I’ve just finished an small project for one company: it’s about “Registru de casa”, some paperwork that all romanian companies needs to mantain on daily basis. I’ve used PHP, Ajax-JQuery with MySQL database. Fast and clean. See here: www.tantar.info/registrucasa .

Here, i-ve build an new PHP Database class to help me:

1. First, how to use

$cDB=new tDatabase;
$cDB->dbConnect(DB_SERVER,DB_SERVER_USERNAME,DB_SERVER_PASSWORD,DB_DATABASE);

// now, to retrieve all tables from database:

$array_of_tables=$cDB->dbFetchTables();

echo("<pre>");print_r($array_of_tables);echo("</pre>");

<?php

/**
 * @author Cristian Tantar <www.tantar.info> <contact@tantar.info>
 * @copyright 2009
 */

class tDatabase extends tDebug {

  var $connection=false;

  function tDatabase() {
  	// do nothing

  }

  function dbConnect($host, $name, $pass, $db){
  // conect to database
  $connection = @mysql_connect("$host","$name", "$pass");
  if(!$connection){
  	$this->PrintDebug(mysql_errno().":".mysql_error()."<BR> LINE ".__LINE__.", FILE: ".__FILE__,1);
  	die();
  }
  mysql_select_db("$db", $connection);

  }//ends the connection function

 function dbClose(){
   // close database connection
  mysql_close($this->connection);

  }//ends the close function

  function dbFetchRow($query){
  // fetch one row with data from query
  $rows = mysql_fetch_row($this->dbQuery($query));
  return $rows;
  }

  function dbFetchArray($query){
  // fetch array with data from query
  $array = mysql_fetch_array($this->dbQuery($query));
  return $array;
  }

function dbFetchArrayResult($result){
  // fetch array from resultset ( this result can be: $result=$db->query($sql) , or other)
  $array = mysql_fetch_array($result);
  return $array;
  }

  function dbFetchField($query,$field){
  // return only specified field value, or n/a if empty
  $row=$this->dbFetchArray($query);
  if($row[$field]){
  	$field = $row[$field];
  }else{
$field="n/a";
  }
  return $field;
  }

function dbFetchFieldResult($result,$field){
  // return specified field, but from result, instead of sql query
  $row=$this->dbFetchArrayResult($result);
  if($row[$field]){
  	$field = $row[$field];
  }else{
$field="n/a";
  }
  return $field;
  }

  function dbFetchNum($query){
  	/* Get number of rows in query */
  $num = mysql_num_rows($this->dbQuery($query));
  return $num;
  }

  function dbFetchNumResult($result){
  	/* Get number of rows in result */
  $num = mysql_num_rows($result);
  return $num;
  }

function dbFetchTables(){
// return array of tables in database
  	$result=mysql_list_tables(DB_DATABASE) or die (mysql_error());
  	$tables=array();
  	while($tbl=mysql_fetch_array($result)){
  		$tables[]=$tbl[0];
  	}
  	return $tables;
  }

  function dbLastId(){
// return last id generated from previous operation
  	return mysql_insert_id();
  }

  function dbFetchResultsQuery($sql){
  // return array of results from query: $array[0]=row  0, $array[1]=row 1
  // you can retreive data: $array[0][$field]
    $resultArr=array();
$res=$this->dbQuery($sql);
while($data=$this->dbFetchArrayResult($res)){
$resultArr[]=$data;
}
return $resultArr;
  }
function dbQuery($sql){
// return resultset of sql query
  $resultSet=mysql_ query($sql) or die(mysql_error());
return $result;
}

 }//ends the class

?>

<?php

/**
 * simple debug class found on internet. not my property.
 */

class tDebug
{
 var $logfile;
 var $debug;

/*==============================================================================
Constructor
Arguments :- $debug_yesno. If 1 then errors will be logged,else displayed
==============================================================================*/
 function hDebug($debug_yesno=0,$logfile_path="")
 {
 $this->debug=$debug_yesno;
 $this->printdebug=1;

 //Report only user generated error messages
 error_reporting(0);

 if($this->debug>=1)
 {
 $this->logfile=$logfile_path;
 set_error_handler(array($this,"ErrorHandler"));
 }
 else
 {
 restore_error_handler();
 }
 }

/*==============================================================================
Following function logs an error message
==============================================================================*/
 function ErrorHandler($errno,$errstr,$errfile,$errline)
 {
 $errtime=date("H:i:s - d/m/y");
 $error_message="An error occured on ".$errtime."\n";
 $error_message .="Details are as follows\n";
 $error_message .="Error Number : $errno\n";
 $error_message .=$errstr."\nOccured in ".$errfile."\n";
 $error_message .="On Line $errline \n\n";
 $error_message .=str_repeat("-",50);
 $error_message .="\n";
 $fp=fopen($this->logfile,"a+");
 fwrite($fp,$error_message);
 fclose($fp);
 }

/*==============================================================================
Following function prints debug messages on the screen
==============================================================================*/
 function PrintDebug($message,$yesno=0)
 {
 if($yesno>0)
 {
 $message="<font face=\"verdana\" size=\"2\" color=\"red\">Debug : ".$message."</font><br>";
 print $message;
 }
 }
}

?>