Simple SQL: MySQL wrapper to shortcut common tasks execution

SYNOPSIS:
This class is meant to shortcut common MySQL database access tasks.

DESCRIPTION:
Simple SQL provides functions to retrieve single fields or rows of a table, insert rows given arrays of column names and values, update single fields of a given table row, delete given table rows and many other common needs.

ADVANTAGES:
- This PHP class file will eliminate nearly all code from the built in std mysql PHP functions.
- Speed, it will dramatically decrease development and execution time.
- Extremely easy to use; one hardly has to understand the MySQL syntax.
- It automatically determines whether or not there is an open connection to the MySQL server. It will connect and reconnect automatically.
- The built in debugging functions make it easy to solve syntax error and logic error.
- Supports arrays for arguments and returns ASSOC arrays from the DB with indexes.
- Stores resource links and common variables such as the last table used.

USE:
Simply include the file at the top of any script you wish to use it on. This class is highly customizeable.

EXAMPLES:


--- Example 1 ----------------------------- (Shows how little line of code is required to simply grab content from a table without using ANY mysql syntax)

<? include('SimpleSQL.class.php');
$db=new SimpleSQL("test_db","localhost","root","");
//Select all rows and coloumns of data from table 'tablename' and put into array
$db->get_content("tablename");
print_r($db->result);
//echo one cell from the result
echo $db->result[4]["active"];


--- Example 2 ----------------------------- (grab one row from a table)

//Get one row from the table "tablename" (note argument for table can be empty because script stores last table used into a public variable)
$db->get_content("","WHERE location='home' AND active='1'");
print_r($db->result);
//echo the `content` (example) from the result
echo $db->result["content"];


--- Example 3 ----------------------------- (shows how to order your results and to limit by 5)

//Get all rows where active is =0, order by id DESC, limit to 5
$db->get_content("","WHERE active='0'","id DESC",5);
print_r($db->result);


--- Example 4 ----------------------------- (shows how simple it is to change the public variables in the script)

//Switch on debugging mode
$db->debug=true;
//Switch on error messaging
$db->errmsgs=true;
//Switch to another DB and change username and password
$db->db_name="AnotherDatabase";
$db->db_username="username";
$db->db_password="password";


--- Example 5 ----------------------------- (insert data into given fields)

//insert data into a database, first list the fields, then the data, use this format: 'filed1','field2','field3'
$db->insert("'field1','field2','field3'","'data for field 1','data for field 2','data for field 3'");
//echo errors if any found
echo $db->error;


--- Example 6 ----------------------------- (update data in any given field)

//Following queries: "UPDATE `new_table` SET `field1`='new data here' WHERE id='34' LIMIT 1;"
$db->update("field1","new value","new_table","WHERE id='34'",1);


--- Example 7 ----------------------------- (delete data)

//Following queries: "DELETE FROM `new_table` WHERE active='0' LIMIT 5;"
//(note: how the following exempts the 2nd argument which is the table name, table names are stored from the last query)
//The third argument is the ORDER BY clause, may be omitted
$db->delete("WHERE active='0'","","",5);


--- Example 8 ----------------------------- (list the number of rows from last query OR new select statment)

//calling the num_rows function will RETURN the integer and not STORE the results into the result public variable
//Following code will return the number of rows from the last SELECT statment, if there was no last SELECT statment then it will return NULL
$num_rows=$db->num_rows();
//Following exemplifies: mysql_num_rows(mysql_query("SELECT * FROM `new_table` WHERE active='1' ORDER BY id DESC LIMIT 4;"))
$num_rows=$db->num_rows("new_table","WHERE active='1'","id DESC", 4);


--- Example 9 ----------------------------- (if there is a need to send your own query then call the private function itself)

//A long complicated query, the resourse is stored in $db->_link and if any errors are stored in $db->error
$db->_query("CREATE TABLE `new_table` ( `id` INT(10) NOT NULL AUTO_INCREMENT, `username` VARCHAR(25) NOT NULL, `password` VARCHAR(255) NOT NULL, `active` TINYINT(1) DEFAULT '0' NOT NULL, PRIMARY KEY (`id`) ) TYPE = MYISAM;");