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//homepage/v-mt/php/extlib/ezsql/ezsql_mssqlserver.php

<?php
	// ==================================================================
	// Author: Justin Vincent (justin@visunet.ie)
	//	Web: 	http://php.justinvincent.com
	//	Name: 	ezSQL
	// 	Desc: 	Class to make it very easy to deal with MS SQL database connections.
	//
	//	N.B. ezSQL was converted for use with MS SQL
	//	 by Tom De Bruyne (tom@challenge.be).
	//
	// !! IMPORTANT !!
	//
	// Please send me a mail telling me what you think of ezSQL
	// and what your using it for!! Cheers. [ justin@visunet.ie ]
	//
	// ==================================================================
	// User Settings -- CHANGE HERE

define("EZSQL_DB_USER", "");		// <-- MS SQL Server db user
	define("EZSQL_DB_PASSWORD", "");	// <-- MS SQL Server db password
	define("EZSQL_DB_NAME", "");		// <-- MS SQL Server db pname
	define("EZSQL_DB_HOST", "");		// <-- MS SQL Server server host

// ==================================================================
	//	ezSQL Constants
	define("EZSQL_VERSION","1.26");
	define("OBJECT","OBJECT",true);
	define("ARRAY_A","ARRAY_A",true);
	define("ARRAY_N","ARRAY_N",true);

// ==================================================================
	//	The Main Class

class ezsql {

var $debug_called;
		var $vardump_called;
		var $show_errors = true;
		var $num_queries = 0;
		var $debug_all = false;
		var $last_query;
		var $col_info;
		
		// ==================================================================
		//	DB Constructor - connects to the server and selects a database

function db($dbuser, $dbpassword, $dbname, $dbhost)
		{
			$this->dbh = @mssql_connect($dbhost, $dbuser, $dbpassword);
						
			if ( ! $this->dbh )	{
				$this->print_error("<ol>Error establishing a database connection!<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($db)
		{
			if ( FALSE == mssql_select_db ($db) ) {
 $this->print_error("<ol>Error establishing a database connection!<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>");
 die;
 }
		}

// ====================================================================
		//	Format a string correctly for safe insert under all PHP conditions
		
		function escape($str)
		{
			
			// This deals with quote escaping
			$str = str_replace("'","''",str_replace("\'","'",$str));

// These values need to be escaped for ms sql
			$escape = array ( "\n"=>"\\\\012","\r"=>"\\\\015");
	
			// Firstly unescape
			foreach ( $escape as $match => $replace )
			{
				$str = str_replace($match,$replace,$str);
			}

return $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, take last mssql error	
			if ( !$str ) $str = mssql_get_last_message();

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

// Is error output turned on or not..
			if ( $this->show_errors )
			{
				// If there is an error then take note of it
				print "<blockquote>";
				print "SQL/DB Error -- ";
				print "[$str]";
				print "</blockquote>";
			}
			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);

// 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 mssql_query function..
			$this->result = @mssql_query($query, $this->dbh);
			$this->num_queries++;
			
			// Unfortunately, PHP fuctions for MS SQL currently don't offer a decent way
			// to retrieve errors from MS SQL
			// Make sure not to run a query between the actual query and this one !
				
			$get_errorcode = "SELECT @@ERROR as errorcode";
			$error_res = @mssql_query($get_errorcode, $this->dbh);
			$errorcode = @mssql_result($error_res, 0, "errorcode");

// If there was an insert, delete or update see how many rows were affected
			// (Also, If there there was an insert take note of the last OID
			$query_type = array("insert","delete","update","replace");

// loop through the above array
			foreach ( $query_type as $word )
			{
				// This is true if the query starts with insert, delete or update
				if ( preg_match("/^$word\s+/i",$query) )
				{
					$this->rows_affected = @mssql_rows_affected ($this->dbh);
					
					// This gets the insert ID
					if ( $word == "insert" || $word == "replace" )
					{
						$get_last_ident = "SELECT @@IDENTITY as id";
						$last_res = @mssql_query($get_last_ident, $this->dbh);
						$this->insert_id = @mssql_result($last_res, 0, "id");
						
						// If insert id then return it - true evaluation
						return $this->insert_id;
					}
					
