function select($options) {
$default = array (
‘table’ => ”,
‘fields’ => ‘*’,
‘condition’ => ’1′,
‘order’ => ’1′,
‘limit’ => 100000,
‘groupby’ =>”
);
$options = array_merge($default,$options);

//modificacion group by
if($options['groupby']==”)
$sql = "SELECT {$options['fields']} FROM {$options['table']} WHERE {$options['condition']} ORDER BY {$options['order']} LIMIT {$options['limit']}";
else
$sql = "SELECT {$options['fields']} FROM {$options['table']} WHERE {$options['condition']} GROUP BY {$options['groupby']} ORDER BY {$options['order']} LIMIT {$options['limit']}";

return $this->query($sql);

e.g.
$data = array(
// have to escape this?
‘name’ => mysql_real_escape_string($var),
);
$result = $m->insert(‘users’,$data);

i have a very simple class tutorial on the same topic. if you found this class quite turf to understand you can give a loot to my tutorial.

http://www.codingquery.com/php-mysql-connection-class-source-code

/**
*
* This function returns the field names of a table
*
*
* @param string $result the mysql resource pointer to a query
* @return returns a 2D array with the field names
*/
public function get_fields($result)
{
$row = $this->fetchAssoc($result);

if($row==TRUE)
return array_keys($row);
else
return false;
}
/**
* prevent sql injections
*
*/
public function prevent_injection($value) {
// Stripslashes
if (get_magic_quotes_gpc()) {
$value = stripslashes($value);
}
// Quote if not a number or a numeric string
if (!is_numeric($value)) {
$value = mysql_real_escape_string($value);
}
return $value;
}

thank you