If there is a query then perform it if not then use cached results..
			if ( $query )
			{
				$this->query($query);
			}

			// Send back array of objects. Each row is an object
			if ( $output == OBJECT )
			{
				return $this->last_result;
			}
			elseif ( $output == ARRAY_A || $output == ARRAY_N )
			{
				if ( $this->last_result )
				{
					$i=0;
					foreach( $this->last_result as $row )
					{

						$new_array[$i] = get_object_vars($row);

						if ( $output == ARRAY_N )
						{
							$new_array[$i] = array_values($new_array[$i]);
						}

						$i++;
					}

					return $new_array;
				}
				else
				{
					return null;
				}
			}
		}


		// ==================================================================
		// Function to get column meta data info pertaining to the last query
		// see docs for more info and usage

		function get_col_info($info_type="name",$col_offset=-1)
		{

			if ( $this->col_info )
			{
				if ( $col_offset == -1 )
				{
					$i=0;
					foreach($this->col_info as $col )
					{
						$new_array[$i] = $col->{$info_type};
						$i++;
					}
					return $new_array;
				}
				else
				{
					return $this->col_info[$col_offset]->{$info_type};
				}

			}

		}


		// ==================================================================
		// Dumps the contents of any input variable to screen in a nicely
		// formatted and easy to understand way - any type: Object, Var or Array

		function vardump($mixed='')
		{
			global $CONFIG;

			echo "<p><table><tr><td bgcolor=ffffff><blockquote><font color=000090>";
			echo "<pre><font face=arial>";

			if ( ! $this->vardump_called )
			{
				echo "<font color=800080><b>ezSQL</b> (v". $CONFIG['cadence_version'] .") <b>Variable Dump..</b></font>\n\n";
			}

			$var_type = gettype ($mixed);
			print_r(($mixed?$mixed:"<font color=red>No Value / False</font>"));
			echo "\n\n<b>Type:</b> " . ucfirst($var_type) . "\n";
			echo "<b>Last Query</b> [$this->num_queries]<b>:</b> ".($this->last_query?$this->last_query:"NULL")."\n";
			echo "<b>Last Function Call:</b> " . ($this->func_call?$this->func_call:"None")."\n";
			echo "<b>Last Rows Returned:</b> ".count($this->last_result)."\n";
			echo "</font></pre></font></blockquote></td></tr></table>".$this->donation();
			echo "\n<hr size=1 noshade color=dddddd>";

			$this->vardump_called = true;

		}

		// Alias for the above function
		function dumpvar($mixed)
		{
			$this->vardump($mixed);
		}

		// ==================================================================
		// Displays the last query string that was sent to the database & a
		// table listing results (if there were any).
		// (abstracted into a seperate file to save server overhead).

		function debug()
		{
			global $CONFIG;
			$this->debug_cache[''];
			$this->debug_called = true;
		}

		// =======================================================
		// Naughty little function to ask for some remuniration!

		function donation()
		{
		}
		
		function dberr() {
			include "templates/system/dberr.php";
		}
		

	}

?>
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