					// Set to false if there was no insert id
					$this->result = false;
				}
			}

if ($errorcode <> 0) {
				// there is an error
				$this->print_error();
			}
			else
			{
				
				// =======================================================
				// Take note of column info

$i=0;
				while ($i < @mssql_num_fields($this->result))
				{
					$this->col_info[$i]->name = @mssql_field_name($this->result,$i);
					$this->col_info[$i]->type = @mssql_field_type($this->result,$i);
					$this->col_info[$i]->size = @mssql_field_length($this->result,$i);
					$i++;
				}

// =======================================================
				// Store Query Results

$i=0;
				while ( $row = @mssql_fetch_object($this->result) )
				{
					// Store relults as an objects within main array
					$this->last_result[$i] = $row;

$i++;
				}

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

//}

@mssql_free_result($this->result);

// If this was a select..
				if ( preg_match("/^(select|show|desc)\s+/i",$query) )
				{
					
					// If debug ALL queries
					$this->debug_all ? $this->debug() : null ;
					
					// If there were results then return true for $db->query
					if ( $i )
					{
						return true;
					}
					else
					{
						return false;
					}
				}
				else
				{
					// If debug ALL queries
					$this->debug_all ? $this->debug() : null ;
					
					// Update insert etc. was good..
					return true;
				}

}
		}

// ==================================================================
		//	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='')
		{

echo "<table><tr><td bgcolor=ffffff><blockquote>";
			echo "<pre>";

if ( ! $this->vardump_called )
			{
				echo "ezSQL (v".EZSQL_VERSION.") Variable Dump..\n\n";
			}

$var_type = gettype ($mixed);
			print_r(($mixed?$mixed:"No Value / False"));
			echo "\n\nType: " . ucfirst($var_type) . "\n";
			echo "Last Query [$this->num_queries]: ".($this->last_query?$this->last_query:"NULL")."\n";
			echo "Last Function Call: " . ($this->func_call?$this->func_call:"None")."\n";
			echo "Last Rows Returned: ".count($this->last_result)."\n";
			echo "</pre></blockquote></td></tr></table>".$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()
		{

echo "<blockquote>";

// Only show ezSQL credits once..
			if ( ! $this->debug_called )
			{
				echo "ezSQL (v".EZSQL_VERSION.") Debug..\n";
			}
			echo "Query [$this->num_queries] -- ";
			echo "[$this->last_query]";

echo "Query Result..";
				echo "<blockquote>";

if ( $this->col_info )
			{

// =====================================================
				// Results top rows

echo "<table cellpadding=5 cellspacing=1 bgcolor=555555>";
				echo "<tr bgcolor=eeeeee><td nowrap valign=bottom>(row)</td>";

for ( $i=0; $i < count($this->col_info); $i++ )
				{
					echo "<td nowrap align=left valign=top>{$this->col_info[$i]->type} {$this->col_info[$i]->max_length} {$this->col_info[$i]->name}</td>";
				}

echo "</tr>";

// ======================================================
				// print main results

if ( $this->last_result )
			{

$i=0;
				foreach ( $this->get_results(null,ARRAY_N) as $one_row )
				{
					$i++;
					echo "<tr bgcolor=ffffff><td bgcolor=eeeeee nowrap align=middle>$i</td>";

foreach ( $one_row as $item )
					{
						echo "<td nowrap>$item</td>";
					}

echo "</tr>";
				}

} // if last result
			else
			{
				echo "<tr bgcolor=ffffff><td colspan=".(count($this->col_info)+1).">No Results</td></tr>";
			}

echo "</table>";

} // if col_info
			else
			{
				echo "No Results";
			}

echo "</blockquote></blockquote>".$this->donation()."<hr noshade color=dddddd size=1>";

$this->debug_called = true;
		}

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

function donation()
		{
			return "If ezSQL has helped <a href=\"https://www.paypal.com/xclick/business=justin%40justinvincent.com&item_name=ezSQL&no_note=1&tax=0\" style=\"color: 0000CC;\">make a donation!?</a> &nbsp;&nbsp;[ go on! you know you want to! ]";	
		}

}

// automatically create a new $db object

#$db = new db(EZSQL_DB_USER, EZSQL_DB_PASSWORD, EZSQL_DB_NAME, EZSQL_DB_HOST);

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